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