| .TH IM_LRMERGE 3 "13 May 1991" |
| .SH NAME |
| im_lrmerge, im_tbmerge, im_lrsmerge, im_tbsmerge, im_lrmergeb, im_tbmergeb \- merges two images with a given dx and dy |
| .SH SYNOPSIS |
| #include <vips/vips.h> |
| |
| int im_lrmerge( ref, sec, out, dx, dy, mwidth ) |
| .br |
| IMAGE *ref, *sec, *out; |
| .br |
| int dx, dy; |
| .br |
| int mwidth; |
| |
| int im_tbmerge( ref, sec, out, dx, dy, mwidth ) |
| .br |
| IMAGE *ref, *sec, *out; |
| .br |
| int dx, dy; |
| .br |
| int mwidth; |
| |
| .SH DESCRIPTION |
| im_lrmerge() and im_tbmerge() merge the images held by the image descriptors |
| reference and secondary (ref and sec) according to the values dx and dy. dx |
| and dy give the displacement of sec relative to ref. The result is written on |
| the image descriptor out. The program carries out a smooth merge using a |
| raised cosine function. Both work for any image type, including LABPACK. |
| |
| The functions treat pixels with the value zero as "transparent", that is, |
| zero pixels in the overlap area do not contribute to the merge. This makes it |
| possible to join non-rectangular images. |
| |
| The "mwidth" parameter limits the maximum width (or height) of the blend area. |
| A value of "-1" means "unlimited". All other negative values are errors. |
| |
| .SH RETURN VALUE |
| Both functions return 0 on success and -1 on error. |
| .SH SEE ALSO |
| im_lrmosaic(3), im_tbmosaic(3), im_match_linear(3). |
