Hello, I'm new here so if there is any formatting error, sorry!
I'm developing a WEB solution and I need to load an image in the browser and select 4 points within that image and get their values of the pixels that were selected in those 4 points. My question is how to make such selections and capture their values in pixel? Is it possible to do this with some WEB language (PHP, JavaScript, CSS, etc.)?
I've done several searches on Google and the closest I found was the use of the PHP GD library, but that also did not fit what I need.
I await your response and thank you for the collaboration!