Victor Phan
614 lines
28 KiB
Plaintext
614 lines
28 KiB
Plaintext
{
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"cells": [
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "17da4353",
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"metadata": {},
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"outputs": [],
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"source": [
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"# Import libraries for Element84 Earth Search\n",
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"import numpy as np\n",
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"import pandas as pd\n",
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"import xarray as xr\n",
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"import matplotlib.pyplot as plt\n",
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"import seaborn as sns\n",
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"\n",
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"# Element84 Earth Search STAC\n",
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"import pystac_client\n",
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"from odc.stac import load\n",
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"\n",
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"# Machine Learning\n",
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"import torch\n",
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"import torch.nn as nn\n",
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"import torch.optim as optim\n",
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"from torch.utils.data import TensorDataset, DataLoader\n",
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"from sklearn.metrics import classification_report, confusion_matrix, accuracy_score\n",
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"from sklearn.model_selection import train_test_split\n",
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"\n",
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"print(\"✅ Import thành công\")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "9c063be3",
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"metadata": {},
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"outputs": [],
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"source": [
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"# Kết nối Element84 Earth Search (hosted trên AWS)\n",
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"def connect_earth_search():\n",
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" \"\"\"Kết nối đến Element84 Earth Search STAC API\"\"\"\n",
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" catalog = pystac_client.Client.open(\n",
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" \"https://earth-search.aws.element84.com/v1\"\n",
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" )\n",
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" return catalog\n",
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"\n",
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"catalog = connect_earth_search()\n",
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"print(\"✅ Element84 Earth Search kết nối thành công\")\n",
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"print(f\" API: earth-search.aws.element84.com\")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "83784d01",
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"metadata": {},
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"outputs": [],
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"source": [
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"# Cấu hình vùng và thời gian\n",
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"date_range = (\"2022-09-01\", \"2023-10-01\")\n",
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"longtitude_range = (105.5, 106.4)\n",
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"latitude_range = (9.2, 10.0)\n",
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"\n",
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"# Tạo bounding box\n",
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"bbox = (longtitude_range[0], latitude_range[0], longtitude_range[1], latitude_range[1])\n",
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"\n",
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"# Query Sentinel-2 từ Element84\n",
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"search = catalog.search(\n",
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" collections=[\"sentinel-2-l2a\"],\n",
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" bbox=bbox,\n",
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" datetime=f\"{date_range[0]}/{date_range[1]}\",\n",
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" query={\"eo:cloud_cover\": {\"lt\": 30}}\n",
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")\n",
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"\n",
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"items = search.item_collection()\n",
