1. A method, comprising: determining a most frequently occurring color in a color-mapped image having pixels with values that are indices into a color table; designating the most frequently occurring color as a background color; determining, for the pixels of the image, whether a pixel of the pixels exhibits a color value equal to a value associated with the most frequently occurring color; setting a flag for the pixel to a background value corresponding to a background pixel in response to the color value of the pixel being equal to the value associated with the most frequently occurring color; setting the flag for the pixel to a foreground value corresponding to a foreground pixel in response to the color value of the pixel being different than the value associated with the most frequently occurring color; compressing respective flags for the pixels of the color-mapped image; and compressing color index information for foreground pixels of the color-mapped image.