Method and system for decoding encoded images and reducing the size of said images

A computer program product, embodied on a tangible computer-readable medium, comprising instructions, which when executed by a processor of a device, cause said device to decode a JPEG-encoded image, said instructions comprising instructions for:

• performing an entropy decoding operation on a compressed JPEG image to generate an image file made up of index blocks in a quantized, transform domain;
• reducing the image size in the quantized, transform domain to generate an image file made up of reduced index blocks in the quantized, transform domain prior to dequantization and inverse transform operations;
• dequantizing the reduced index blocks by multiplying each block by a quantization step size block to generate an image file made up of quantized coefficient blocks in the dequantized, transform domain;
• and
• performing an inverse transform operation to generate an image file of reduced pixel value blocks in the pixel domain.

A device for decoding and displaying an encoded image, comprising:

• a processor configured to execute instructions embodied on a computer-readable medium to provide:
• means for performing an entropy decoding operation on a compressed image to generate an image file made up of index blocks in a quantized, transform domain;
• means for reducing the image size in the quantized, transform domain to generate an image file made up of reduced index blocks in the quantized, transform domain prior to dequantization and inverse transform operations;
• means for dequantizing the reduced index blocks by multiplying each block by a quantization step size block to generate an image file made up of quantized coefficient blocks in the dequantized, transform domain;
• means performing an inverse transform operation to generate an image file of reduced pixel value blocks in the pixel domain;
• and
• a display one for displaying said image file.