croptool User cannont crop heavily skewed images

example : https://commons.wikimedia.org/wiki/File:Muzeum_Ziemi_Augustowskiej_July_2013_65.JPG

possible code resource: http://through-the-interface.typepad.com/through_the_interface/2013/09/selecting-an-area-of-a-perspective-image-to-de-skew-inside-autocad-using-html5-and-javascript.html

Possible solution : Provide 4 point rectangle boundary in UI for deskewing images.

Dec 22 '13 21:12 jaredzimmerman

I'm closing this as a duplicate of #17, since it seems to me that they are more or less about the same thing. I changed the title to reflect that. While the code resource is for AutoCad, I believe all kind of transforms can be carried out with css matrix transforms, but it's probably quite hard work gettint the math right unless there are libraries/code snippets around. On the server side I guess ImageMagick can do it, but it's probably not easy...

Dec 22 '13 23:12 danmichaelo

On this one I meant a perspectival skew rather than a rotation one the rotation one is probably a much easier fix, but they could be rolled up into one but but the UI might be better to have it be separate functions.

Dec 23 '13 00:12 jaredzimmerman

True, from a UI perspective they would have to be completely different, so let's keep them separate.

Dec 23 '13 10:12 danmichaelo