This is a cool party trick, but I don't see a need for this in any real applications. Black and white is its own art form, and a lot of really great black and white images would look like absolute garbage if you could convert them to color. This is because the things that make a great black and white image (dramatic contrasts, emphasis on shape/geometry, texture, etc) can lose a lot of their impact when you introduce color. Our aesthetic tolerance for contrast seems significantly reduced in color because our expectations for the image are more anchored in how things look in the real world. And colors which can be very pleasing in some images are just distracting in others.
So all this is to say.... I don't think there would be commercial demand to, say, "upgrade" classic movies with color. Those films were shot by cinematographers who were steeped in the black & white medium and made lighting and compositional choices that take greatest advantage of those creative limitations.
So all this is to say.... I don't think there would be commercial demand to, say, "upgrade" classic movies with color. Those films were shot by cinematographers who were steeped in the black & white medium and made lighting and compositional choices that take greatest advantage of those creative limitations.