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{
"cells": [
{
"cell_type": "code",
"execution_count": 7,
"id": "ae9bc87a",
"metadata": {},
"outputs": [],
"source": [
"from datasets import load_dataset\n",
"import datasets\n",
"from tqdm.notebook import tqdm"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "d5bc67fe",
"metadata": {},
"outputs": [],
"source": [
"ds = load_dataset(\"chainyo/rvl-cdip\")"
]
},
{
"cell_type": "markdown",
"id": "85f49eeb",
"metadata": {},
"source": [
"## Creates the \"rvl_cdip_data\" dir"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "936deafa",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"π Starting RVL-CDIP Downloader (Disk Optimized)\n",
" Target Folder: /Users/arpit-zstch1557/Projects/document-classification/rvl_cdip_data\n",
" Workers: 12\n",
" Loading dataset structure from Hugging Face...\n"
]
},
{
"data": {
"application/vnd.jupyter.widget-view+json": {
"model_id": "0a79c4079dd44915af9193231077adc9",
"version_major": 2,
"version_minor": 0
},
"text/plain": [
"Resolving data files: 0%| | 0/119 [00:00<?, ?it/s]"
]
},
"metadata": {},
"output_type": "display_data"
},
{
"data": {
"application/vnd.jupyter.widget-view+json": {
"model_id": "105602455af94c04a85e8dd5eed8e1bb",
"version_major": 2,
"version_minor": 0
},
"text/plain": [
"Loading dataset shards: 0%| | 0/64 [00:00<?, ?it/s]"
]
},
"metadata": {},
"output_type": "display_data"
},
{
"name": "stdout",
"output_type": "stream",
"text": [
" Found 16 categories.\n",
" Configuring dataset for safe raw access...\n",
"\n",
"π¦ Processing SPLIT: TRAIN\n"
]
},
{
"data": {
"application/vnd.jupyter.widget-view+json": {
"model_id": "59511ab60fd047758ad0d5671f5f6789",
"version_major": 2,
"version_minor": 0
},
"text/plain": [
"Saving train (num_proc=12): 0%| | 0/319999 [00:00<?, ? examples/s]"
]
},
"metadata": {},
"output_type": "display_data"
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"\n",
"π¦ Processing SPLIT: VAL\n"
]
},
{
"data": {
"application/vnd.jupyter.widget-view+json": {
"model_id": "19ac18978db046e0aea0cbf7da2748ba",
"version_major": 2,
"version_minor": 0
},
"text/plain": [
"Saving val (num_proc=12): 0%| | 0/40000 [00:00<?, ? examples/s]"
]
},
"metadata": {},
"output_type": "display_data"
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"\n",
"π¦ Processing SPLIT: TEST\n"
]
},
{
"data": {
"application/vnd.jupyter.widget-view+json": {
"model_id": "890739f28bd2495bacc55ea33099c2f2",
"version_major": 2,
"version_minor": 0
},
"text/plain": [
"Saving test (num_proc=12): 0%| | 0/40000 [00:00<?, ? examples/s]"
]
},
"metadata": {},
"output_type": "display_data"
},
{
"name": "stderr",
"output_type": "stream",
"text": [
"/Users/arpit-zstch1557/miniconda3/envs/lab_env/lib/python3.13/site-packages/PIL/TiffImagePlugin.py:949: UserWarning: Corrupt EXIF data. Expecting to read 2 bytes but only got 0. \n",
" warnings.warn(str(msg))\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"text": [
"[Worker] Skipping corrupt image ID 34965 in test: cannot identify image file <_io.BytesIO object at 0x371a331a0>\n",
"\n",
"β
Download and Extraction Complete!\n",
" You can now load this in PyTorch using:\n",
