Resize and combine

[KKL]

Hi!
I'd like to convert my images to squares with the same size.
I have a white (backgroud) square on which I'd like to place the actual image. It would be great if the background rectangle could be resized to match the MAX(width or height) of the actual picture.
Meta:
resize background-pic width and height to max (width(pic1),height(pic1)
place pic1 centered on resized background-pic
output to pic1_new
Is it possible with the command line tool?
Rgds
KKL

[snibgo]

What version of IM, on what platform? I'll assume IM v7 on Windows BAT.

Code: Select all

magick ^
  in.png ^
  -set option:MYSIZE %%[fx:max(w,h)]x%%[fx:max(w,h)] ^
  -size %%[MYSIZE] xc:Blue ^
  +swap ^
  -gravity Center ^
  -compose Over -composite ^
  out.png

I've used Blue because it's easier to see than White.

[KKL]

Hi!
Thank you for your reply.
I am using Win command line (dos window)

[KKL]

WAU! It Works!!
Thak you so much!!!

[GeeMack]

resize background-pic width and height to max (width(pic1),height(pic1)
place pic1 centered on resized background-pic
output to pic1_new

Check snibgo's suggestion for a simple way to composite your input image over a square background. Here's a way to use "-extent" to expand the background to a "max(w,h)" square and produce the same result...

Code: Select all

magick input.png -gravity center -background white -extent %[fx:max(w,h)]x%[fx:max(w,h)] result.png

If you're using it in a BAT script you'll need to make those single percent signs "%" on the FX expressions into doubles "%%".