Do our eyes see in frames (like a camera) or is our sight continuous?
We don't literally have a shutter that gives us a frame rate but we do have a virtual one.Movies fool us because when you go upwards of 24fps, the slideshow effect turns into a smooth video due to the processing speed of the brain.When shown an image, it takes a certain amount of milliseconds not only to send it to be processed but also to process.It so happens that 24fps is the least amount of frame rate required to overwhelm the processing speed thus turning film playback into a magical illusion.This is also why we miss out on many details in a movie because it's quicker than our ability to fully analyze the scene. Giving rise to Pixar easter eggs and several youtube videos pointing out cosmetic errors.In regards to real life, the speed of your perception of any event is determined by the brain's innate ability to process information from the optic nerve.But brains aren't that easy to figure out, as they are biological in design instead of mathematically symmetrical.During a car crash, a survivor can report seeing the glass shatter in slow motion because such an event asks for the brain to allocate unreal amounts of power to vision processing in hopes to save oneself.So to answer your question, the virtual frame rate of vision is not as consistent as one would imagine.Neuroscientists have yet to understand what causes our perception of time to be at the rate we experience it to be.
For how much would a camera with the quality of our eyes be sold?
I am going to assume that by “camera with quality of our eye" mean camera with image capturing quality of our eyeball but have the focus that normal camera have and work fine as a camera.The image capturing quality of average human's eye:576 megapixelSpeed in image capturing: around 45–255 fps.The best digital stay still camera our technology have available: Hasselblad H5D-200c Multi-Shot Medium Format DSLR CameraPrice: $44,995.00 USDThe image capturing quality:around 200 megapixelSpeed in image capturing:multi-shot mode that have image quality of 200 megapixel required 20 sec. of perfectly still camera holding.Conclusion:the price can't be guaranteed because we don't have any information about the cost take in development of technology and the difficulty of production of the said camera also,the price and quality relativity of camera does not add up exponentially*Note1:by add up exponentially I mean it will not add up like this:100 megapixel camera=100usd200 megapixel camera=200usdCreating higher quality camera is not like gluing multiple low quality camera together**Note2:but the relativity of quality and price will always goes up like this:Higher quality=higher price. *so it's nearly impossible to determine the price of the said camera but I think the price of the said camera will be always be more than $44,995.00 USD because, like I said. The relativity of price and quality will always be like this:Higher quality=higher price.So the price of your camera, at least. Is $44,995.00 USDReference:Hasselblad H5D-200c Multi-Shot Medium Format DSLR H-3013708 B&HHow many frames per second can the human eye see?
What's the difference between 4K at 30 fps and 4K at 60 fps?
First let’s see what those numbers and letters mean.I think you know that video is just multiple pictures shown at high enough rate, so that our brains process them as continuous movement.“4K” is the amount of pixels of each picture (= resolution). More pixels means more detail can fit in the picture. amount of vertical pixels in each frameThe apple above has the resolution of 1280x720, the apple below is only 10 pixels high.4K resolution means that the picture has 4000 horizontal pixels, (usually 3840x2160 resolution is referred as 4K resolution).“30 fps” and “60 fps” tell us the amount of frames per second, the more frames per second, the smoother the video looks. you can try the difference here: Multiple Framerates.The “4K 30 fps” means a new image with resolution of 3840x2160 is displayed 30 times per second. “4K 60 fps” displays twice as many images in the same amount of time, thus requiring more powerful hardware to do it.If you are talking about gaming at 4K, that requires a moderately beefy hardware, especially at 60fps. I personally enjoy 1080p 120 fps more than I do 4K 30 fps. (I currently have a 2160p 144Hz monitor, which for me is the sweet spot)For video/film production they usually go with either 4K at lower frame rate (24 or 30 fps), or lower resolution (1920x1080 or 1280x720) at a higher frame rate (60fps)TL;DR: Higher fps means smoother motion in video. Higher resolution means more detail in each frame.
"Human eyes cannot see things beyond 60Hz." Then why are the 120Hz/144Hz monitor better?
There are several reasons, but I warn you not to over-generalize.The idea frame rate depends also on technology. A CRT screen has few pixels very luminous and then luminescence diminishes quickly, so very flicker. A large increase of frame rate (also if repeated) helps to remove such flicker.Flat screens usually have not such flicker: the light is constant, the pixels changes when it is needed (during the screen refresh, but without fade out and fade in).Human eyes have vision limit around 50 Hz, under some well defined conditions.With a computer monitor, we move the head and the eyes very quickly (compared to television), and such movement could make our eyes notice the frames, so a much higher frame rate is desired.Additionally, the screen (but very new video cards, and special program who take advantage from it) is refreshed regularly, so if there is a change (cursor move) just after a refresh, you need to wait next refresh (and usually image is prepared just before the refresh, so adding lag). So a “quicker” monitor will make images smooth and more immediate.Excursus about 24 fps in movies:On movies, the image is “only 24 fps”, but usually the light come for most of time (and always same intensity). Some movies are filmed at higher speed, but some of them then seems more like “youtube” then movie, so directors are playing with different fps and different “angles” (how much time the frame is illuminated, before next frame). But this is a for cinematic look, and not about quality.
How many "fps" does the human eye see?
There are many aspects to this because the eye does not behave like a video camera or a film camera.The eye can see a flash that is much shorter than a microsecond if it is bright enough.But two flashes have to be about a 30th of a second apart before you can notice that there are two flashes.When movies were first projected at 24 frames a second, many people perceived annoying flicker. To overcome this, each frame was projected rapidly 3 times. This resulted in flashing the screen 72 times a second. The vast majority of people found this to be perceived as relatively smooth without flicker.Our temporal response in our peripheral vision is different from our central vision. We are more sensitive to motion and flicker in the peripheral vision.On the other hand, if you do a strobe light even at 60 or 100 times a second, you can perceive that a fast moving object is not moving smoothly but appears to stop at several spots along the way. This is a key observation. If you use CGI or a camera with a very high speed shutter, like 1/1000 second, you are going to be able to see discontinuous motion. However, if you take the same film, and project it at 30 frames per second with a shutter speed of about 1/30 second, you don’t perceive the flicker or the strobe effect. All you really need is about 30 frames a second. However, digitally generated action or high speed shutter cameras are going to cause a strobe effect to occur. It’s not that your eyes can see more frames, it’s that the strobe effect is actually in the film.Because the average film these days involves high speed shutters and CGI, it is the film itself that makes the action seem less than fluid and smooth. People go to higher speed monitors and interpolate frames to make the action smoother. But it’s not your eyes: it is actually unsmooth video with a strobe effect encoded in the video.