I think we've gotten kind of stuck here, with so many examples and long videos showing many different forms that the artifacts can show up, alongside more videos and other images that don't seem to show any problems.
Also, I was mistaken in thinking that my 7 stripe images was going to show the same problems on all other machines. I still want to try and find a single, clear, reproducable way of showing the issue, but it's challenging to find a way to present it so that the effect is obvious.
The best examples so far usually need to have exposure settings tweaked or posterization applied, but I want to avoid adjustments like those because they visually alter the rest of the image and can make it seem like "normal" images aren't really affected.
One test that's repeatable on 2 PCs here (my desktop and a Surface Pro 3) is to use a grayscale gradient, this one with more shades than my original 7-stripe version.
Open the attached "Grayscale test gradient image" in
any photo editor (I've used IrfanView, MS Photos, MS Paint, Paint.net, Paint 3D, Snip & Sketch, PhD7) and you should see a gradient with evenly spaced vertical lines. In PHD 10's Library, Adjustment and Edit screens, the image looks
exactly the same as in the other apps.
However, when viewed in the Layers window and without making any adjustments, the spacing between vertical lines is not linear. The lines are far apart at the dark edges but they become bunched up closely together about 1/3 of the way from the edge toward the center. Here's a close up of the left edge in each view:
What this shows is that for some reason - at least on my 2 systems- the luminance scale in the Layers module is
not the same as in the other PhD 10 modules (or that other apps use). This is
very much like the Full/Limited luminance issue in video that I linked to in my first reply, and this is where CL's engineers should focus their attention.
Can someone else confirm that the vertical line spacing changes when switching between Lib/Adj/Edit and Layers in PhD 10? Also please confirm that the spacing looks equal in any other photo app, and it's only different in PhD 10 Layers.
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section-a-mp4-media-player-classic-home-cinema-v1-4-2668.png |
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Grayscale test gradient image |
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2061 Kbytes
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Gradient view.png |
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Full size screen shot comparison |
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563 Kbytes
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YouTube/optodata
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