Methods and systems for compression of digital images (still or motion
sequences) are provided wherein predetermined criteria may be used to
identify a plurality of areas of interest in the image, and each area of
interest is encoded with a corresponding quality level (Q-factor). In
particular, the predetermined criteria may be derived from measurements
of where a viewing audience is focusing their gaze (area of interest). In
addition, the predetermined criteria may be used to create areas of
interest in an image in order to focus an observer's attention to that
area. Portions of the image outside of the areas of interest are encoded
at a lower quality factor and bit rate. The result is higher compression
ratios without adversely affecting a viewer's perception of the overall
quality of the image.