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"print(f\"✅ Tìm thấy {len(items)} scenes Sentinel-2\")\n",
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"\n",
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"# Load data với odc-stac\n",
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"data_sen2 = load(\n",
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" items,\n",
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" bands=[\"red\", \"green\", \"blue\", \"nir\", \"swir16\", \"swir22\", \"scl\"],\n",
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" bbox=bbox,\n",
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" resolution=10,\n",
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" chunks={\"time\": 1, \"x\": 2048, \"y\": 2048},\n",
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" groupby=\"solar_day\"\n",
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")\n",
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"\n",
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"print(f\"✅ Sentinel-2 raw: {data_sen2.dims}\")\n",
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"print(f\" Variables: {list(data_sen2.data_vars)}\")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "c3faed92",
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"metadata": {},
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"outputs": [],
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"source": [
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"# Tiền xử lý Sentinel-2: cloud mask + NDVI + resampling\n",
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"def mask_clean(ds):\n",
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" \"\"\"Cloud masking sử dụng SCL band (Scene Classification Layer)\"\"\"\n",
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" if \"scl\" not in ds:\n",
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" print(\"⚠️ Không có SCL band, bỏ qua cloud masking\")\n",
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" return ds\n",
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" \n",
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" cloud_mask = (\n",
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" (ds[\"scl\"] == 3) | # cloud shadow\n",
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" (ds[\"scl\"] == 8) | # cloud medium probability\n",
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" (ds[\"scl\"] == 9) | # cloud high probability\n",
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" (ds[\"scl\"] == 10) # thin cirrus\n",
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" )\n",
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" \n",
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" ds_masked = ds.where(~cloud_mask)\n",
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" return ds_masked.drop_vars(\"scl\", errors=\"ignore\")\n",
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"\n",
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"def calculate_indices(ds, index=\"NDVI\", satellite_mission=\"s2\"):\n",
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" \"\"\"Tính chỉ số NDVI cho Sentinel-2\"\"\"\n",
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" if index == \"NDVI\":\n",
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" ndvi = (ds[\"nir\"] - ds[\"red\"]) / (ds[\"nir\"] + ds[\"red\"] + 1e-8)\n",
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" ds[\"NDVI\"] = ndvi\n",
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" return ds\n",
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"\n",
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"def fill_nan(ds):\n",
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" \"\"\"Fill NaN bằng interpolation theo thời gian\"\"\"\n",
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" return ds.interpolate_na(dim=\"time\", method=\"linear\", fill_value=\"extrapolate\")\n",
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"\n",
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"# Áp dụng tiền xử lý\n",
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"data_clean = mask_clean(data_sen2)\n",
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"data_ndvi = calculate_indices(data_clean, index=\"NDVI\", satellite_mission=\"s2\")\n",
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"data_fill = fill_nan(data_ndvi)\n",
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"data_sen2_monthly = data_fill.resample(time=\"1MS\").mean().compute()\n",
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"\n",
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"print(f\"✅ S2 monthly shape: {data_sen2_monthly.dims}\")\n",
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"print(f\" Variables: {list(data_sen2_monthly.data_vars)}\")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "569bfebb",
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"metadata": {},
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"outputs": [],
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"source": [
