• magick convert -monitor -density 150 $inputFile -auto-level -gamma .4 -compress JPEG -quality 80 -adaptive-sharpen 2 -antialias -compress JPEG $outputFile

https://imagemagick.org/

pdf xpdf jpg xjpg jpeg xjpeg autolevel level xautolevel xlevel contrast xcontrast cli imagemagick ximagemagick primjer xprimjer xexample example