This is a long shot, but I’ve really no idea where to begin, but it seems do-able?
I am looking for an equation that makes equirectangular images look like a panorama.
A friend showed me a Photoshop plug in that could transform an equirectangular image to Mercator projection. And if I trim the top and bottom off it’s a great way to create panoramas of people.
I’ve added some examples below. First I double the image height, then apply some form of equation, that stretches more as it goes out from the center.
Its not a simple doubling of size, it needs to have a slow growth from the middle put to look “normal” again.
Sorry to just ask out of the blue, but I’ve had a look at equation examples on these forums, and then googled maths equations and can’t even figure out where to start!