It's a neat analysis from a mathematical perspective, but (especially for a rotating component like this) wouldn't the lighting be all wrong for the remapped pixels? The slow-speed scanning examples use a fixed image (note the highlight doesn't change) so it's likely not usable for real-world digital photography without updates to account for lighting.
Why would it be wrong? The pixels have the correct lighting (assuming the overall ambient light didn't change during the rotation), just the wrong position.
They have the correct lighting at their current position (the propeller was actually at that point in the image when the photo was taken). Which means when you transform them you'll get wrong lighting in the severely bent parts because they rotated elsewhere when the picture was taken. Light shines on it from another side and you cannot fix that just by changing the image transformation. It's not the ambient light, but the directional part.
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It's a neat analysis from a mathematical perspective, but (especially for a rotating component like this) wouldn't the lighting be all wrong for the remapped pixels? The slow-speed scanning examples use a fixed image (note the highlight doesn't change) so it's likely not usable for real-world digital photography without updates to account for lighting.
Not only lighting would be wrong, but there would be holes in places where blades were before remapping.
Why would it be wrong? The pixels have the correct lighting (assuming the overall ambient light didn't change during the rotation), just the wrong position.
They have the correct lighting at their current position (the propeller was actually at that point in the image when the photo was taken). Which means when you transform them you'll get wrong lighting in the severely bent parts because they rotated elsewhere when the picture was taken. Light shines on it from another side and you cannot fix that just by changing the image transformation. It's not the ambient light, but the directional part.
A yes, the directional light (highlights, specs etc) would change...