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I’ll quote my other comment: > If you are looking to understand how your operating system will display images, or how your graphics drivers work, or how photos
by grandempire 1y ago
I’ll quote my other comment:
> If you are looking to understand how your operating system will display images, or how your graphics drivers work, or how photoshop will edit them, or what digital cameras aim to produce, then it’s the point sample definition.
- tobr 1y agoSometimes yes. Sometimes no! There are certainly situations where a pixel will be scaled, displayed, edited or otherwise treated as a little square.
- seba_dos1 1y agoA little rectangle even.
- grandempire 1y agoWhat is a little rectangle? Physical display pixels are separate RGB leds with a non-rectangular shape.
- Dylan16807 1y agoThey're rectangles on my monitor.
- cma 1y agoIf black and white or some other cases, but there are typically subpixels that can make things like sparse enough text stroke transitions get 3X horizontal resolution.
- Dylan16807 1y agoThe subpixels are rectangles on most screens.
- grandempire 1y agoThey tend to have rounded or cut corners and are not uniform.
- grandempire 1y agoDo the 3 separate sub pixels look like a photoshop pixel?
- Dylan16807 1y agoI'm not sure what you mean by Photoshop pixel. They also look more like a square when I back away. And the mismatch of the square model doesn't mean the point model is good.
- grandempire 1y ago> And the mismatch of the square model So your intuition for why squares makes sense is wrong, but you’re still holding on to it. > doesn't mean the point model is good. What does show it’s a good model is all the theory of image processing and the implementation of this theory in camera display systems. You’re welcome to propose an alternative theory, and if that is consistent, try to get manufacturers to adopt it.
- Dylan16807 1y ago> So your intuition for why squares makes sense is wrong, but you’re still holding on to it. I said subpixels are rectangles. Because they are. If the point model was all you need, then objects small enough to slip between points would be invisible. Which is not the case. In particular a shot of the night sky would look pure black. So if being wrong means we should abandon the model, then we can't use squares or points.
- grandempire 1y ago> I said subpixels are rectangles. Because they are https://upload.wikimedia.org/wikipedia/commons/4/4d/Pixel_geometry_01_Pengo.jpg https://upload.wikimedia.org/wikipedia/commons/4/4d/Pixel_ge... I look forward to your paper about a superior digital image representation.
- 1y ago
- afandian 1y agoBBC Micro in graphics mode 2 the pixel is a 2:1 rectangle. Other geometries for different modes. It's going back a bit, but very much living memory! https://beebwiki.mdfs.net/MODE_2 https://beebwiki.mdfs.net/MODE_2
- SimplyUnknown 1y agoIn medical imaging, data are often acquired using anisotropic resolution. So a pixel (or voxel in 3D) can be an averaged signal sample originating from 2mm of tissue in one direction and 0.9mm in another direction.
- grandempire 1y agoand it’s displayed with a completely different algorithm…
- seba_dos1 1y agoMany video formats use rectangular pixels. It's less common these days, but there were no squares on DVDs for example. Even some VGA modes have non-square pixels, and these were used by many games and... Windows 9x splash screen.