PHP - Imagick - 调整大小后质量不佳

Question

I have got this image (900x900, .jpg) - http://imgur.com/J1HArLS

I resized it to 290x290 and i got this - http://imgur.com/bZFyhxD

This is my PHP code :

$thumb_large = new \Imagick($path);
$thumb_large->setImageFormat( 'jpeg' );
$thumb_large->setResolution(900,900);
$thumb_large->setImageCompression(\Imagick::COMPRESSION_JPEG);
$thumb_large->setImageCompressionQuality(100);
$thumb_large->adaptiveResizeImage($value[0], $value[1]);
$thumb_large->writeImage(public_path() . '/uploads/images/'.$key.'/' . $file_name);

What am i doing wrong? The quality is horrible.

Answer 1

The quality is horrible.

From the manual:

"Adaptively resize image with data-dependent triangulation. Avoids blurring across sharp color changes. Most useful when used to shrink images slightly to a slightly smaller "web size"; may not look good when a full-sized image is adaptively resized to a thumbnail."

I suggest using http://php.net/manual/en/imagick.resizeimage.php with \Imagick::FILTER_LANCZOS