![]() ![]() You can check here on the imagemagick docs. Be aware that -resize does not work correctly with -interpolate. How to resize image with imagick php Ask Question Asked 2 years, 2 months ago Modified 2 years, 2 months ago Viewed 962 times Part of PHP Collective 1 With imagick command, i want to resize image form 2Mb to 200KB, i tried: convert a.jpg -strip -define jpeg:extent200k a1.jpg And it work. It only works along -interpolative-resize. In this case: my apologies for 'preaching to the choir'. To keep the original values of the input image and avoid any blend or bluriness, you can use -interpolate nearest-neighbor or -interpolate integer. Maybe you want to revisit your -quality 90 setting in the light of this info. For photos of natural landscapes an "adaptive" filtering ( -quality 05) is generally the best.For illustrations with solid sequences of color a "none" filter ( -quality 00) is typically the most appropriate.The second digit is the PNG data encoding filter type (before it is compressed): Convert Imagemagick command to php imagick. See the documentation for more info Imagick. (However the setting of 0 has a special meaning: when you use it you'll get Huffman compression, not zlib compression level 0. readImage() reads the image which is then present in the resource - after that you can resize the resource and write it out after the work is done. The first digit (tens) is (largely) the zlib compression level, and it may go from 0 to 9. ![]() I also ran the test script on the same instance without Docker (using PHP from sudo yum -y install php70-cli php70-common php70-pecl-imagick) for PHP 7. However, for PNG output, the -quality setting is very unlike JPEG's quality setting (which simply is an integer from 0 to 100).įor PNG it is composed by two single digits: It is clear that starting from PHP 7.1, something is wrong with the performance of the Imagick::resizeImage() operation, since it’s approximately 10 times slower than in PHP 7.0. You are converting to PNG, but you are setting -quality 90 (seemingly just analogue to the JPEG quality setting). ![]()
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