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Imagick::brightnessContrastImage — Description
$brightness
, string $contrast
[, string $CHANNEL
= Imagick::CHANNEL_DEFAULT
] )Change the brightness and/or contrast of an image. It converts the brightness and contrast parameters into slope and intercept and calls a polynomical function to apply to the image.
brightness
contrast
CHANNEL
Example #1 Imagick::brightnessContrastImage()
<?php
function brightnessContrastImage ( $imagePath , $brightness , $contrast , $channel ) {
$imagick = new \ Imagick ( realpath ( $imagePath ));
$imagick -> brightnessContrastImage ( $brightness , $contrast , $channel );
header ( "Content-Type: image/jpg" );
echo $imagick -> getImageBlob ();
}
?>