IMG_FILTER_GRAYSCALE and IMG_FILTER_NEGATE : imagefilter « Graphics Image « PHP

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PHP » Graphics Image » imagefilter

IMG_FILTER_GRAYSCALE and IMG_FILTER_NEGATE


 

<?php

    $image = imagecreatefrompng("space.png");

    imagefilter($image, IMG_FILTER_GRAYSCALE);

    imagefilter($image, IMG_FILTER_NEGATE);

    header("content-type: image/png");

    imagepng($image);

    imagedestroy($image);

?>

Related examples in the same category

1.	Special Effects Using imagefilter( ): lighten picture just a little:
2.	IMG_FILTER_COLORIZE
3.	IMG_FILTER_CONTRAST
4.	IMG_FILTER_EDGEDETECT and IMG_FILTER_EMBOSS filters
5.	IMG_FILTER_GAUSSIAN_BLUR and IMG_FILTER_SELECTIVE_BLUR
6.	smooths the picture just a little

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