1. Non-numeric Data Representation
Image Data:
An image with a 512*256 resolution is a grid with 512 columns and 256 rows
Divide the screen into a grid of cells each referred to as a pixel
Pixel values and sizes depend on the type of the image
Black & white images: Either 0 (black) or 1 (white)
Grayscale images: An integer between 0 (black) and 255 (white)
Anything in between is gray (higher/lower values are closer to white/black)
Color images (RGB): Three values per pixel
Red, Green, Blue each as a value between 0 and 255 where 0 is BLACK and 255 is either R, G or B
Explore colors:
For any image, we only store the pixel values

3. Explore colors: http://web. stanford

4. An Image File
//RGB COLORED IMAGE

5. Non-numeric Data Representation
Digital movies are built from a number of images (or frames) that are displayed in a certain sequence at high speeds
30 images per second