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"# Tải Sentinel-1 (SAR VV/VH) từ Element84\n",
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"search_s1 = catalog.search(\n",
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" collections=[\"sentinel-1-grd\"],\n",
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" bbox=bbox,\n",
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" datetime=f\"{date_range[0]}/{date_range[1]}\",\n",
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" query={\n",
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" \"sat:orbit_state\": {\"eq\": \"descending\"},\n",
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" \"sar:product_type\": {\"eq\": \"GRD\"}\n",
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" }\n",
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")\n",
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"\n",
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"items_s1 = search_s1.item_collection()\n",
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"print(f\"✅ Tìm thấy {len(items_s1)} scenes Sentinel-1\")\n",
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"\n",
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"if len(items_s1) > 0:\n",
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" data_sen1 = load(\n",
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" items_s1,\n",
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" bands=[\"vv\", \"vh\"],\n",
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" bbox=bbox,\n",
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" resolution=10,\n",
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" chunks={\"time\": 1, \"x\": 2048, \"y\": 2048},\n",
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" groupby=\"solar_day\"\n",
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" )\n",
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" data_sen1_monthly = data_sen1.resample(time=\"1MS\").mean().compute()\n",
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"else:\n",
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" # Tạo dummy data nếu không có S1\n",
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" print(\"⚠️ Không có Sentinel-1, tạo dummy data\")\n",
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" data_sen1_monthly = xr.Dataset({\n",
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" \"vv\": xr.DataArray(\n",
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" np.zeros_like(data_sen2_monthly[\"red\"].values),\n",
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" coords=data_sen2_monthly[\"red\"].coords,\n",
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" dims=data_sen2_monthly[\"red\"].dims\n",
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" ),\n",
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" \"vh\": xr.DataArray(\n",
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" np.zeros_like(data_sen2_monthly[\"red\"].values),\n",
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" coords=data_sen2_monthly[\"red\"].coords,\n",
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" dims=data_sen2_monthly[\"red\"].dims\n",
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" )\n",
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" })\n",
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"\n",
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"print(f\"✅ S1 monthly shape: {data_sen1_monthly.dims}\")\n",
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"print(f\" Variables: {list(data_sen1_monthly.data_vars)}\")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "ecc56c2f",
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"metadata": {},
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"outputs": [],
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"source": [
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"import numpy as np\n",
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"\n",
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"# Ánh xạ nhãn lớp đất\n",
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"label_mapping = {\n",
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" \"Lua tom\": \"0\", \"Lua\": \"1\", \"CHN\": \"2\", \"CLN\": \"3\",\n",
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" \"TS\": \"4\", \"Song\": \"5\", \"Dat xay dung\": \"6\", \"Rung\": \"7\",\n",
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"}\n",
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"\n",
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"def load_train_data(csv_path=\"/media/x79/2A7D-FAA0/remote-sensing/train_data.csv\", label_mapping=None):\n",
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" \"\"\"Load training points từ CSV\"\"\"\n",
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" df = pd.read_csv(csv_path)\n",
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" if label_mapping:\n",
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" df[\"label\"] = df[\"class_name\"].map(label_mapping).astype(str)\n",
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" return df\n",
