seuilauto.c File Reference

automatic threshold More...

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Detailed Description

automatic threshold

Usage: seuilauto in.pgm L {min|max} [n] out.pgm

Description: Determine automatically a threshold thanks to the smoothed histogram of the picture (L : smoothing coefficient, 0<L<255). If n is given, it indicates the number of peaks on the histogram to be kept. If n isn't given, the threshold separates the picture in two approximatively equivalent groups of points. The argument <min|max> selects the part of the picture to be kept:

• min: Every pixel < smin gets value vmin and every pixel >= smax gets value vmax
• max: Every pixel > smin gets value vmin and every pixel <= smax gets value vmax

Types supported: byte 2d, byte 3d, int32_t 2d, int32_t 3d

Category: arith

Author:

Cedric Allene 2003