1. A computer-implemented method for compression of a digital image, comprising the steps of: generating bit blocks, each bit block comprising one or more bits; dividing a digital image into pixel-blocks, each pixel block including one or more pixels; mapping uniquely the bits to corresponding pixel blocks; setting the bits to a value indicative of a changed pixel within the corresponding pixel block or to a value indicative of no changed pixel within the corresponding pixel block; storing the pixel value of the changed pixel; storing bit-blocks including at least one bit set to the value indicative of the changed pixel within the corresponding pixel block; and discarding bit-blocks having all bits included therein set to the value indicative of the absence of a changed pixel within the corresponding pixel block.