Image Processing The average filters are designed to remove noise. The kernel size can be 3, 5 or 7. The kernels used by the Image Processing Tool are shown in the following figure. Average Filtering Kernels Gaussian Filter The Gaussian operation acts like a low pass filter. This has the effect of blurring the image. Gaussian filters are designed to remove noise. The kernel size can be 3, 5 or 7. The kernels used by the Image Processing Tool are shown in the following figure. Gaussian Filtering Kernels Horizontal Prewitt Filter The Horizontal Prewitt operation acts like a gradient filter. This has the effect of highlighting horizontal edges (gradients) in the image.
The kernel size used is 3 and it is shown in the fol- lowing figure. The absolute clipping method is usually used with this filtering operation. ACEUser's Guide, 3.6.x, 18316-000 Rev A Page 515