winfried_z Posted January 28, 2023 Posted January 28, 2023 If a live clarity filter is applied to a whole image (or a part of an image including borders), it happens that a small region close to the border becomes too bright. This is the case for Affinity Photo 2.0.4 and all earlier versions, including V1. With an ordinary (destructive) clarity filter, I have never observed this behaviour. The effect is usually not strong, but can be disturbing depending on the content of the image. For demonstration purposes, I applied a live clarity filter with a strength of 100% twice to an image which is overall grey (50%). This is the result after applying the double live clarity filter: I also provide the histograms before (left) and after (right): I admit that this example is highly overdone, but as mentioned, also in realistic situations the effect can be unacceptably visible, such that the only workaround I can see is using the destructive filter version. Win11 pro, 22H2 AMD Ryzen 7 5800X 8-Core, 3.80 GHz 32GB RAM NVIDIA GeForce RTX 3060Ti, studio driver 528.24 Display 3840 x 2160, 150% Quote
NotMyFault Posted January 28, 2023 Posted January 28, 2023 Did you activate „protect alpha“? Quote Mac mini M1 A2348 | MBP M3 Windows 11 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 | Dell 27“ 4K iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. I use iPad screenshots and videos even in the Desktop section of the forum when I expect no relevant difference.
NotMyFault Posted January 28, 2023 Posted January 28, 2023 26 minutes ago, N.P.M. said: Clarity doesn't have a protect alpha option Neither the live filter version. One could use a rectangle as mask larger than the image. That is very strange - Yesterday I used protect alpha on iPad with live clarity filter. Is it missing on Windows? —————————————————————🔽 Quote Mac mini M1 A2348 | MBP M3 Windows 11 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 | Dell 27“ 4K iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. I use iPad screenshots and videos even in the Desktop section of the forum when I expect no relevant difference.
NotMyFault Posted January 28, 2023 Posted January 28, 2023 9 minutes ago, NotMyFault said: That is very strange - Yesterday I used protect alpha on iPad with live clarity filter. Is it missing on Windows? —————————————————————🔽 Even if it is shown in UI, it seems to be non-working (making no difference) Quote Mac mini M1 A2348 | MBP M3 Windows 11 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080 LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 | Dell 27“ 4K iPad Air Gen 5 (2022) A2589 Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps. I use iPad screenshots and videos even in the Desktop section of the forum when I expect no relevant difference.
winfried_z Posted January 28, 2023 Author Posted January 28, 2023 Thanks for the answers. NotMyFault: Strange enough, there is no "protect alpha" option for the destructive clarity filter, too; nevertheless, this one works as expected. N.P.M.: Also when using a mask larger than the image, I was not able to get rid of the bright border. Quote
winfried_z Posted January 28, 2023 Author Posted January 28, 2023 52 minutes ago, N.P.M. said: Did you use the rectangle as a mask for just the live clarity filter (perhaps) above the image/pixellayer? RectAsMask.afphoto 26.95 MB · 1 download Thanks N.P.M., I will try this with one of my images. Quote
winfried_z Posted January 29, 2023 Author Posted January 29, 2023 18 hours ago, N.P.M. said: Did you use the rectangle as a mask for just the live clarity filter (perhaps) above the image/pixellayer? RectAsMask.afphoto 26.95 MB · 1 download N.P.M.: Thanks again, but I'm afraid this did not appear to remedy the problem. I constructed a mockup of your .afphoto file, with the image completely replaced by a grey image exactly filling the canvas, see the uploaded file. When looking at the histogram, one recognizes that the image with the live clarity filter applied is not completely homogeneous; there is a brighter border in the left part. This can be seen even more clearly by looking at a small marquee, e.g., at the upper left corner. Anyway, I believe the problem could by easily fixed by Serif, because it does not show up with the destructive clarity filter. grey2.afphoto Quote
winfried_z Posted February 3, 2023 Author Posted February 3, 2023 I just realized that the said effect can even be seen (if one has a very close look) in the Affinity tutorial video on applying the clarity filter. Two snapshots, without (top) and with (bottom) live clarity filter: Quote
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