25 lines
681 B
Groff
25 lines
681 B
Groff
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.TH GAMMA 3 "10 May 1991"
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.SH NAME
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im_gammacorrect \- carry out gamma correction
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.SH SYNOPSIS
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#include <vips/vips.h>
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int im_gammacorrect(in, out, exponent)
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.br
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IMAGE *in, *out;
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.br
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double exponent;
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.SH DESCRIPTION
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im_gammacorrect performs gamma correction to in. The result in written in out.
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The correction is carried out by creating a lookup table using the double
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exponent and mapping in through it. The exponent is applied on a ramp lut and
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the resultant lut is scaled. All channels of im are mapped through the lookup
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table.
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.SH SEE ALSO
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im_histgr(3), im_heq(3), im_histeq(3), im_identity(3), im_maplut(3)
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.SH COPYRIGHT
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N. Dessipris
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.SH AUTHOR
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N. Dessipris \- 10/05/1991
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