© 2004 Computer Academic Underground
Digital Imagery Basics
*Images vary between resolutions and size of color palette
*The number of unique colors an image can display is represented in it’s bits-per-pixel (BPP) value
*8 bits per pixel == 256 colors available
*24 bits per pixel == 16,777,216 colors available
•Before we get into digitally embedding a message into an image’s data, we need to cover some basics.
•Images vary between resolutions and how many colors they can display and as such some images are better suited to steganography than others.
•An images BPP value tells us how many colors an image can display.