# Direct Coding ## 1. What is direct coding? - **def**::Certain amount of storage space are used to represent each pixel to code its color ```ad-ex 3 bits for each pixel, one for each primary color. Hence the result will be something like this ... ![[Pasted image 20220202205243.png]] ``` - For industry standart *direct coding,* we use 3 bytes/ 24 bits per pixel. - Thus ... - Each primary has 256 different intensity level - In this case total number of pixels are 256X256X256 = 16.7 million. - A notable special case of direct coding is the representation of black-and-white (bilevel) and gray-scale images, where the three primaries always have the same value and hence need not be coded separately. A black-and-white image requires only one bit per pixel, with bit value 0 representing black and 1 representing white.