DJ Mike's Tutorials: PHP

ImageMagick Functions

Imagick::contrastImage

Description:

bool contrastImage ( bool $sharpen )

Enhances the intensity differences between the lighter and darker elements of the image. Set sharpen to a value other than 0 to increase the image contrast otherwise the contrast is reduced. You can also use TRUE or FALSE.

Parameters:

sharpen

The sharpen value.

Return value

Returns TRUE on success.

Errors/Exceptions

Throws ImagickException on error.

Example

<?php
header("Content-type: image/jpeg");
$image = new Imagick("opossum.jpg"); 
$image->contrastImage(0);
echo $image;
?> 


<?php
header("Content-type: image/jpeg");
$image = new Imagick("opossum.jpg"); 
$image->contrastImage(1);
echo $image;
?>

^

Created by DJ Mike from Santa Barbara