software question

There are many ways to distort an image into a a different Aspect ratio and you can do it without distortion using cropping.   You change an image Aspect Ratio  without distortion by cropping and scaling the crop or you can do it with distortion using a feature like content aware scale, where  know  object will be scale with a constrains scaling so these objects will not distort  and be blend into the  distorted  images resize where the  known object were removed.  Basically the image background is distorted into the changed  aspect ratio image  and the known objects are re composed into the distorted background.