Is there a way to detect or measure temporal dithering beyond using your eyeballs, e.g., how it's possible to detect PWM flickering using camera shutter speed?

I think my laptop running Linux might be using dithering, but I'm not sure. I don't have a screen which I know for sure doesn't dither to compare my laptop to.
I don't really want to switch or even try Windows without knowing for sure that my laptop's screen is even dithering under Linux in the first place.

A capture card that the device's output passes through, hopefully unnoticed by both OS and display. As such cards are expensive, we haven't had many people try this thoroughly yet. It requires untouched recording.

I think the best choice would be an external capture card that is independent of the device whose output is going to be captured.

If we could find the cheapest external card that does what we need (plus we'd need to write some software to analyze the captured frames, but that part should be easy), we'd have a tool that people could actually afford and use to reveal temporal dithering.

    Or a high speed camera with a macro lens, but that's also SF expensive

    KM by machine's output to be measured you mean it's HDMI? But dithering can occur on the external monitor itself, or the laptop's screen can be a total different route or even graphics card

      I bet if we could catch the eyes/ears of Linus Tech Tips, they could shed some light on this. Wishful thinking. Depending on cost though, if there is a verified way to determine temporal dithering, I wouldn't mind ponying up.

      KM Hey temporal dithering is not the only issue, here spatial and different types of dithering also the cause of our problem.

        KM

        Nothing seems more important to me at this time. I wish I could pin your comment.

        We need this to move forward.

        We’re going over the same old ground, and this is the solution.

          Since capture cards may or may not be a true representation of what the gpu or display is doing, would an extremely high speed camera be able to detect dithering?

          • JTL replied to this.

            Clokwork I think you'd also need a microscope and proper attachment mechanism for that, making this an expensive project...

              I would highly consider buying. I could partially pay myself back on the YouTube channel testing panels (with the right test methods).

              More importantly, it would be nice to know what’s really going on with these panels.

              dev