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| Just because technology can do something, doent meant its always right |
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| Simon:
--- Quote from: bd139 on June 20, 2022, 09:13:50 pm --- --- Quote from: 2N3055 on June 20, 2022, 09:11:09 pm --- --- Quote from: Simon on June 20, 2022, 09:05:48 pm ---Don't know what you mean by focal plane, yes we see with the centre of our eyes the most, I think from memory it is something like a 1.5 degree angle that has most of the ability with the rest being peripheral vision or pieced together and yes all of the screen needs to be of a resolution that the centre of the eye cannot see the pixels but what is that resolution? (angular resolution will do as it will be agnostic to the screen size/distance) --- End quote --- https://www.eevblog.com/forum/chat/just-because-technology-can-do-something-doent-meant-its-always-right/msg4249858/#msg4249858 That is actually measured by scientists... --- End quote --- No they're wrong. Because at greater than 1m I can clearly tell the difference between the 4k and a 5k 27" screen at 157dpi and 218dpi which I sit in front of every day. If I open the full London connections tube map to 1/4 of each screen in a PDF, I can read the station names on the 5k but not on the 4k. The information isn't even there on the 4k. On a 1440p screen I'd probably have to have it full screen. Also there's no citation or conditions for your information. Perhaps that's an AVERAGE across the entire eye. Within the focal centre there might be 50x the resolution of 0.3mm and that's what is important. Edit: here's a 14.2" 3024x1964 screenshot with the tube map at 254ppi which is 60-70cm away from me. I can read the station names fine! (I have above average eyesight for ref) --- End quote --- Just look up the definition of good vision, I think it is something like you should be able to tell apart two dots that are 1mm apart from a viewing distance of 1m, I assume this is referred to the centre of the eye. So taking that down to say 333mm away which is as close most of us get to a monitor that is 0.33mm apart or 3 pixels per mm, about 75 ppi. This is what most FHD monitors end up being and you can see the pixels, so at 4k that is 6 pixels per mm, you will now struggle to tell the pixels apart although I'm sure there will be variations in constructions of different monitors at different resolutions that will be better than another close to it. Point is 8k would be totally pointless and I sit 0.5m from my monitors at least so 4k on my 600mm wide screen is just fine at 6.4 pixels per mm. at 1m away I will definitely not be able to tell dots 0.15mm apart and at 0.5m still not. |
| bd139:
The whole point is there being pixels so small you can’t see the discrete steps in curves of text etc. that’s a different problem to not being able to see discrete pixels. |
| Simon:
Yes and as I have just calculated for you at 6 pixels per mm we have pretty much achieved that with 4k, OK you can argue the toss that you see 5k better, it may just be a better quality panel, some of the FHD ones I have had at work had such thick lines between them that I could not help but see the pixels, but 8k, you want 13 pixels per mm on a 27" monitor? I'll never be closer than 0.5m, and if at 0.5m I can tell two dots apart that are 0.5mm apart having pixels 0.15mm apart seems to do it don't you think? Fact is I am in front of a 4k monitor that is 27" and about 0.5m away and for all I care that could be magazine print, curves are curves as far as my eye is concerned but on a crap FHD monitor my head would be hurting. I usually use a font that is deliberately full of curves and non parallel lines, looks awful on FHD, on these 4k monitors this font that is totally not designed for screens looks just fine. |
| bd139:
4k vs 5k is more display scaling than anything. 4k is 1.5:1 ratio where 5k is 2:1 which allows for integer scaling. Less blurry. |
| Simon:
scaling of what? how is something 25% bigger a ratio that is 33% bigger? Yes integer scaling will be less blurry, but we are still taking about over 3 times what our eyes can pick out anyway so results will vary with the image. |
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