" datasets.ImageFolder(root='rvl_cdip_data/train')\n"
]
}
],
"source": [
"import os\n",
"import io\n",
"from datasets import load_dataset, Image as HFImage\n",
"from PIL import Image, UnidentifiedImageError\n",
"\n",
"OUTPUT_DIR = \"rvl_cdip_data\" # Where data will be saved\n",
"NUM_PROC = os.cpu_count() # Use all available CPU cores\n",
"SPLITS = ['train', 'val', 'test'] # Splits to process\n",
"\n",
"def save_image_worker(batch, indices, split_name, output_root, idx_to_class):\n",
" # Unpack batch\n",
" images_data = batch['image'] \n",
" labels = batch['label']\n",
" \n",
" for i, (img_data, label_idx, original_idx) in enumerate(zip(images_data, labels, indices)):\n",
" try:\n",
" # Determine Paths\n",
" class_name = idx_to_class[label_idx]\n",
" target_folder = os.path.join(output_root, split_name, class_name)\n",
" filename = f\"{original_idx}.png\"\n",
" file_path = os.path.join(target_folder, filename)\n",
" \n",
" if os.path.exists(file_path) and os.path.getsize(file_path) > 0:\n",
" continue\n",
" \n",
" # Create Directory\n",
" os.makedirs(target_folder, exist_ok=True)\n",
" \n",
" # 5. Decode Image Safely\n",
" image_bytes = img_data['bytes']\n",
" with Image.open(io.BytesIO(image_bytes)) as img:\n",
" if img.mode != 'RGB':\n",
" img = img.convert('RGB')\n",
" img.save(file_path)\n",
"\n",
" except (UnidentifiedImageError, OSError, ValueError) as e:\n",
" print(f\"[Worker] Skipping corrupt image ID {original_idx} in {split_name}: {e}\")\n",
" \n",
" return {}\n",
"\n",
"def main():\n",
" print(f\"π Starting RVL-CDIP Downloader (Disk Optimized)\")\n",
" print(f\" Target Folder: {os.path.abspath(OUTPUT_DIR)}\")\n",
" print(f\" Workers: {NUM_PROC}\")\n",
" \n",
" # Load Dataset\n",
" print(\" Loading dataset structure from Hugging Face...\")\n",
" dataset = load_dataset(\"chainyo/rvl-cdip\") \n",
"\n",
" # Setup Class Mapping\n",
" labels_feature = dataset['train'].features['label']\n",
" idx_to_class = {idx: name for idx, name in enumerate(labels_feature.names)}\n",
" print(f\" Found {len(idx_to_class)} categories.\")\n",
"\n",
" # Disable Auto-Decoding (Prevents crashes on corrupt files)\n",
" print(\" Configuring dataset for safe raw access...\")\n",
" for split in SPLITS:\n",
" dataset[split] = dataset[split].cast_column(\"image\", HFImage(decode=False))\n",
"\n",
" # Execute Parallel Processing\n",
" for split in SPLITS:\n",
" print(f\"\\nπ¦ Processing SPLIT: {split.upper()}\")\n",
" \n",
" # We use remove_columns to ensure the output dataset is empty\n",
" # This prevents the 50GB duplicate cache file.\n",
" dataset[split].map(\n",
" save_image_worker,\n",
" batched=True,\n",
" batch_size=100,\n",
" with_indices=True,\n",
" num_proc=NUM_PROC,\n",
" remove_columns=dataset[split].column_names, \n",
" fn_kwargs={\n",
" 'split_name': split,\n",
" 'output_root': OUTPUT_DIR,\n",
" 'idx_to_class': idx_to_class\n",
" },\n",
" desc=f\"Saving {split}\"\n",
" )\n",
"\n",
" print(f\"\\nβ
Download and Extraction Complete!\")\n",
" print(f\" You can now load this in PyTorch using:\")\n",
" print(f\" datasets.ImageFolder(root='{OUTPUT_DIR}/train')\")\n",
"\n",
