JPEG Encoder

This is a simple implementation of JPEG encoder. It will be merged into the CUDAimageProcessor in the future. Work in progress!

How does it work?

Ultimately, the encoder will follow a basic JPEG pipeline:

1. Import
2. RGB2YCbCr conversion
3. Chroma subsampling
4. DCT + quantization + zig-zag scan
5. Hufmann encoding
6. Delta encoding
7. Header
8. Final export

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Currently working:

1. Conversion between RGB and YCbCr color spaces
2. 4:1:1 chroma subsampling and desampling
3. DCT
4. Forward Zig-zag scan

TODO:

Encoding

• Huffmann + delta encoding
• Header handling (write)
• Exporting actual image

Decoding

• Importing actual image
• Header handling (read)
• Inverse Huffmann + delta encoding
• Inverse DCT

Miscellaneous

• Faster DCT algorithm
• 4:2:2 and 4:2:0 subsampling modes
• Parallel implementation