Legacy ImageMagick Discussions Archive

Thanks to all guys, all your commands works! Because some of my pngs are not square, so I modify snibgo's command a little.
magick lBW9I.png ( +clone -trim -set option:NTRIM %[fx:min(min(page.x,page.width-w-page.x),min(page.y,page.height-h-page.y)*page.width/page.height)]x%[fx:min(min(page.y,page ...

My IM version in window7 is V7.0.7-31, in ubuntu is V6.7.7-10, so, both version I have. But I prefer with linux shell script than dos, if V7 is good at do this staff, maybe I should update the ubuntu IM Version.

Thank you for your attention.

The original file has a black dot in center, and some transparency at top, right, bottom, and left. I want to trim transparency as much as I can, while keep the original ratio aspect, and part's distance to center, after trim, the black dot should still in the center. But with command I post, after ...

I have a png with some transparency at board, and I want to trim the transparency, and keep every thing with same distance to the original center.
The original
https://i.stack.imgur.com/In3um.png
The result I want.
https://i.stack.imgur.com/NwlfX.png
The result with command convert original.png ...