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revise docs for percent 

the greater than was backwards, thanks gil-c

see https://github.com/libvips/libvips/issues/1560
This commit is contained in:
John Cupitt 2020-02-21 11:53:55 +00:00
parent 54ff9dabf7
commit 44fb4044b6
1 changed files with 8 additions and 3 deletions
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11
libvips/histogram/percent.c
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@ -141,9 +141,14 @@ vips_percent_init( VipsPercent *percent )
* @...: %NULL-terminated list of optional named arguments
*
* vips_percent() returns (through the @threshold parameter) the threshold
* above which there are @percent values of @in. If for example percent=10, the
* number of pels of the input image with values greater than @threshold
* will correspond to 10% of all pels of the image.
* below which there are @percent values of @in. For example:
*
* |[
* $ vips precent k2.jpg 90
* 214
* ]|
*
* Means that 90% of pixels in `k2.jpg` have a value less than 214.
*
* The function works for uchar and ushort images only. It can be used
* to threshold the scaled result of a filtering operation.