Pixel in Digital Image Processing
A Pixel is the smallest element of an image.
Each pixel corresponds to one value at that point. In an 8-bit grayscale image, the value of the pixel is between 0 and 255.
The value of a pixel at any point corresponds to the intensity of the light photons striking at that point.
Each pixel stores a value proportional to the light intensity at that particular location.
A pixel is also known as PEL.
Total number of pixels = Number of rows * Number of columns
The number of (x,y) coordinate pairs also make up the total number of pixels.