35 lines
1.0 KiB
Groff
35 lines
1.0 KiB
Groff
|
.TH IM_PROJECT 3 "10 April 2006"
|
||
|
|
.SH NAME
|
||
|
|
im_project \- find horizontal and vertical projections
|
||
|
|
.SH SYNOPSIS
|
||
|
|
#include <vips/vips.h>
|
||
|
|
|
||
|
|
int im_histplot(IMAGE *in, IMAGE *hout, IMAGE *vout)
|
||
|
|
|
||
|
|
.SH DESCRIPTION
|
||
|
|
.B im_project(3)
|
||
|
|
finds the horizontal and vertical projections of an image, that is, the sum of
|
||
|
|
each row and the sum of each column.
|
||
|
|
|
||
|
|
The
|
||
|
|
.B hout
|
||
|
|
result image is 1 x in->Ysize pixels, where each pixel is the sum of all the
|
||
|
|
pixels in that row of the input image.
|
||
|
|
The
|
||
|
|
.B vout
|
||
|
|
result image is in->Xsize x 1 pixels, where each pixel is the sum of all the
|
||
|
|
pixels in that column of the input image.
|
||
|
|
|
||
|
|
The output images are of the largest appropriate type for the input image: so
|
||
|
|
unsigned integer images produce UINT output, and so on. The output images have
|
||
|
|
the same number of bands as the input.
|
||
|
|
|
||
|
|
The operation does not work for complex images, or for coded images.
|
||
|
|
|
||
|
|
.SH RETURNED VALUE
|
||
|
|
The function returns 0 on success and -1 on error.
|
||
|
|
.SH SEE ALSO
|
||
|
|
im_histplot(3), im_histnorm(3), im_extract(3).
|
||
|
|
.SH COPYRIGHT
|
||
|
|
Imperial College, 2006
|