Background color selection in warp_perspective() function

🚀 Feature

Possibility to select the color (RGB) for the background pixels in the warp_perspective() function (pixels whose color des not come from the original warped image).

Motivation

OpenCV’s warpPerspective() function has a borderValue parameter allowing to select the color of the background pixels when the borderMode is set to BORDER_CONSTANT. This is very useful when the desired background color is not black (default). Currently Kornia’s warp_perspective() only supports black (zeros option for border_mode).

Pitch

I’d like to have a parameter similar to OpenCV’s borderValue to select the color of the background when the border_mode of the warp_perspective function in Kornia is set to zeros (and in that case, probably this name should change from zeros to something like constant, being black the default color).

[dribnet]

Hi @ducha-aiki - and sorry - I was just being cheeky and letting you know I still had my eye on this one! I think kornia is amazing thanks to the active dev team behind it and I will try to get you a PR and with any luck we’ll see this in the next release instead.

[edgarriba]

It’s not a priority right now - but I’ll mark it as future future.