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5.8 Morphology

These menu items implement basic morphological operations. Images are zero for background and non-zero (usually 255) for object. Matricies are shown as 0, 1 and * for background, object and don't-care.

Dilate8, etc.
Four- and eight-connected erode and dilate.

Open, etc.
Simple pre-defined morphologies. Clean removes isolated single pixels.

Dilate, Erode
Dilate or erode with a matrix. Make a suitable matrix with New_matrix=>Morphology.

Dilate_multiple, etc.
Dilates a matrix with itself $n$ times.

Custom_morphology
Use this to make your own morphological operator. Select an image, click on Custom_morphology, open up the new row and adjust the parameters.

Find_profile
Handy for analysing the result of a morphology. Search in from the image edges for the first non-zero pixel, producing a profile histogram. One band 8-bit only. Open the row to adjust the search parameters.

Count_lines
Counts the average number of black-to-white transitions across or down an image. Open the row to change the search direction.

See also Count_set and Count_clear in the Statistics menu.


next up previous contents
Next: 5.9 Mosaic Up: 5. Image processing menus Previous: 5.7 Math   Contents
John Cupitt 2003-07-21