Enable imagemagick default params for jpeg

serendipity_config.inc.php

@@ -498,14 +498,12 @@
     $serendipity['useInternalCache'] = true;
 }
 
-// You can set parameters which ImageMagick should use to generate the thumbnails
-// by default, thumbs will get a little more brightness and saturation (modulate)
-// an unsharp-mask (unsharp)
-// and quality-compression of 75% (default would be to use quality of original image)
 if (!isset($serendipity['imagemagick_thumb_parameters'])) {
-    $serendipity['imagemagick_thumb_parameters'] = '';
-    // Set a variable like below in your serendpity_config_local.inc.php
-    //$serendipity['imagemagick_thumb_parameters'] = '-modulate 105,140 -unsharp 0.5x0.5+1.0 -quality 75';
+    // Sets a subset of the old lighthouse recommended jpeg settings, plus an unsharp filter to improve
+    // image quality when resizing.
+    // 
+    // Set a variable like below in your serendpity_config_local.inc.php with your own settings
+    $serendipity['imagemagick_thumb_parameters'] = '-sampling-factor 4:2:0 -unsharp 0x0.75+0.75+0.008 -strip -quality 85 -interlace JPEG';
 }
 
 serendipity_plugin_api::hook_event('frontend_configure', $serendipity);