On Ubuntu 18.04, these are the default compression methods used for the following common image formats:
PNG: Imagick::COMPRESSION_ZIP
JPEG: Imagick::COMPRESSION_JPEG
GIF: Imagick::COMPRESSION_LZW
On Ubuntu 18.04, these are the default compression methods used for the following common image formats:
PNG: Imagick::COMPRESSION_ZIP
JPEG: Imagick::COMPRESSION_JPEG
GIF: Imagick::COMPRESSION_LZW