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imagegd2> <imagefttext
Last updated: Sun, 25 Nov 2007

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imagegammacorrect

(PHP 4, PHP 5)

imagegammacorrect — Apply a gamma correction to a GD image

설명

bool imagegammacorrect ( resource $image , float $inputgamma , float $outputgamma )

Applies gamma correction to the given gd image given an input and an output gamma.

매개변수

font

내장 글꼴 1, 2, 3, 4, 5(큰 숫자가 큰 글꼴)나 imageloadfont()로 등록한 글꼴 식별자를 사용할 수 있습니다.

inputgamma

The input gamma

outputgamma

The output gamma

반환값

성공할 경우 TRUE를, 실패할 경우 FALSE를 반환합니다.



add a note add a note User Contributed Notes
imagegammacorrect
brian dot duncan at fife dot co dot uk
26-Jan-2002 05:46
Just thought I'd add how I used the gamma correction function (seeing as no-one had done so previously).  works great.

I used a form which has a parameter $GAMMA, so I usually type in something like 1.6

$image = ImageCreateFromJpeg ( "pictures/".$PICTURE2 ) ;
if ($GAMMA != "")
{
    $GammaFloat = (double) $GAMMA ;
    imagegammacorrect ($image, 1.0, $GammaFloat ) ;
        // now save the file
    imagejpeg ( $image, "pictures/"."$PICTURE2", 90 ) ;
}

imagegd2> <imagefttext
Last updated: Sun, 25 Nov 2007
 
 
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