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luminosity range mask curve limit effect, plus periphery effect on blur


dmstraker

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Can't remember if I submitted these (also not found on search here, and beta database unavailable):

As in attached and starting with gradient layer, black to white along x-axis. Add Luminosity Range Mask and adjust nodes as shown.

When curve hits top or bottom edge of adjustment square, the effect is sudden, unexpected and presumably incorrect. 

Also when blur is increase, an edge effect around the periphery of the image is seen, much as would be found using a Gaussian Blur. It looks like a 'Preserve Alpha' checkbox is needed.

gradient bug 2.jpg

Dave Straker

Cameras: Sony A7R2, RX100V

Computers: Win10: Chillblast i9 Custom + Philips 40in 4K & Benq 23in; Surface Pro 4 i5; iPad Pro 11"

Favourite word: Aha. For me and for others.

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Can't reproduce on Mac

Can yo share your document?

 

PS tested again in RGB/16, same result.

Screenshot 2022-12-16 at 23.47.09.png

Luminosity mask OK.afphoto

Mac mini M1 A2348 | Windows 10 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080

LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5

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.

 

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Looks like it's Windows-specific. Attached is what I saw after loading the Luminosity mask OK.afphoto file to 2.0.3.

Thanks for checking on Mac.

luminosity mask ok - screen capture after load on windows.jpg

Dave Straker

Cameras: Sony A7R2, RX100V

Computers: Win10: Chillblast i9 Custom + Philips 40in 4K & Benq 23in; Surface Pro 4 i5; iPad Pro 11"

Favourite word: Aha. For me and for others.

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  • 2 weeks later...

I have the same issue. See three examples with luminosity range mask in preview mode.

Mask in the first picture is ok, but as soon as the curve touches the uppest x-axis (second picture) pure white becomes suddenly black .

I'm able to partialy workaround it moving the most right node to the left. The curve in the third picture is very close to the second one, but pure white remains as is.

image.thumb.jpeg.5eec07b58520637701bea8855653a302.jpeg

image.thumb.jpeg.743babb075f53850eb4e15bffcc549ee.jpeg

image.thumb.jpeg.37d2697ec9be2c8abb3e6807340ca021.jpeg

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  • 2 weeks later...
  • 1 month later...
  • Staff

The issue "Luminosity Mask gives incorrect results due to clipping range" (REF: AFP-5840) has now been fixed by the developers.
This fix is included in build 2.1.0.1709 (or later) which is already available as a customer beta and will be included in the next release.
Customer beta builds are announced here and you can participate by following these instructions.

If you still experience this problem once you are using that build version (or later) please make a new thread referencing this one.

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