Resilient image compression and decompression

An image processing data processing system comprising:

• a host computer with memory and at least one central processing unit (CPU);
• fixed storage storing an image;
• and,
• an image processing module comprising computer program instructions executing in the memory of the computer and adapted to perform:
• selecting an image in the fixed storage;
• loading the selected image into the memory;
• representing the loaded image in the memory by the CPU as an initial two-dimensional array of pixel values;
• transforming by the CPU the initial two-dimensional array of pixel values into a hierarchy of progressively axially decremented two-dimensional arrays of signs, the signs comprising either a positive indication or a negative indication, and a pair of one-dimensional values for each 2×2 array of signs amongst the decremented two-dimensional arrays of signs;
• and,
• storing by the CPU in the fixed storage each of the two-dimensional arrays of signs and each pair of one-dimensional values as a compressed form of the selected image.

A computer program product for image processing, the computer program product including a non-transitory computer readable storage medium having program instructions embodied therewith, the program instructions executable by a device to cause the device to perform a method including:

• selecting an image in fixed storage of a computer;
• loading the selected image into memory of the computer;
• representing the loaded image by a processor of the computer in the memory as an initial two-dimensional array of pixel values;
• transforming the initial two-dimensional array of pixel values into a hierarchy of progressively axially decremented two-dimensional arrays of signs and a pair of one-dimensional values for each 2×2 array of signs, the signs comprising either a positive indication or a negative indication, amongst the decremented two-dimensional arrays of signs;
• and,
• storing in the fixed storage each of the two-dimensional arrays of signs and each pair of one-dimensional values as a compressed form of the selected image.