software by Stafford Williamsstafford williams

imagemagick

trim transparency#


        
bash

        

            
        

     
# ensure all borders are transparnet
convert "myImage.png" -bordercolor none -border 5 "myImage.png" 
# trim transparency
convert "myImage.png" -trim +repage "myImage.png"

resize all#


        
bash

        

            
        

     
mkdir resized
for file in *.jpg; do
    convert "$file" -auto-orient -resize 512x768^ -gravity center -extent 512x768 +repage "resized/${file%.jpg}.png"
done

posts#