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No display device can bypass blurring caused by finite speed of the human retina because it is viewed by the human retina. The blurring we are talking about ta
by mrob 10y ago
No display device can bypass blurring caused by finite speed of the human retina because it is viewed by the human retina.
The blurring we are talking about takes place during "smooth pursuit" eye movement, where the eye tracks the moving object. During smooth pursuit a real moving object makes a static image on the retina. A strobed display makes a series of static images on the retina, and the human brain is very good at interpreting intermittent short images as motion (consider hunting a small animal through thick vegetation) so this also looks good. The sample-and-hold display presents a series of moving images on the retina when you are expecting a static image, and this is seen as blur.
CRTs are actually less sharp than real life because of non-zero phosphor decay time. A modern gaming LCD can be sharper than a CRT because LEDs can turn off faster than phosphors.
- amelius 10y agoWhat I meant is the following. Consider two frames of a video. In the first frame, a colored dot is at position (0,0). In the second frame, a colored dot (same color) is at position (10,0). The eye/brain interprets this as a dot traveling from the far left of the screen to the right by 10 pixels distance. Now, to the eye, there are 9 pixels missing between the two dots. In reality, if a dot was moving, those 9 pixels would have been briefly lit up on the retina. Hence, you need some blurring to make a sequence of frames appear to be realistic.
- mrob 10y agoAlthough higher framerate is preferable, the brain can easily interpret the motion despite the missing information. There is no blurring in reality, so adding blur only makes things worse.