Teach
With Bigshot |
How is an Image Processed?
Most image processing operations follow a simple procedure. Given an input image, the output image is calculated one pixel at a time. The color at each pixel in the output image is usually some mathematical combination of colors of pixels within a small neighborhood (window) centered on the same pixel in the input image. In some cases, instead of a neighborhood of pixels just the corresponding pixel in the input image is used. The demo in Figure 4 helps you visualize the above process. The output image is computed one pixel at a time from left to right and top to bottom. In this example, the color of each pixel is calculated using a small window of 3 × 3 pixels centered on the corresponding pixel in the input image. In the following sections, we will describe how three widely used image processing operations work.
|
