What are colour scanners and gray scale scanner?

Answer 1

Gray Scale: Using black and white and shades of gray, the scanner is able to translate the image into gray scales. Why would you use a gray scale scanner? If you plan to print on a black and white printer, it is most cost effective since color ink is so expensive. Text is best done on a grayscale scanner.

Color: A color scanner scans images in red, blue, and green shades. This scanner is more expensive in terms of final print output . A color scanner usually costs more than a gray scale scanner. If you plan on doing presentation work, work with color photographs, or any sort of task that requires a color output, then use a color scanner. With this scanner you can also choose options of scanning such as line art (scanning the image only in black or white), grayscale (black, white, and shades of gray, or color (shades of red, blue, and green).