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"\n",
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"def get_data_sen1_and_sen2(train_df, sen2_data, sen1_data):\n",
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" \"\"\"Extract features từ S2 và S1 tại các điểm training\"\"\"\n",
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" X_list = []\n",
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" y_list = []\n",
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" \n",
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" for idx, row in train_df.iterrows():\n",
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" try:\n",
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" lon, lat = float(row[\"longitude\"]), float(row[\"latitude\"])\n",
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" label = int(row[\"label\"])\n",
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" \n",
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" # Extract S2 features\n",
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" s2_point = sen2_data.sel(x=lon, y=lat, method=\"nearest\")\n",
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" s2_features = []\n",
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" \n",
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" for var in [\"red\", \"green\", \"blue\", \"nir\", \"swir16\", \"swir22\", \"NDVI\"]:\n",
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" if var in s2_point:\n",
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" vals = s2_point[var].values\n",
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" if vals.size > 0:\n",
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" s2_features.extend([\n",
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" np.nanmean(vals), np.nanstd(vals),\n",
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" np.nanmin(vals), np.nanmax(vals)\n",
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" ])\n",
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" else:\n",
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" s2_features.extend([0, 0, 0, 0])\n",
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" \n",
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" # Extract S1 features\n",
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" s1_point = sen1_data.sel(x=lon, y=lat, method=\"nearest\")\n",
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" s1_features = []\n",
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" \n",
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" for var in [\"vv\", \"vh\"]:\n",
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" if var in s1_point:\n",
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" vals = s1_point[var].values\n",
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" if vals.size > 0:\n",
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" s1_features.extend([np.nanmean(vals), np.nanstd(vals)])\n",
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" else:\n",
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" s1_features.extend([0, 0])\n",
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" \n",
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" features = s2_features + s1_features\n",
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" \n",
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" if not np.isnan(features).any() and not np.isinf(features).any():\n",
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" X_list.append(features)\n",
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" y_list.append(label)\n",
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" except Exception as e:\n",
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" continue\n",
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" \n",
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" return X_list, y_list\n",
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"\n",
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"def split_train_data(X, y, test_size=0.2, val_size=0.1, random_state=42):\n",
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" \"\"\"Split data thành train/val/test\"\"\"\n",
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" X = np.array(X, dtype=np.float32)\n",
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" y = np.array(y, dtype=np.int64)\n",
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" \n",
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" X_train, X_temp, y_train, y_temp = train_test_split(\n",
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" X, y, test_size=test_size + val_size, random_state=random_state, stratify=y\n",
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" )\n",
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" \n",
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" val_ratio = val_size / (test_size + val_size)\n",
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" X_val, X_test, y_val, y_test = train_test_split(\n",
