IM_MPERCENT(3)

NAME

im_mpercent - find threshold corresponding to a percentage of an image values

SYNOPSIS

#include <vips/vips.h>

int im_mpercent( in, percent, thresh )
IMAGE *in;
int percent;
int *thresh;

DESCRIPTION

im_mpercent() returns (through the thresh parameter) the threshold above which there are percent values of the input image. If for example percent=.1, the number of pels of the input image with values greater than the returned int will correspond to 10% of all pels of the image.

The function is applied on one band FMTUCHAR images only. It can be used in order to threshold the scaled result of a filtering operation.

RETURN VALUE

The function returns 0 on success and -1 on error.

SEE ALSO

im_conv(3), im_zerox(3).

COPYRIGHT

N. Dessipris

AUTHOR

N. Dessipris - 14/05/1991

14 May 1991 IM_MPERCENT(3)