Image processing system
An image processing system including an image encoder and image decoding system is provided. The image encoder system includes an image decomposer, a block encoder, and an encoded image composer. The image decomposer decomposes the image into blocks. The block encoder, which includes a selection module, a codeword generation module and a construction module, processes the blocks. Specifically, the selection module computes a set of parameters from image data values of a set of image elements in the image block. The codeword generation module generates codewords, which the construction module uses to derive a set of quantized image data values. The construction module then maps each of the image element's original image data values to an index to one of the derived image data values. The image decoding system reverses this process to reorder decompressed image blocks in an output data file.
1. An image decoder engine for decoding an encoded image data file, comprising:
an encoded image decomposer for decomposing the encoded image data file into a modified header and at least one compressed image block, each image block having at least one associated codeword and a plurality of image elements associated with an index value; and
at least one block decoder coupled to the encoded image decomposer for decompressing the at least one compressed image block into at least one decompressed image block by generating a set of quantized image data values and mapping the index value to a quantized image data value from the set of quantized image data values, the at least one block decoder further comprising,
at least one decoder configured for decompressing each of the at least one compressed image block to generate colors for each of the at least one compressed image block.
2. The image decoder engine of claim 1 further comprising an image composer configured for ordering the at least one decompressed image blocks in an output data file.
3. The image decoder engine of claim 1 wherein the set of quantized image data values comprise the at least one associated codeword and at least one image data value derived from the at least one associated codeword.
4. The image decoder engine of claim 1 further comprising a header converter coupled to the encoded image decomposer and configured for converting the modified header into an output header.
5. The image decoder engine of claim 4 wherein the image composer orders the at least one decompressed image block and the output header into a data file.
6. The image decoder engine of claim 1 wherein the at least one block decoder further comprises a block type detector configured for determining a block type for each of the at least one compressed image block based on the at least one associated codeword.
7. The image decoder engine of claim 1 wherein the decoder is configured to decompress each of the at least one compressed image block based on a block type.
8. The image decoder engine of claim 1 wherein the at least one block decoder further comprises an output selector for outputting the at least one decompressed image block.