A similar process happens with images. With images, however, there are two important differences.

The first difference is that the compressed size (and the display size) will vary much more between different devices, because we will convert the image to the appropriate bit depth. For example, look at a 150x150 color JPEG that is 16KB in its original size. If I synchronize it to a 216-color Palm III, it will end up about 15KB. If I synchronize it to a 16-gray Palm V, it will end up about 12KB. And if I synchronize it to a 4-gray Palm III, it will end up about 6KB.