Use ImageMagick to place an image inside a larger canvas

Question

Getting started with ImageMagic and trying to find a way to do this... If an image is less than 50 pixels tall or 50 pixels wide, I'd like to place it (un-scaled) in the horizontal/vertical center of a new 50x50 pixel canvas on top of a white background - and save that as the new image. Anyone know if this is possible with ImageMagick? Thanks!

Answer 1

I used -extent to do this:

convert input.jpg -gravity center -background white -extent 50x50  output.jpg 

Answer 2

I wanted to do the same, except shrink the image to 70% inside. I used this:

convert input.png -resize 70%x70% -gravity center -background transparent -extent 72x72 output.png 

Not exactly what was requested but hopefully it will help someone ;).