Should preview and histogram clipping indicators agree?

Software ART
1

Mostly a curiosity, but I’m curious. :upside_down_face:

OK, I have the highlight clipping indicator enabled:

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And I have some specular highlights (wet turtle shell), which trigger the indicator both on the preview…

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…and on the histogram’s upper right corner:

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(Yeah, I know I have shadow clipping, too, but that’s beside the point.)

So I increase Highlight Precompression in Log Tone Mapping and the histogram HL clip indicator goes away:

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But it still shows on the preview:

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Shouldn’t they be in sync with each other, basically? Either it’s clipping or it not, right?

Thanks.

2

Hello, hard to reproduce this, but in some cases, yes, the histogram doesn’t show the colored blocks on the upper right and yes, the highlight indicator shows some overexposed areas. I guess this is a rounding error or something.

3

It also depends on “Clipping indication” in preferences, I think…

4

Yes, but (without reading the code, wherever it occurs) I would expect both the clipping indicators and the histogram flags make their “show / no-show” decisions based on the same value(s). Apparently not.

At any rate, no biggie. Just a curiosity.

5

I don’t remember how the histogram code works right now, but most likely @alvamatik’s explanation is the right one

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