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" X_temp, y_temp, test_size=(1 - val_ratio), random_state=random_state, stratify=y_temp\n",
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" )\n",
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" \n",
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" return X_train, X_val, X_test, y_train, y_val, y_test\n",
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"\n",
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"train_data = load_train_data(label_mapping=label_mapping)\n",
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"X, y = get_data_sen1_and_sen2(train_data, data_sen2_monthly, data_sen1_monthly)\n",
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"X_train, X_val, X_test, y_train, y_val, y_test = split_train_data(X, y, test_size=0.2, val_size=0.1)\n",
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"\n",
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"X_train_np = np.array(X_train, dtype=np.float32)\n",
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"X_val_np = np.array(X_val, dtype=np.float32)\n",
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"X_test_np = np.array(X_test, dtype=np.float32)\n",
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"y_train_np = np.array(y_train, dtype=np.int64)\n",
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"y_val_np = np.array(y_val, dtype=np.int64)\n",
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"y_test_np = np.array(y_test, dtype=np.int64)\n",
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"\n",
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"n_features = X_train_np.shape[1]\n",
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"n_classes = len(np.unique(y_train_np))\n",
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"\n",
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"print(f\"✅ Train: {X_train_np.shape} Val: {X_val_np.shape} Test: {X_test_np.shape}\")\n",
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"print(f\" n_features={n_features} n_classes={n_classes}\")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "5492528b",
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"metadata": {},
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"outputs": [],
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"source": [
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"import torch\n",
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"import torch.nn as nn\n",
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"import torch.optim as optim\n",
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"from torch.utils.data import TensorDataset, DataLoader\n",
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"\n",
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"# ── MobileNetV3 + LR-ASPP classifier ──────────────────────────────────────────\n",
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"class MobileNetLRASPPClassifier(nn.Module):\n",
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" \"\"\"\n",
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" MobileNetV3-inspired backbone with LR-ASPP (Lite Reduced ASPP) head\n",
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" for land-use classification on flat feature vectors.\n",
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" \"\"\"\n",
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" def __init__(self, n_features, n_classes):\n",
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" super().__init__()\n",
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" # Feature extraction backbone\n",
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" self.feature_extractor = nn.Sequential(\n",
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" nn.Linear(n_features, 128), nn.BatchNorm1d(128), nn.ReLU(inplace=True), nn.Dropout(0.2),\n",
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" nn.Linear(128, 256), nn.BatchNorm1d(256), nn.ReLU(inplace=True), nn.Dropout(0.3),\n",
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" nn.Linear(256, 512), nn.BatchNorm1d(512), nn.ReLU(inplace=True), nn.Dropout(0.3),\n",
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" )\n",
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" # LR-ASPP Branch 1: global pooling → 128\n",
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" self.global_pool = nn.AdaptiveAvgPool1d(1)\n",
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" self.global_conv = nn.Sequential(nn.Linear(512, 128), nn.ReLU(inplace=True))\n",
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" # LR-ASPP Branch 2: direct 1×1 → 128\n",
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" self.branch_conv = nn.Sequential(nn.Linear(512, 128), nn.BatchNorm1d(128), nn.ReLU(inplace=True))\n",
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" # Fusion → n_classes\n",
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" self.classifier = nn.Sequential(\n",
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" nn.Linear(256, 128), nn.BatchNorm1d(128), nn.ReLU(inplace=True), nn.Dropout(0.4),\n",
