Removing “Speckle”

        Ribbon: Raster – Filters >  Speckle Remover

        Menu: Raster – Filters >  Speckle Remover…

 Command line: SpeckleRemover

      This functionality is available only in the Raster module.

The filter removes raster objects (isolated groups of pixels), the size of which is less than the specified value, and automatically estimates the size of spots in the image. This filter can be used after binarization or separation procedures to remove small raster objects from the resulting monochrome layer images.

Fragment of a monochrome raster obtained as a result of binarization

After “speckle” removal

8.      Select images to be processed and run the  Speckle Remover command.

9.      Enter the maximum size of raster objects to be deleted in the current units (left input field) or in points (right input field).

10.  Or check the Auto estimating box to let the filter estimate the size of the raster “speckle” before filtering.

To measure the size of a raster object on the screen, click  button and specify a point inside the object, or click  button and specify two points on the screen. The program will set the “speckle” size equal to the distance between the specified points.

11.  Click Apply.