User Guide

4 Click Median Filter.

5 Click Run Filter to filter the image(s).

6 Enter a filter (or matrix) size. This filter uses a matrix for smoothing the

pixels. For example, a filter size of 3 would filter each pixel by averaging

the values of the 8 surrounding pixels.

NOTE The filter size must be an odd number.

7 Click OK to apply the filter.

Quick Reference

Image ➤ Image Processing ➤ Convolve,Smoothing Filters

Raster Design Toolbar

Command Line

iconvolve

Dialog Box

Image Filters Dialog Box (page 324)

Making Differences in Shading More Distinct

You can use the sharpening filters on grayscale images to make differences in

shading more distinct.

Sharpening filters can enhance edges in the image. It may be necessary to use

these filters to extract the highest amount of useful data from a low resolution

scan.

For more information on the two types of sharpening filters (page 396), see

Highpass Filters (page 109) and Edge Enhancements Filters (page 110).

Raster Design uses Single Image Optimization (page 396) to speed up the editing

commands.

Convolving an Image | 107