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" nn.Linear(128, n_classes),\n",
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" )\n",
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"\n",
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" def forward(self, x):\n",
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" feat = self.feature_extractor(x)\n",
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" global_feat = self.global_pool(feat.unsqueeze(-1)).squeeze(-1)\n",
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" global_feat = self.global_conv(global_feat)\n",
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" branch_feat = self.branch_conv(feat)\n",
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" fused = torch.cat([global_feat, branch_feat], dim=1)\n",
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" return self.classifier(fused)\n",
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"\n",
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"device = torch.device(\"cuda\" if torch.cuda.is_available() else \"cpu\")\n",
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"print(f\"✅ Device: {device}\")\n",
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"model = MobileNetLRASPPClassifier(n_features, n_classes).to(device)\n",
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"print(model)\n",
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"total_params = sum(p.numel() for p in model.parameters() if p.requires_grad)\n",
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"print(f\" Trainable params: {total_params:,}\")\n"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "9da40f5a",
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"metadata": {},
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"outputs": [],
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"source": [
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"%%time\n",
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"import matplotlib.pyplot as plt\n",
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"\n",
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"# ── Hyper-parameters ───────────────────────────────────────────────────────────\n",
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"LEARNING_RATE = 1e-3\n",
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"BATCH_SIZE = 64\n",
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"N_EPOCHS = 60\n",
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"PATIENCE = 10\n",
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"CONV_THRESHOLD = 1e-4 # cải thiện val_loss < THRESHOLD → đánh dấu hội tụ\n",
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"CONV_WINDOW = 3 # cần CONV_WINDOW bước liên tiếp thỏa mãn\n",
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"\n",
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"# ── Tensors & DataLoaders ──────────────────────────────────────────────────────\n",
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"X_tr_t = torch.FloatTensor(X_train_np)\n",
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"y_tr_t = torch.LongTensor(y_train_np)\n",
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"X_va_t = torch.FloatTensor(X_val_np)\n",
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"y_va_t = torch.LongTensor(y_val_np)\n",
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"\n",
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"train_loader = DataLoader(TensorDataset(X_tr_t, y_tr_t), batch_size=BATCH_SIZE, shuffle=True)\n",
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"val_loader = DataLoader(TensorDataset(X_va_t, y_va_t), batch_size=BATCH_SIZE, shuffle=False)\n",
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"\n",
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"# ── Class-weighted loss ────────────────────────────────────────────────────────\n",
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"class_counts = np.bincount(y_train_np)\n",
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"class_weights = 1.0 / (class_counts + 1e-6)\n",
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"class_weights = class_weights / class_weights.sum() * n_classes\n",
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"criterion = nn.CrossEntropyLoss(weight=torch.FloatTensor(class_weights).to(device))\n",
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"\n",
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||
"optimizer = optim.Adam(model.parameters(), lr=LEARNING_RATE, weight_decay=1e-4)\n",
|
||
"scheduler = optim.lr_scheduler.ReduceLROnPlateau(optimizer, mode=\"min\", factor=0.5, patience=5)\n",
|
||
"\n",
|
||
"# ── Training loop ──────────────────────────────────────────────────────────────\n",
|
||
"train_losses, val_losses, val_accs, lr_history = [], [], [], []\n",
|
||
"best_val_loss = float(\"inf\")\n",
|
||
"best_epoch = 1\n",
|
||
"best_state_dict = None\n",
|
||
"patience_counter = 0\n",
|
||
"convergence_epoch = None # ← điểm hội tụ sẽ được ghi lại ở đây\n",
|
||
"early_stop_epoch = None\n",
|
||
"\n",
|
||
