MouseOK    Ribbon: Raster Filters>  4 Connected Contour

MouseOK    Ribbon: Raster Filters>  8 Connected Contour

MouseOK    Menu: RasterFiltersContour >  4-coupling

MouseOK    Menu: RasterFiltersContour >  8-coupling

KeyboardOK Command line: CONTOUR4

KeyboardOK Command line: CONTOUR8

   This functionality is available only in the Raster module.

Contour filters turn filled raster areas into single-pixel contours. In a four-connected contour, adjacent pixels can only be joined by the sides, in an eight-connected contour, contiguity is also allowed at the corners, so such contours look thinner.

The images below show the results of applying contour filters.

Parts of contours obtained with four-connected and eight-connected filtering

Select the images to be processed and run the command.

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