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im_mpercent - find threshold corresponding to a percentage of an image
values
#include <vips/vips.h>
int im_mpercent( in, percent, thresh
)
IMAGE *in;
int percent;
int *thresh;
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.
The function returns 0 on success and -1 on error.
im_conv(3)
,
im_zerox(3)
.
N. Dessipris
N. Dessipris - 14/05/1991
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