| .TH IM_PROJECT 3 "10 April 2006" |
| .SH NAME |
| im_project \- find horizontal and vertical projections |
| .SH SYNOPSIS |
| #include <vips/vips.h> |
| |
| int im_project(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 |
