An 800 × 600 image with 24-bit color depth needs to be stored on disc. Even though the image might contain 224 different colors, only 256 colors are actually present. This image could be encoded by means of a table (palette) of 256 24-bit elements and, for each pixel, an index of its RGB value in the table. This type of encoding is usually called Color Look-Up Table (CLUT) encoding.
a. How many bytes are needed to store the image as raw information?
b. How many bytes are needed to store the image using CLUT encoding?
c. What's the compression ratio achieved by using this simple encoding method?