I use the following code to create a thumbnail on the site:
$small_image = new Imagick($large_path."/".$pic['image']);
$small_image->thumbnailImage(100, 0);
$small_image->writeImage($small_path."/".$pic['image']);
It sets it's own quality and I tried adding
$small_image->setCompression(imagick::COMPRESSION_JPEG);
$small_image->setCompressionQuality(1);
But that didn't change a thing. I also tried
$img = new Imagick($small_path."/".$pic['image']);
$img->setCompression(Imagick::COMPRESSION_JPEG);
echo $img->setCompressionQuality(1); // should come out ugly
$img->writeImage();
But even that didn't change the size with quality 1. Any ideas what I'm doing wrong?