Sorry, I don't understand. What sort of features are you thinking about? And why only 16 possibilities? There's a nearly infinite number of ways in which the average of 4x4 pixels can be a particular value.
I have not done that yet, but that was basically my original motivation. The main difficulty would be obtaining a good dataset for training, specifically a dataset where most of the faces are not looking straight ahead at the camera, and where the camera is located above eye level as would be the case in a typical security camera.
It would be valuable to see statistics about how well this algorithm does against the face database itself. De-rez a sample of images from the database, up-rez them and then find them in the database using face recognition. How often is the original image identified from the up-rezzed version?
It would also be interesting to see how different the up-rez results are if the original is cropped differently, shifted, slightly rotated, darkened or lightened.
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[ 2.0 ms ] story [ 39.2 ms ] threadIt would be valuable to see statistics about how well this algorithm does against the face database itself. De-rez a sample of images from the database, up-rez them and then find them in the database using face recognition. How often is the original image identified from the up-rezzed version?
It would also be interesting to see how different the up-rez results are if the original is cropped differently, shifted, slightly rotated, darkened or lightened.
https://github.com/nagadomi/waifu2x