What is a digital Image?
A digital image is represented as a rectangular array of numbers
Grey scale image – an image that is made up of different shades of grey
If we zoom into the region, the image is comprised of a rectangular grid of blocks called pixels. These pixels are represented with numbers called intensity values
In the real world, an image can take an unlimited number of values, but the digital image can take intensity values between 0 and 255
256 different intensity values to represent an image
Height is represented as rows
Width is represented as columns
Each pixel or intensity value has its index. For rows, it starts at the image’s top and moves down. For columns, it starts at the left of the image and moves towards right
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