Imagecopyresampled Pixelation

[x1nick]

I am having trouble resizing images in php.

 

$new_image = imagecreatetruecolor($width, $height);
 #  imageantialias($new_image,true);
   imagecopyresampled($new_image,$this->image,0,0,$x,$y,$width,$height,$new_width,$new_height);

 

It works, just the end image is pixelated, tried with imageantialias and without. Still no joy.

Its mainly pixelation around things, eg person on white background. The white would be pixelated.

 

Some server info

GD Version bundled (2.0.34 compatible)

PHP Version 5.2.9

 

Any suggestions would be appreciated.

 

[x1nick]

Here is a example of a resized picture.

You can see around the arms the slight pixelation

 

[Alex]

You shouldn't be using JPEG format images if you don't want that to occur. This isn't a code issue. Idealy you should be using PNG or another lossless image format. JPEG isn't lossless so every time it's processed it tends to get messed up.

[Daniel0]

Try setting quality=100 when calling imagejpeg.

 

By the way, it's called JPEG artifacts, not pixelation. That's something different. Pixelation is when the individual pixels in a picture is visible to the human eye. That's not the case here. JPEG artifacts occur because JPEG is using lossy compression, like AlexWD said.