A collection of techniques for digital image processing based on mathematical morphology. Since these techniques rely only on the relative ordering of pixel values, not on their numerical values, they are especially suited to the processing of binary images and grayscale images whose light transfer function is not known.

Some morphological operations are:

• Erosion
• Dilation
• Opening
• Closing
• Shrinking
• Thinning
• Thickening
• Skeletonization
• Pruning
• Distance transform

By combining these operators one can obtain algorithms for many image processing tasks, such as feature detection, image segmentation, image sharpening, image filtering, and granulometry.

External links

• Java applet demonstration
• FILTERS : a free open source image processing library
• Fast morphological erosions, dilations, openings, and closings