FLC-based image compression method and device

A fixed length code (FLC)-based image encoding device for encoding a block containing a plurality of pixels, comprising:

• a memory storing a plurality of pixel values of said pixels;
• a comparison circuit, coupled to said memory, and configured to determine a first representative pixel and a second representative pixel from said pixels according to said pixel values of said pixels,
• a calculation circuit, coupled to said memory and said comparison circuit, for performing steps of:
• generating, by interpolation, a plurality of interpolated pixels according to said first representative pixel and said second representative pixel;
• generating an index value for each of said pixels according to said first representative pixel, said second representative pixel, and said interpolated pixels;
• adjusting said first representative pixel and said second representative pixel to generate a first adjusted representative pixel and a second adjusted representative pixel;
• and
• using said index values and complete pixel values or quantized pixel values of said first adjusted representative pixel and said second adjusted representative pixel to represent said block.

A fixed length code (FLC)-based image encoding device for encoding a block containing a plurality of pixels, comprising:

• a memory storing a plurality of pixel values of said pixels;
• a comparison circuit, coupled to said memory, and configured to determine a first representative pixel and a second representative pixel from said pixels according to said pixel values of said pixels,
• a calculation circuit, coupled to said memory and said comparison circuit, for performing steps of:
• generating, by interpolation, a plurality of interpolated pixels according to said first representative pixel and said second representative pixel;
• generating an index value for each of said pixels, each index value corresponding to one of said first representative pixel, said second representative pixel, and said interpolated pixels;
• adjusting said first representative pixel and said second representative pixel to generate a first adjusted representative pixel and a second adjusted representative pixel;
• and
• using said index values and complete pixel values or quantized pixel values of said first adjusted representative pixel and said second adjusted representative pixel to represent said block.