diff --git a/adaptive-images.php b/adaptive-images.php
index 1d51420..54b0f8f 100755
--- a/adaptive-images.php
+++ b/adaptive-images.php
@@ -171,7 +171,10 @@ function generateImage($source_file, $cache_file, $resolution) {
     imagefilledrectangle($dst, 0, 0, $new_width, $new_height, $transparent);
   }
   
+  // invert the image to prevent atrifacts on white areas
+  imagefilter($src, IMG_FILTER_NEGATE);
   ImageCopyResampled($dst, $src, 0, 0, 0, 0, $new_width, $new_height, $width, $height); // do the resize in memory
+  imagefilter($dst, IMG_FILTER_NEGATE);
   ImageDestroy($src);
 
   // sharpen the image?
@@ -319,4 +322,4 @@ function generateImage($source_file, $cache_file, $resolution) {
 
 /* It exists as a source file, and it doesn't exist cached - lets make one: */
 $file = generateImage($source_file, $cache_file, $resolution);
-sendImage($file, $browser_cache);
\ No newline at end of file
+sendImage($file, $browser_cache);