Lecture
Image Compression
In terms of image compression, we use Huffman Coding.
YCbCr = Y is for luminance; Cb is for chrominance blue; Cr is for chrominance red
JPEG Encoder Steps:
- Preprocessing
- Dividing int NxN blocks
- Transform each block (Y, Cb, Cr) from spatial to frequency domain.
- Quantization
- Encoding (Huffman)
Forward Transformation
Transforms image/iamge blocks from
There are 3 transformation approaches:
- DFT
- DCT
- KLT