From d7b2adc7ee55c37de215a886aaa757a62bad6068 Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Fri, 21 Feb 2014 03:32:28 +0100 Subject: comment about constrast function MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- info/blueshift.texinfo | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) (limited to 'info') diff --git a/info/blueshift.texinfo b/info/blueshift.texinfo index 0360956..8f7e92a 100644 --- a/info/blueshift.texinfo +++ b/info/blueshift.texinfo @@ -277,18 +277,24 @@ manipulate these curves: @table @code @item rgb_contrast(rgb) -Adjusts the contrast to @code{rgb}. +Adjusts the contrast to @code{rgb}. This +function assumes the black is 0, and white +is 1, so you should apply this before brightness. @item rgb_contrast(r, g, b) Adjusts the contrast to @code{r}, @code{g} and @code{b} on the red, green and blue curves, -respectively. +respectively. This function assumes the black is +0, and white is 1, so you should apply this +before brightness. @item cie_contrast(y) Adjusts the contrast to @code{y}. The function calculate the values by using the CIE xyY colour space instead of the sRGB -colour space. +colour space. This function assumes the black +is 0, and white is 1, so you should apply +this before brightness. @item rgb_brightness(rgb) Adjusts the brightness to @code{rgb}. -- cgit v1.2.3-70-g09d2