Mechanical shutters for motion blur reduction & 3D [works!]
Posted: 25 Jan 2014, 05:54
I'll continue here instead of creating another thread.
I have made a low-tech shutter whith a PC case fan with the blades cut off, custom cardboard shutter, pot to control the speed, I hold it in front of my eyes. ... till my electronics arrive.
I calibrated the speed with the Test UFO site.
Works like charm but though to catch the exact frequency.
What I have noticed is that when playing a lower frame rate content (a 24fps movie) and flashing it twice (48) or three times (72) like in the cinema, I see no eye tracking blur, but image doubling or tripling (lets call it "Image Multiplication").
Then I calibrated my low-tech fan to 24 flasher per second and everything is perfect, a single sharp image.
BUT, it flickers like nobodies business... that means that Cinema with double or triple flash is also suffering from "artifacts" (image multiplication), which means that even in theaters the experience is not ideal.
After these tests I conclude that:
The only way to see ANY content without motion blur, eye-tracking blur or image multiplication, is at its native frame rate and strobed.
Even if it means 24fps @ 24Hz...Its bad believe me.
If anyone wonders, yes, a 24fps movie (blu-ray) on a 120Hz strobbing monitor, will look just like a low frequency backlight PWM artifacts or image multiplication (same thing),
aka it will not be blurred but it will look like 5 images one on top of the other with a small gap between them.
Besides, nobody actually knows/sees/cares what sample-and-hold blur looks like till they see the same content without it...
And, oh boy... I'm hooked to say the least, even if it destroys my eyes/brain at 24Hz.
In a hundred years nobody complained about the horrible 24Hz-single-flashing-shutter at the cinema, there for I will also not.
The movies are "Flickers" for a reason you know...
Here are Film Projector Shutters for example (Single, Double & Triple flash):
What do you think, will we ever see a low frame rate content without eye tracking blur AND without visible flickering?
I personally don't think so (its physically/humanly impossible), Its 24fps at 24Hz strobed, or BLUR.
BUT, there is a positive side to this.
A 24fps @ 24Hz Strobed (or BFI) looks like its high frame rate because of the Eye/Brain Tracking effect.
I think the brain somehow completes the missing information and makes the image looks A LOT smoother.
Once I actually got used to the horrible 24Hz flicker (takes about 10 minutes, yes, your brain gets used to this), I got the most smooth cinema experience I have ever watched.
A picture to demonstrate:
P.S
Mark, Can you please add an option in testufo.com to select a Custom UFO framerate in the "Framerate" tests.
For example: I want to see how 24, 30 looks on a my 72Hz screen, but I only see 72, 36, 18 ,9 etc (divisions of 2)...
I have made a low-tech shutter whith a PC case fan with the blades cut off, custom cardboard shutter, pot to control the speed, I hold it in front of my eyes. ... till my electronics arrive.
I calibrated the speed with the Test UFO site.
Works like charm but though to catch the exact frequency.
What I have noticed is that when playing a lower frame rate content (a 24fps movie) and flashing it twice (48) or three times (72) like in the cinema, I see no eye tracking blur, but image doubling or tripling (lets call it "Image Multiplication").
Then I calibrated my low-tech fan to 24 flasher per second and everything is perfect, a single sharp image.
BUT, it flickers like nobodies business... that means that Cinema with double or triple flash is also suffering from "artifacts" (image multiplication), which means that even in theaters the experience is not ideal.
After these tests I conclude that:
The only way to see ANY content without motion blur, eye-tracking blur or image multiplication, is at its native frame rate and strobed.
Even if it means 24fps @ 24Hz...Its bad believe me.
If anyone wonders, yes, a 24fps movie (blu-ray) on a 120Hz strobbing monitor, will look just like a low frequency backlight PWM artifacts or image multiplication (same thing),
aka it will not be blurred but it will look like 5 images one on top of the other with a small gap between them.
Besides, nobody actually knows/sees/cares what sample-and-hold blur looks like till they see the same content without it...
And, oh boy... I'm hooked to say the least, even if it destroys my eyes/brain at 24Hz.
In a hundred years nobody complained about the horrible 24Hz-single-flashing-shutter at the cinema, there for I will also not.
The movies are "Flickers" for a reason you know...
Here are Film Projector Shutters for example (Single, Double & Triple flash):
What do you think, will we ever see a low frame rate content without eye tracking blur AND without visible flickering?
I personally don't think so (its physically/humanly impossible), Its 24fps at 24Hz strobed, or BLUR.
BUT, there is a positive side to this.
A 24fps @ 24Hz Strobed (or BFI) looks like its high frame rate because of the Eye/Brain Tracking effect.
I think the brain somehow completes the missing information and makes the image looks A LOT smoother.
Once I actually got used to the horrible 24Hz flicker (takes about 10 minutes, yes, your brain gets used to this), I got the most smooth cinema experience I have ever watched.
A picture to demonstrate:
P.S
Mark, Can you please add an option in testufo.com to select a Custom UFO framerate in the "Framerate" tests.
For example: I want to see how 24, 30 looks on a my 72Hz screen, but I only see 72, 36, 18 ,9 etc (divisions of 2)...