tupp Posted April 22, 2021 Share Posted April 22, 2021 11 hours ago, tupp said: Well, I posted an image above of a compositor with an image displayed within it's viewer which was set at 100%. Unlike Yedlin, I think that I was able to achieve a 1-to-1 pixel match, but, by all means, please scrutinize it. 10 hours ago, kye said: The whole point of the test was to compare the perceptibility of 2K vs higher resolutions. Setting aside the fact that this is the first time that you have made that particular claim regarding "the whole point of the test," a 1-to-1 pixel match is crucial for proper perceptibility in a resolution comparison. Yedlin spent over four minutes in the beginning of his video explaining that fact, and you additionally explained and defended the 1-to-1 pixel match. I and @slonick81 were able to achieve a 1-to-1 pixel match within a compositor viewer, but Yedlin did not do so. So, Yedlin failed to provide the crucial 1-to-1 pixel match required for proper perceptibility of 2K and higher resolutions. 11 hours ago, kye said: This is the point you keep missing. Right. I keep missing the point that the comparison is between 2K and higher resolutions: 17 hours ago, tupp said: On the other hand, if CFA interpolation impacts resolution (as you claim), then shooting at 6K and then downsampling to 2K will likely give different results than shooting at 6K and separately shooting the 2K image with a 2K camera. This is because the interpolation cell area of the 2K sensor is relatively coarser/larger within the frame than that of the 6K interpolation cell area. So, unfortunately, Yedlin's comparison doesn't apply to actually shooting the 2K image with a 2K camera. 10 hours ago, kye said: Determining if there is a difference between 2K and some other resolution on a camera that no-one ever uses is a useless test. Once again, missing the point. You have fascinating and imaginative interpretation skills. What gave you the notion that anyone referred to, "a camera that no-one ever uses?" Again, it is irrelevant whether the starting images were captured with an common or uncommon camera, as long as those images are sharp enough and of a high enough resolution, which I previously indicated here: 17 hours ago, tupp said: The starting images for the comparison are simply the starting images for the comparison. There are many variables that might affect the sharpness of those starting images, such as, they may have been shot with softer vintage lenses, or shot with a diffusion filter or, if they were taken with a sensor that was demosaiced, they might have used a coarse or fine algorithm. None of those variables matter to our subsequent comparison, as long as the starting images are sharp enough to demonstrate the potential discernability between the different resolutions being tested. So, as long as there is enough sharpness and resolution in the starting images, the resolution test is "camera agnostic" -- as it should be. In addition, the tests should be "post image processing" agnostic, with no peculiar nor unintended/uncontrolled side-effects. Unfortunately, the side-effect of pixel blending and post interpolation are big problems with Yedlin's test, so the results of his comparison are not "post image processing" agnostic and only apply to his peculiar post set-up and rendering settings, whatever they may be. Now, what was that you said about my "missing the point" on "determining if there is a difference between 2K and some other resolution?" Quote Link to comment Share on other sites More sharing options...
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