"print(\"🚀 Training MobileNetV3 + LR-ASPP...\")\n",
|
||
"print(f\" conv_threshold={CONV_THRESHOLD} conv_window={CONV_WINDOW} patience={PATIENCE}\")\n",
|
||
"for epoch in range(1, N_EPOCHS + 1):\n",
|
||
" # --- Train ---\n",
|
||
" model.train()\n",
|
||
" epoch_loss = 0.0\n",
|
||
" for bx, by in train_loader:\n",
|
||
" bx, by = bx.to(device), by.to(device)\n",
|
||
" optimizer.zero_grad()\n",
|
||
" loss = criterion(model(bx), by)\n",
|
||
" loss.backward()\n",
|
||
" torch.nn.utils.clip_grad_norm_(model.parameters(), max_norm=1.0)\n",
|
||
" optimizer.step()\n",
|
||
" epoch_loss += loss.item()\n",
|
||
" avg_train_loss = epoch_loss / len(train_loader)\n",
|
||
"\n",
|
||
" # --- Validate ---\n",
|
||
" model.eval()\n",
|
||
" val_loss = 0.0; correct = 0; total = 0\n",
|
||
" with torch.no_grad():\n",
|
||
" for bx, by in val_loader:\n",
|
||
" bx, by = bx.to(device), by.to(device)\n",
|
||
" out = model(bx)\n",
|
||
" val_loss += criterion(out, by).item()\n",
|
||
" pred = out.argmax(1)\n",
|
||
" correct += (pred == by).sum().item()\n",
|
||
" total += by.size(0)\n",
|
||
" avg_val_loss = val_loss / len(val_loader)\n",
|
||
" val_acc = correct / total\n",
|
||
"\n",
|
||
" scheduler.step(avg_val_loss)\n",
|
||
" lr = optimizer.param_groups[0][\"lr\"]\n",
|
||
" lr_history.append(lr)\n",
|
||
"\n",
|
||
" train_losses.append(avg_train_loss)\n",
|
||
" val_losses.append(avg_val_loss)\n",
|
||
" val_accs.append(val_acc)\n",
|
||
"\n",
|
||
" # ── Phát hiện điểm hội tụ (sliding window trên val_loss) ──────────────\n",
|
||
" if convergence_epoch is None and epoch >= CONV_WINDOW + 1:\n",
|
||
" window = val_losses[-(CONV_WINDOW + 1):]\n",
|
||
" improvements = [abs(window[i] - window[i - 1]) for i in range(1, len(window))]\n",
|
||
" if all(imp < CONV_THRESHOLD for imp in improvements):\n",
|
||
" convergence_epoch = epoch - CONV_WINDOW + 1\n",
|
||
" print(f\" 📍 Hội tụ phát hiện tại epoch {convergence_epoch} \"\n",
|
||
" f\"(val_loss={val_losses[convergence_epoch-1]:.4f})\")\n",
|
||
"\n",
|
||
" if epoch % 5 == 0 or epoch == 1:\n",
|
||
" print(f\" Epoch {epoch:3d}/{N_EPOCHS} train={avg_train_loss:.4f} \"\n",
|
||
" f\"val={avg_val_loss:.4f} acc={val_acc:.4f} lr={lr:.2e}\")\n",
|
||
"\n",
|
||
" # ── Early stopping ─────────────────────────────────────────────────────\n",
|
||
" if avg_val_loss < best_val_loss:\n",
|
||
" best_val_loss = avg_val_loss\n",
|
||
" best_epoch = epoch\n",
|
||
" best_state_dict = {k: v.clone() for k, v in model.state_dict().items()}\n",
|
||
" patience_counter = 0\n",
|
||
" else:\n",
|
||
" patience_counter += 1\n",
|
||
" if patience_counter >= PATIENCE:\n",
|
||
" early_stop_epoch = epoch\n",
|
||
" print(f\"⏹ Early stopping tại epoch {epoch} (patience={PATIENCE})\")\n",
|
||
" break\n",
|
||
"\n",
|
||
"# Restore best weights\n",
|
||
"model.load_state_dict(best_state_dict)\n",
|
||
"total_epochs = len(train_losses)\n",
|
||
"print(f\"\\n✅ Training hoàn tất! Best epoch={best_epoch} Best val_loss={best_val_loss:.4f}\")\n",
|
||
"if convergence_epoch:\n",
|
||
" print(f\" Điểm hội tụ : epoch {convergence_epoch}\")\n",
|
||
"\n",
|
||
"# ═══════════════════════════════════════════════════════════════════════════════\n",
|
||
"# PHÂN TÍCH ĐIỂM HỘI TỤ — MobileNetV3 + LR-ASPP\n",
|
||
"# EMA-smoothed curves + annotated convergence / best / early-stop markers\n",
|
||
"# ═══════════════════════════════════════════════════════════════════════════════\n",
|
||
"epochs_axis = list(range(1, total_epochs + 1))\n",
|
||
"\n",
|
||
"# Exponential Moving Average smoothing\n",
|
||
"def ema(values, alpha=0.2):\n",
|
||
" s = [values[0]]\n",
|
||
" for v in values[1:]:\n",
|
||
" s.append(alpha * v + (1 - alpha) * s[-1])\n",
|
||
" return s\n",
|
||
"\n",
|
||
"val_losses_ema = ema(val_losses, alpha=0.3)\n",
|
||
"train_losses_ema = ema(train_losses, alpha=0.3)\n",
|
||
"val_accs_ema = ema(val_accs, alpha=0.3)\n",
|
||
"\n",
|
||
"# ── Tính ΔVal-loss per epoch ──────────────────────────────────────────────────\n",
|
||
"delta_val = [abs(val_losses_ema[i] - val_losses_ema[i-1])\n",
|
||
" for i in range(1, len(val_losses_ema))]\n",
|
||
"\n",
|
||
"fig, axes = plt.subplots(2, 2, figsize=(16, 10))\n",
|
||
"\n",
|
||
"# --- Top-left: Loss curves ---\n",
|
||
"ax = axes[0, 0]\n",
|
||
"ax.plot(epochs_axis, train_losses, \"b-\", alpha=0.25, linewidth=0.8)\n",
|
||
"ax.plot(epochs_axis, train_losses_ema, \"b-\", linewidth=2, label=\"Train loss (EMA)\")\n",
|
||
"ax.plot(epochs_axis, val_losses, \"g-\", alpha=0.25, linewidth=0.8)\n",
|
||
"ax.plot(epochs_axis, val_losses_ema, \"g-\", linewidth=2, label=\"Val loss (EMA)\")\n",
|
||
"ax.axvline(x=best_epoch, color=\"red\", linestyle=\"--\", linewidth=1.5,\n",
|
||
" label=f\"Best epoch={best_epoch}\")\n",
|
||
"if convergence_epoch:\n",
|
||
" ax.axvline(x=convergence_epoch, color=\"orange\", linestyle=\":\", linewidth=1.5,\n",
|
||
" label=f\"HỘI TỤ epoch={convergence_epoch}\")\n",
|
||
"if early_stop_epoch:\n",
|
||
" ax.axvline(x=early_stop_epoch, color=\"gray\", linestyle=\"-.\", linewidth=1.5,\n",
|
||
" label=f\"Early stop epoch={early_stop_epoch}\")\n",
|
||
