pbmclean

removes isolated pixels

Remove noise from bitmap

$ pbmclean [input.pbm] > [output.pbm]

Set minimum connected size

$ pbmclean -minneigh=[4] [input.pbm] > [output.pbm]

Flip black/white for cleaning

$ pbmclean -black [input.pbm] > [output.pbm]

pbmclean [options] [file]

pbmclean removes isolated pixels. Cleans up noisy bitmaps.
The tool removes speckles. Part of Netpbm.

FILE

Input PBM file.

-minneigh N

Minimum neighbor count.

-black

Clean black pixels.

-white

Clean white pixels.

Part of Netpbm. PBM format only. May remove small details.

pbmclean is part of Netpbm for cleaning bitmap images.