PHP/Graphics Image/imagefilter

IMG_FILTER_COLORIZE

   <source lang="html4strict">

<?php

   $image = imagecreatefrompng("space.png");
   imagefilter($image, IMG_FILTER_COLORIZE, 100, 0, 100);
   header("content-type: image/png");
   imagepng($image);
   imagedestroy($image);

?>

 </source>
   
  

IMG_FILTER_CONTRAST

   <source lang="html4strict">

<?php

   $image = imagecreatefrompng("space.png");
   imagefilter($image, IMG_FILTER_CONTRAST, 20);
   header("content-type: image/png");
   imagepng($image);
   imagedestroy($image);

?>

 </source>
   
  

IMG_FILTER_EDGEDETECT and IMG_FILTER_EMBOSS filters

   <source lang="html4strict">

<?php

   $image = imagecreatefrompng("space.png");
   imagefilter($image, IMG_FILTER_EDGEDETECT);
   imagefilter($image, IMG_FILTER_EMBOSS);
   header("content-type: image/png");
   imagepng($image);
   imagedestroy($image);

?>

 </source>
   
  

IMG_FILTER_GAUSSIAN_BLUR and IMG_FILTER_SELECTIVE_BLUR

   <source lang="html4strict">

<?php

   $image = imagecreatefrompng("space.png");
   imagefilter($image, IMG_FILTER_GAUSSIAN_BLUR);
   imagefilter($image, IMG_FILTER_SELECTIVE_BLUR);
   header("content-type: image/png");
   imagepng($image);
   imagedestroy($image);

?>

 </source>
   
  

IMG_FILTER_GRAYSCALE and IMG_FILTER_NEGATE

   <source lang="html4strict">

<?php

   $image = imagecreatefrompng("space.png");
   imagefilter($image, IMG_FILTER_GRAYSCALE);
   imagefilter($image, IMG_FILTER_NEGATE);
   header("content-type: image/png");
   imagepng($image);
   imagedestroy($image);

?>

 </source>
   
  

smooths the picture just a little

   <source lang="html4strict">

<?php

   $image = imagecreatefrompng("space.png");
   imagefilter($image, IMG_FILTER_SMOOTH, 6);
   header("content-type: image/png");
   imagepng($image);
   imagedestroy($image);

?>

 </source>
   
  

Special Effects Using imagefilter( ): lighten picture just a little:

   <source lang="html4strict">

<?php

   $image = imagecreatefrompng("space.png");
   imagefilter($image, IMG_FILTER_BRIGHTNESS, 50);
   header("content-type: image/png");
   imagepng($image);
   imagedestroy($image);

?>

 </source>