convert input.gif -coalesce -repage 0x0 -crop WxH+X+Y +repage output.gif Animated gifs are often optimised to save space, but imagemagick doesn’t seem to consider this when applying the crop command and treats each frame individually. -coalesce rebuilds the full frames. Other commands will take into consideration the offset information supplied in the original gif, so you … Read more
I gather you’re looking for an usable aspect ratio integer:integer solution like 16:9 rather than a float:1 solution like 1.77778:1. If so, what you need to do is find the greatest common divisor (GCD) and divide both values by that. The GCD is the highest number that evenly divides both numbers. So the GCD for … Read more
This can be achieved with: Bitmap.createBitmap(source, x, y, width, height) if (srcBmp.getWidth() >= srcBmp.getHeight()){ dstBmp = Bitmap.createBitmap( srcBmp, srcBmp.getWidth()/2 – srcBmp.getHeight()/2, 0, srcBmp.getHeight(), srcBmp.getHeight() ); }else{ dstBmp = Bitmap.createBitmap( srcBmp, 0, srcBmp.getHeight()/2 – srcBmp.getWidth()/2, srcBmp.getWidth(), srcBmp.getWidth() ); }
There is a crop() method: w, h = yourImage.size yourImage.crop((0, 30, w, h-30)).save(…)
A pure CSS solution with no wrapper div or other useless code: img { object-fit: cover; width: 230px; height: 230px; }