Does it work on arbitrary image sizes?

One of the nice features of the somewhat old Deoldify colorizer is support for any resolution. It actually does better than photoshops colorization: https://blog.maxg.io/colorizing-infrared-images-with-photosh...

Edit - technically, I suppose, the way Deoldify works is by rendering the color at a low resolution and then applying the filter to a higher resolution using OpenCV. I think the same sub-sampling approach could work here...