"if __name__ == \"__main__\":\n",
" main()"
]
},
{
"cell_type": "markdown",
"id": "c8530c8e",
"metadata": {},
"source": [
"## Checking the Data Imbalance in ds (from HF)"
]
},
{
"cell_type": "code",
"execution_count": 8,
"id": "2785360c",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"SPLIT CLASS NAME COUNT STATUS\n",
"------------------------------------------------------------\n",
"TRAIN advertisement 19963 β MISMATCH (Exp: 20000)\n",
"TRAIN budget 20010 β MISMATCH (Exp: 20000)\n",
"TRAIN email 19954 β MISMATCH (Exp: 20000)\n",
"TRAIN file folder 20022 β MISMATCH (Exp: 20000)\n",
"TRAIN form 19957 β MISMATCH (Exp: 20000)\n",
"TRAIN handwritten 20034 β MISMATCH (Exp: 20000)\n",
"TRAIN invoice 19947 β MISMATCH (Exp: 20000)\n",
"TRAIN letter 20106 β MISMATCH (Exp: 20000)\n",
"TRAIN memo 19975 β MISMATCH (Exp: 20000)\n",
"TRAIN news article 20011 β MISMATCH (Exp: 20000)\n",
"TRAIN presentation 20043 β MISMATCH (Exp: 20000)\n",
"TRAIN questionnaire 20048 β MISMATCH (Exp: 20000)\n",
"TRAIN resume 20036 β MISMATCH (Exp: 20000)\n",
"TRAIN scientific publication 19902 β MISMATCH (Exp: 20000)\n",
"TRAIN scientific report 19994 β MISMATCH (Exp: 20000)\n",
"TRAIN specification 19997 β MISMATCH (Exp: 20000)\n",
"------------------------------------------------------------\n",
"VAL advertisement 2522 β MISMATCH (Exp: 2500)\n",
"VAL budget 2485 β MISMATCH (Exp: 2500)\n",
"VAL email 2530 β MISMATCH (Exp: 2500)\n",
"VAL file folder 2451 β MISMATCH (Exp: 2500)\n",
"VAL form 2537 β MISMATCH (Exp: 2500)\n",
"VAL handwritten 2434 β MISMATCH (Exp: 2500)\n",
"VAL invoice 2576 β MISMATCH (Exp: 2500)\n",
"VAL letter 2430 β MISMATCH (Exp: 2500)\n",
"VAL memo 2533 β MISMATCH (Exp: 2500)\n",
"VAL news article 2526 β MISMATCH (Exp: 2500)\n",
"VAL presentation 2468 β MISMATCH (Exp: 2500)\n",
"VAL questionnaire 2517 β MISMATCH (Exp: 2500)\n",
"VAL resume 2426 β MISMATCH (Exp: 2500)\n",
"VAL scientific publication 2526 β MISMATCH (Exp: 2500)\n",
"VAL scientific report 2508 β MISMATCH (Exp: 2500)\n",
"VAL specification 2531 β MISMATCH (Exp: 2500)\n",
"------------------------------------------------------------\n",
"TEST advertisement 2515 β MISMATCH (Exp: 2500)\n",
"TEST budget 2505 β MISMATCH (Exp: 2500)\n",
"TEST email 2516 β MISMATCH (Exp: 2500)\n",
"TEST file folder 2527 β MISMATCH (Exp: 2500)\n",
"TEST form 2506 β MISMATCH (Exp: 2500)\n",
"TEST handwritten 2532 β MISMATCH (Exp: 2500)\n",
"TEST invoice 2477 β MISMATCH (Exp: 2500)\n",
"TEST letter 2464 β MISMATCH (Exp: 2500)\n",
"TEST memo 2492 β MISMATCH (Exp: 2500)\n",
"TEST news article 2463 β MISMATCH (Exp: 2500)\n",
"TEST presentation 2489 β MISMATCH (Exp: 2500)\n",
"TEST questionnaire 2435 β MISMATCH (Exp: 2500)\n",
"TEST resume 2537 β MISMATCH (Exp: 2500)\n",
"TEST scientific publication 2572 β MISMATCH (Exp: 2500)\n",
"TEST scientific report 2498 β MISMATCH (Exp: 2500)\n",
"TEST specification 2472 β MISMATCH (Exp: 2500)\n",
"------------------------------------------------------------\n"
]
}
],
"source": [
"from collections import Counter\n",
"import pandas as pd\n",
"\n",
"#Setup\n",
"splits = ['train', 'val', 'test']\n",
"label_feature = ds['train'].features['label']\n",
