Sharpened noise/filmgrain doesn't look good.ĬAS's more complex sharpening curve (the contrast adaptive part) also makes it easier to push a strong sharpening without getting as many artifacts, where LumaSharpen relies more on not going overboard with the sharpening in the first place. But noise is not an issue all games have - it's typically only those with a very heavy filmgrain where it because a problem. When LumaSharpen is set to the wide pattern it because less sensitive to noise compared to the normal pattern but I think CAS still has a slight advantage there. I just use a very strict cap on the max sharpen but I might try this as an option for LumaSharpen even though it will hurt performance.ĬAS's advantages are that it's easier to tweak to get a good result, and that it is less sensitive to noise than LumaSharpen is - at least when LumaSharpen uses it's normal pattern. It also uses a min/max limit where the sharpened pixel cannot go beyond the minimum or maximum brightness of the surrounding pixels. People are told it's the best so they don't bother trying the other ones.ĬAS limits the sharpening with a curve formula where the lowest contrast areas do not get a lot of sharpening but the middle contrast do and the highest contrast gets little again - At least that is how I remember it. I sometimes wonder if it's because the default settings are very subtle and the popular opinion seems to be a preference for the garishly sharp that people now seem to prefer CAS but I mostly think it's the AMD marketing. I cap the max amount of sharpening a pixel can get and then I use quite subtle default settings. Making it look sharp is easy, making it look sharp and natural is hard. It's the last criteria that is the hardest to get just right for a sharpen filter. Quality for me is looking sharp and detailed, without looking unnatural, harsh or with visible artifacts. The quality of the sharpening and the speed.
0 Comments
Leave a Reply. |