47 lines
1017 B
Groff
47 lines
1017 B
Groff
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.TH IM_GREY 3 "10 May 1991"
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.SH NAME
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im_grey, im_fgrey, im_make_xy \- creates a grey scale
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.SH SYNOPSIS
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.B #include <vips/vips.h>
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.B int im_grey( image, xsize, ysize )
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.br
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.B IMAGE *image;
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.br
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.B int xsize, ysize;
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.B int im_fgrey( image, xsize, ysize )
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.br
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.B IMAGE *image;
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.br
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.B int xsize, ysize;
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.B int im_make_xy( image, xsize, ysize )
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.br
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.B IMAGE *image;
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.br
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.B int xsize, ysize;
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.SH DESCRIPTION
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.B im_grey(3)
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creates a one-band FMTUCHAR grey scale image of sizes xsize by
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ysize. The intensity varies from 0 (left) to 255 (right).
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.B im_fgrey(3)
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works as
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.B im_grey(3),
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except that the output image is FMTFLOAT,
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allowing pixel values from 0 (left) to 1.0 (right).
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.B im_make_xy(3)
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makes a two-band FMTUINT image where each pixel in band 0 has a value equal to
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the x coordinate, and each pixel in band 1 has a value equal to the y
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coordinate.
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.SH RETURN VALUE
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The function returns 0 on success and -1 on error.
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.SH SEE ALSO
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im_black(3)
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.SH COPYRIGHT
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Birkbeck College and the National Gallery, 1995
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