"int2str = label_feature.int2str \n",
"\n",
"print(f\"{'SPLIT':<10} {'CLASS NAME':<25} {'COUNT':<10} {'STATUS'}\")\n",
"print(\"-\" * 60)\n",
"\n",
"for split in splits:\n",
" # Get all labels (Load only the label column into memory)\n",
" # This is instant compared to loading images\n",
" labels = ds[split]['label']\n",
" \n",
" # Count frequencies\n",
" counts = Counter(labels)\n",
" \n",
" # Analyze each class\n",
" # We sort by class ID to keep it organized\n",
" for label_id in sorted(counts.keys()):\n",
" count = counts[label_id]\n",
" class_name = int2str(label_id)\n",
" \n",
" # Define Expected Counts based on the Paper\n",
" # Train: 320k / 16 = 20,000\n",
" # Test/Val: 40k / 16 = 2,500\n",
" if split == 'train':\n",
" expected = 20000\n",
" else:\n",
" expected = 2500\n",
" \n",
" status = \"β
OK\" if count == expected else f\"β MISMATCH (Exp: {expected})\"\n",
" \n",
" print(f\"{split.upper():<10} {class_name:<25} {count:<10} {status}\")\n",
" \n",
" print(\"-\" * 60) "
]
},
{
"cell_type": "markdown",
"id": "5f7b75a2",
"metadata": {},
"source": [
"## Checking the data imbalance in \"rvl_cdip_data\" dir"
]
},
{
"cell_type": "code",
"execution_count": 9,
"id": "059bfaa5",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"π Scanning directory: /Users/arpit-zstch1557/Projects/document-classification/rvl_cdip_data\n",
"SPLIT CLASS NAME FILES STATUS\n",
"-----------------------------------------------------------------\n",
"TRAIN advertisement 19963 β MISMATCH (Exp: 20000)\n",
"TRAIN budget 20010 β MISMATCH (Exp: 20000)\n",
"TRAIN email 19954 β MISMATCH (Exp: 20000)\n",
"TRAIN file folder 20022 β MISMATCH (Exp: 20000)\n",
"TRAIN form 19957 β MISMATCH (Exp: 20000)\n",
"TRAIN handwritten 20034 β MISMATCH (Exp: 20000)\n",
"TRAIN invoice 19947 β MISMATCH (Exp: 20000)\n",
"TRAIN letter 20106 β MISMATCH (Exp: 20000)\n",
"TRAIN memo 19975 β MISMATCH (Exp: 20000)\n",
"TRAIN news article 20011 β MISMATCH (Exp: 20000)\n",
"TRAIN presentation 20043 β MISMATCH (Exp: 20000)\n",
"TRAIN questionnaire 20048 β MISMATCH (Exp: 20000)\n",
"TRAIN resume 20036 β MISMATCH (Exp: 20000)\n",
"TRAIN scientific publication 19902 β MISMATCH (Exp: 20000)\n",
"TRAIN scientific report 19994 β MISMATCH (Exp: 20000)\n",
"TRAIN specification 19997 β οΈ OK (Off by 3)\n",
"-----------------------------------------------------------------\n",
"VAL advertisement 2522 β MISMATCH (Exp: 2500)\n",
"VAL budget 2485 β MISMATCH (Exp: 2500)\n",
"VAL email 2530 β MISMATCH (Exp: 2500)\n",
"VAL file folder 2451 β MISMATCH (Exp: 2500)\n",
"VAL form 2537 β MISMATCH (Exp: 2500)\n",
"VAL handwritten 2434 β MISMATCH (Exp: 2500)\n",
"VAL invoice 2576 β MISMATCH (Exp: 2500)\n",
"VAL letter 2430 β MISMATCH (Exp: 2500)\n",
"VAL memo 2533 β MISMATCH (Exp: 2500)\n",
"VAL news article 2526 β MISMATCH (Exp: 2500)\n",
"VAL presentation 2468 β MISMATCH (Exp: 2500)\n",
"VAL questionnaire 2517 β MISMATCH (Exp: 2500)\n",
"VAL resume 2426 β MISMATCH (Exp: 2500)\n",
"VAL scientific publication 2526 β MISMATCH (Exp: 2500)\n",
"VAL scientific report 2508 β MISMATCH (Exp: 2500)\n",
"VAL specification 2531 β MISMATCH (Exp: 2500)\n",
