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jpeg color meter issue

Alexey Ivanov
i have a few files with white backgroung. photoshop told me the white is 255 on all channels. In C1 color readout also told the same - 255, but main window meter told me all channels have 253 or 254, how is that?
screenshot in the link:
https://drive.google.com/open?id=1kYDxwqmn1gY9qQuQbXRJSfNKLRcFfU_z
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  • Permanently deleted user
    From the user guide:

    Capture One always displays the color values of the pixels under the cursor tool in the Viewer’s tool bar, regardless of the selected cursor. The area of the cursor’s sample size remains the same between cursors and corresponds to that used by the Color Correction Picker (eyedropper) in the Color Editor tool. However, greater accuracy can be attained with the cursor readouts when the magnification of the Viewer is increased.

    In addition to the continuously updating cursor readouts, Capture One Pro can permanently display fixed sample points, or anchored readouts, at up to 20 different locations in an image. Anchored readouts are always processed at 100% magnification and are typically more accurate than the cursor readouts (even when they’re used at that zoom level).


    If you're not at 100% zoom the cursor values (those under cursor toolbar) could represent a larger area. I've seen discrepancies with the image fitting the viewer but not at 100% zoom.
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  • Alexey Ivanov
    Thank you! 100% zoom solved the problem....but how for me this is strange desicion to use color metering method based on zoom
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  • Permanently deleted user
    [quote="Payne" wrote:
    Thank you! 100% zoom solved the problem....but how for me this is strange desicion to use color metering method based on zoom


    It makes sense to me. When your image is reduced and every single pixel have to represent a larger area made of many different pixels where maybe there's some noise too and maybe they're not even an integer number, how could you expect to measure exactly a single one? And which of them? In fact when it says that anchored readouts are processed at 100% magnification, I wonder how Capture One chooses which pixel to meter on when putting a readout at a non 100% zoom. Maybe it's just the one in the center of that area? What if it's noise? I can't say. I trust that they know what they're doing and that there's a logic behind this decision and how CO tools work.
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