"ax.set_xlabel(\"Epoch\")\n",
|
||
"ax.set_ylabel(\"Loss\")\n",
|
||
"ax.set_title(\"Loss Curves (raw + EMA)\")\n",
|
||
"ax.legend(fontsize=8)\n",
|
||
"ax.grid(True, alpha=0.3)\n",
|
||
"\n",
|
||
"# --- Top-right: Val accuracy ---\n",
|
||
"ax = axes[0, 1]\n",
|
||
"ax.plot(epochs_axis, val_accs, \"g-\", alpha=0.3, linewidth=0.8)\n",
|
||
"ax.plot(epochs_axis, val_accs_ema, \"g-\", linewidth=2, label=\"Val acc (EMA)\")\n",
|
||
"ax.axvline(x=best_epoch, color=\"red\", linestyle=\"--\", linewidth=1.5,\n",
|
||
" label=f\"Best epoch={best_epoch} ({val_accs[best_epoch-1]*100:.2f}%)\")\n",
|
||
"if convergence_epoch:\n",
|
||
" ax.axvline(x=convergence_epoch, color=\"orange\", linestyle=\":\", linewidth=1.5,\n",
|
||
" label=f\"HỘI TỤ epoch={convergence_epoch} ({val_accs[convergence_epoch-1]*100:.2f}%)\")\n",
|
||
"if early_stop_epoch:\n",
|
||
" ax.axvline(x=early_stop_epoch, color=\"gray\", linestyle=\"-.\", linewidth=1.5,\n",
|
||
" label=f\"Early stop\")\n",
|
||
"ax.set_xlabel(\"Epoch\")\n",
|
||
"ax.set_ylabel(\"Accuracy\")\n",
|
||
"ax.set_title(\"Val Accuracy Curve\")\n",
|
||
"ax.legend(fontsize=8)\n",
|
||
"ax.grid(True, alpha=0.3)\n",
|
||
"\n",
|
||
"# --- Bottom-left: ΔVal-loss (marginal improvement) ---\n",
|
||
"ax = axes[1, 0]\n",
|
||
"ax.bar(epochs_axis[1:], delta_val,\n",
|
||
" color=[\"green\" if d > CONV_THRESHOLD else \"salmon\" for d in delta_val],\n",
|
||
" alpha=0.75)\n",
|
||
"ax.axhline(y=CONV_THRESHOLD, color=\"red\", linestyle=\"--\",\n",
|
||
" label=f\"Threshold = {CONV_THRESHOLD:.0e}\")\n",
|
||
"if convergence_epoch:\n",
|
||
" ax.axvline(x=convergence_epoch, color=\"orange\", linestyle=\":\", linewidth=1.5,\n",
|
||
" label=f\"HỘI TỤ epoch={convergence_epoch}\")\n",
|
||
"ax.set_xlabel(\"Epoch\")\n",
|
||
"ax.set_ylabel(\"|ΔVal Loss|\")\n",
|
||
"ax.set_title(\"Marginal Val-Loss Improvement per Epoch\")\n",
|
||
"ax.legend(fontsize=8)\n",
|
||
"ax.grid(True, alpha=0.3)\n",
|
||
"\n",
|
||
"# --- Bottom-right: Learning rate schedule ---\n",
|
||
"ax = axes[1, 1]\n",
|
||
"ax.semilogy(epochs_axis, lr_history, \"purple\", linewidth=2)\n",
|
||
"if convergence_epoch:\n",
|
||
" ax.axvline(x=convergence_epoch, color=\"orange\", linestyle=\":\", linewidth=1.5,\n",
|
||
" label=f\"HỘI TỤ epoch={convergence_epoch}\")\n",
|
||
"ax.axvline(x=best_epoch, color=\"red\", linestyle=\"--\", linewidth=1.5,\n",
|
||
" label=f\"Best epoch={best_epoch}\")\n",
|
||
"ax.set_xlabel(\"Epoch\")\n",
|
||
"ax.set_ylabel(\"Learning Rate (log)\")\n",
|
||
"ax.set_title(\"Learning Rate Schedule (ReduceLROnPlateau)\")\n",
|
||
"ax.legend(fontsize=8)\n",
|
||
"ax.grid(True, alpha=0.3)\n",
|
||
"\n",
|
||
"plt.suptitle(\"MobileNetV3 + LR-ASPP — Convergence Analysis\", fontsize=13, fontweight=\"bold\")\n",
|
||
"plt.tight_layout()\n",
|
||
"plt.show()\n",
|
||
"\n",
|
||
"# ── Tổng kết ──────────────────────────────────────────────────────────────────\n",
|
||
"print(f\"\\n{'═'*60}\")\n",
|
||
"print(f\" Tổng số epoch : {total_epochs}\")\n",
|
||
"print(f\" Best epoch : {best_epoch} (val_loss={best_val_loss:.4f})\")\n",
|
||
"print(f\" Best val accuracy : {val_accs[best_epoch-1]*100:.4f}%\")\n",
|
||
"if convergence_epoch:\n",
|
||
" print(f\" Điểm HỘI TỤ : epoch {convergence_epoch} \"\n",
|
||
" f\"(val_acc={val_accs[convergence_epoch-1]*100:.2f}%)\")\n",
|
||
" wasted = total_epochs - convergence_epoch\n",
|
||
" print(f\" Epochs sau hội tụ : {wasted} \"\n",
|
||
" f\"(có thể giảm N_EPOCHS không ảnh hưởng nhiều đến kết quả)\")\n",
|
||
"if early_stop_epoch:\n",
|
||
" print(f\" Early stop tại epoch: {early_stop_epoch}\")\n",
|
||
"print(f\"{'═'*60}\")\n"
|
||
]
|
||
},
|
||
{
|
||
"cell_type": "code",
|
||
"execution_count": null,
|
||
"id": "bc690b92",
|
||
"metadata": {},
|
||
"outputs": [],
|
||
"source": [
|
||
"from sklearn.metrics import classification_report, confusion_matrix, accuracy_score\n",
|
||
"import seaborn as sns\n",
|
||
"\n",
|
||
"# ── Đánh giá trên tập test ─────────────────────────────────────────────────────\n",
|
||
"model.eval()\n",
|
||
"with torch.no_grad():\n",
|
||
" X_te_t = torch.FloatTensor(X_test_np).to(device)\n",
|
||
" logits = model(X_te_t)\n",
|
||
" y_pred = logits.argmax(1).cpu().numpy()\n",
|
||
"\n",
|
||
"acc = accuracy_score(y_test_np, y_pred)\n",
|
||
"print(f\"Test Accuracy : {acc:.4f} ({acc*100:.2f}%)\\n\")\n",
|
||
"print(classification_report(y_test_np, y_pred, digits=4))\n",
|
||
"\n",
|
||
"# ── Confusion matrix ────────────────────────────────────────────────────────────\n",
|
||
"class_names = list(label_mapping.keys())\n",
|
||
"cm = confusion_matrix(y_test_np, y_pred)\n",
|
||
"plt.figure(figsize=(9, 7))\n",
|
||
"sns.heatmap(cm, annot=True, fmt=\"d\", cmap=\"Purples\",\n",
|
||
" xticklabels=class_names, yticklabels=class_names)\n",
|
||
"plt.xlabel(\"Predicted\")\n",
|
||
"plt.ylabel(\"Actual\")\n",
|
||
"plt.title(\"Confusion Matrix — MobileNetV3 + LR-ASPP\")\n",
|
||
"plt.tight_layout()\n",
|
||
"plt.show()\n"
|
||
]
|
||
}
|
||
],
|
||
"metadata": {
|
||
"language_info": {
|
||
"name": "python"
|
||
}
|
||
},
|
||
"nbformat": 4,
|
||
"nbformat_minor": 5
|
||
}
|