"-----------------------------------------------------------------\n",
"TEST advertisement 2515 β MISMATCH (Exp: 2500)\n",
"TEST budget 2505 β MISMATCH (Exp: 2500)\n",
"TEST email 2516 β MISMATCH (Exp: 2500)\n",
"TEST file folder 2527 β MISMATCH (Exp: 2500)\n",
"TEST form 2506 β MISMATCH (Exp: 2500)\n",
"TEST handwritten 2532 β MISMATCH (Exp: 2500)\n",
"TEST invoice 2477 β MISMATCH (Exp: 2500)\n",
"TEST letter 2464 β MISMATCH (Exp: 2500)\n",
"TEST memo 2492 β MISMATCH (Exp: 2500)\n",
"TEST news article 2463 β MISMATCH (Exp: 2500)\n",
"TEST presentation 2489 β MISMATCH (Exp: 2500)\n",
"TEST questionnaire 2435 β MISMATCH (Exp: 2500)\n",
"TEST resume 2537 β MISMATCH (Exp: 2500)\n",
"TEST scientific publication 2571 β MISMATCH (Exp: 2500)\n",
"TEST scientific report 2498 β οΈ OK (Off by 2)\n",
"TEST specification 2472 β MISMATCH (Exp: 2500)\n",
"-----------------------------------------------------------------\n",
"\n",
"Analysis Complete.\n"
]
}
],
"source": [
"import os\n",
"import pandas as pd\n",
"\n",
"# Configuration\n",
"DATA_DIR = \"rvl_cdip_data\" # Your directory name\n",
"splits = ['train', 'val', 'test']\n",
"\n",
"print(f\"π Scanning directory: {os.path.abspath(DATA_DIR)}\")\n",
"print(f\"{'SPLIT':<10} {'CLASS NAME':<25} {'FILES':<10} {'STATUS'}\")\n",
"print(\"-\" * 65)\n",
"\n",
"stats = []\n",
"\n",
"for split in splits:\n",
" split_dir = os.path.join(DATA_DIR, split)\n",
" \n",
" # Check if split folder exists\n",
" if not os.path.exists(split_dir):\n",
" print(f\"β Missing folder: {split}\")\n",
" continue\n",
" \n",
" # Get all class folders (sorted for consistency)\n",
" try:\n",
" classes = sorted([d for d in os.listdir(split_dir) if os.path.isdir(os.path.join(split_dir, d))])\n",
" except OSError:\n",
" print(f\"β Error reading {split} directory.\")\n",
" continue\n",
"\n",
" for cls in classes:\n",
" cls_path = os.path.join(split_dir, cls)\n",
" \n",
" # Count actual files (ignoring hidden files like .DS_Store)\n",
" file_count = len([\n",
" name for name in os.listdir(cls_path) \n",
" if os.path.isfile(os.path.join(cls_path, name)) \n",
" and not name.startswith('.')\n",
" ])\n",
" \n",
" # Determine Expected Count based on the paper\n",
" if split == 'train':\n",
" expected = 20000 \n",
" else:\n",
" expected = 2500\n",
"\n",
" # Status Check\n",
" if file_count == expected:\n",
" status = \"β
OK\"\n",
" elif abs(file_count - expected) < 5: \n",
" # If off by 1-4 files (like the corrupt one we skipped), it's acceptable\n",
" status = f\"β οΈ OK (Off by {expected - file_count})\"\n",
" else:\n",
" status = f\"β MISMATCH (Exp: {expected})\"\n",
" \n",
" print(f\"{split.upper():<10} {cls:<25} {file_count:<10} {status}\")\n",
" \n",
" print(\"-\" * 65)\n",
"\n",
"print(\"\\nAnalysis Complete.\")"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "4ef697a2",
"metadata": {},
"outputs": [],
"source": []
}
],
"metadata": {
"kernelspec": {
"display_name": "lab_env",
"language": "python",
"name": "python3"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
"version": 3
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.13.11"
}
},
"nbformat": 4,
"nbformat_minor": 5
}
|