Top resolution for non-native displays at 1440p
Top resolution for non-native displays at 1440p
I'm unsure if such test images effectively demonstrate perfect scaling. The alignment might depend on transition frequency, potentially matching the scaling method to yield ideal outcomes. It requires a more advanced approach—similar to the test pattern available at https://www.eizo.be/monitor-test/. If the monitor maintains a resolution factor relative to the native image, the displayed result should reflect the scaled version using nearest-neighbor interpolation at the original size. (Currently I can't access the imgur link.)
I see it as two elements: the scaling method and the image type. If you're sending a uniform frequency picture to the monitor's adjuster and it matches well with that method, you'll achieve an ideal outcome. I'm thinking a perfect match comes from nearest neighbor using an integer factor since no smoothing is applied. Essentially, you should test with different images to evaluate the scaler's performance for whole-number scaling.
The grey/green/purple test picture isn't consistent, and it shows what a poor scaler appears like in the first case.
The Glenwing post shows a test pattern with consistent frequency in all directions and a change rate suitable for computer analysis. When the scaler performs ideal scaling at a resolution matching the native one, verification can be achieved using any image with enough contrast. I’m clarifying that perfect scaling here refers to behavior similar to nearest neighbor interpolation from lower to higher resolution. For instance, upscaling 1280x720 to 2560x1440 would result in double pixel values in both dimensions.