README.md

# Object Folder Compression Scripts

This directory contains scripts to compress and decompress all object folders in the Objaverse dataset.

## Directory Structure

The dataset is organized as follows:
```
imgs/
├── 000-136/           # Scene directory
│   ├── <object_id>/   # Object folder containing images and data
│   │   ├── albedo_*.png
│   │   ├── color_*.png
│   │   ├── depth_*.exr
│   │   ├── normal_*.png
│   │   ├── orm_*.png
│   │   ├── object.ply
│   │   ├── camera.json
│   │   └── lighting.json
│   └── ...
├── 000-137/           # Another scene directory
└── ...
```

## Scripts

### zip_all_objects.sh
Compresses all object folders into individual .zip files with maximum compression.

**Usage:**
```bash
./zip_all_objects.sh
```

**What it does:**
- Iterates through all scene directories (000-136, 000-137, etc.)
- For each object folder within a scene, creates a compressed .zip file
- Uses maximum compression (-9) to minimize file sizes
- Skips objects that are already zipped
- Provides progress tracking and logging

**Output:**
- Each object folder gets compressed into `<object_id>.zip`
- Zip files are created in the same directory as the original object folder
- Progress is displayed during execution

### unzip_all_objects.sh
Decompresses all .zip files back to their original folder structure.

**Usage:**
```bash
./unzip_all_objects.sh
```

**What it does:**
- Iterates through all scene directories
- Extracts all .zip files back to their original object folders
- Skips extraction if the folder already exists
- Maintains the original directory structure
- Provides progress tracking and logging

## Example

Before compression:
```
000-136/
├── 62a4c16ac8084bf88aef8daba8f15249/
│   ├── albedo_00.png
│   ├── color_0_00.png
│   └── ...
└── 62a8be2e2d1b4e5c878304fc63cf3de6/
    ├── albedo_00.png
    └── ...
```

After compression:
```
000-136/
├── 62a4c16ac8084bf88aef8daba8f15249/     # Original folder (can be deleted after zipping)
├── 62a4c16ac8084bf88aef8daba8f15249.zip  # Compressed archive
├── 62a8be2e2d1b4e5c878304fc63cf3de6/
└── 62a8be2e2d1b4e5c878304fc63cf3de6.zip
```

## Notes

- The compression typically achieves significant space savings
- Each object folder contains ~250+ files (images, depth maps, etc.)
- The scripts are designed to be resumable - they skip already processed items
- Progress is logged to help track completion on large datasets
- Both scripts provide detailed progress information and error handling