Convolving an Image

Convolve uses smoothing filters and sharpening filters to improve the appearance of grayscale images.

Smoothing filters reduce harshness and noise in your image. Sharpening filters make differences in shading more distinct.

Topics in this section

Reducing Harshness and Noise in an Image
You can use the smoothing filters to reduce the harshness and visual noise in a grayscale image.
Median Filter
You can use this filter to remove random visual noise in the image.
Making Differences in Shading More Distinct
You can use the sharpening filters on grayscale images to make differences in shading more distinct.
Lowpass Filtering
Lowpass filtering can lessen the severity of tone change by reducing high-frequency detail in an image in areas where pixel intensities change rapidly.
Highpass Filters
Highpass filters can enhance the edges and sharpen details in a grayscale image.
Edge Enhancements Filters
Shift and Difference Edge Enhancements Filters
Laplace Edge Enhancements Filters
Gradient Directional Edge Enhancements Filters
Matched Filter Edge Enhancements Filters
Using Bitonal Filters
You can use these filters to clean up bitonal images.
Changing Image Density
For editable image types, you can change the pixel density value, density units, or both.
Setting the Color Depth for an Image
You can alter the color depth of an image.

Parent topic: Image Processing