How many Frames the Human Eye Sees per second? Myths and Facts
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How many Frames the Human Eye Sees per second?
How many Frames the Human Eye Sees per second was a myth, that the human eye sees a maximum of 24 frames per second till 15 to 20 years.
Everyone has heard the myth about the 25th frame at least once. Until now, many are convinced that the human eye can perceive a maximum of 24 frames per second.
However, this is a huge misconception. People believed in the 24-frame bike even 15-20 years ago, when CRT monitors were ubiquitous, clearly refuting this statement with their flickering.
Moreover, Human Eye is a paired sensory organ that reacts to light and allows vision.
The rods and cones in the retina are photoreceptive cells capable of detecting visible light and transmitting it to the brain.
Eyes signal gives the brain information to identify color, shape, depth, movement, and other characteristics.
The eye is one of the parts of the sensory nervous system.
Like other mammals’ eyes, the photosensitive retinal ganglion cells that do not image the human eye receive light signals that affect pupil size regulation.
Where did the myth about 24 frames come from?
The myth that the human eye sees a maximum of 24 frames per second has a century history.
It is rooted in the early days of cinematography. The first films, shot at the end of the 19th century by the Lumière brothers, were 16 frames per second.
The flow rate of a standard 35 mm film at this frequency was precisely 1 foot per second.
It simplified the calculation of the required amount of film for filming.
The need to increase the frequency arose with the transition from silent to sound cinema.
Those days, track the picture in the stripes form, each of which corresponded to a specific frequency.
The short length of the film, scrolled in a second (only 30 cm), did not allow recording sound enough, so its size increased.
It also decided to increase the FPS to 24 for a reason. Film flow per second was now 1.5 feet; the minute flow rate was 90 feet or 30 yards.
These figures also proved to be convenient for calculations when planning a shooting budget.
They tried to increase the frequency and more, up to 30, 48, and even 60 frames per second, but problems arose.
This speed required more accurate and robust equipment, and film consumption increased significantly.
In addition to the film’s cost, the cost of editing, and the time for its production also increased.
In the end, they all stopped at 24 frames; this frequency has become the industry standard for many decades.
How many frames per second the eye sees
1. While watching video
Human vision is not a discrete system. The capabilities of which can be described in simple numbers about the camera.
It writes video in a resolution of 3240×2160 pixels, with a frequency of 60 frames per second.
And the human eye sees precisely the boundaries only if it looks at the developed film or digital video storyboard in the editor.
The visual system perceives the picture as a whole, noticing only its changes.
Therefore, there is no specific figure indicating the limits of the eye’s capabilities.
If the image does not change, there is no difference; 5 frames, 25, or 250 frames will change per second.
The limits of perception strongly depend on the characteristics of the observed object.
The faster it moves, the sharper these movements – the higher the limiting frequency.
Comparison of 5, 10, 15, and 30 frames per second on a slow picture
2. While Watching Video, running, Running in a zigzag manner and jumping
Watching a video in which a person strides in a straight line, the eye will not notice a significant difference between 24 and 60 frames per second since the movements are smooth.
If this person is running fast, there will already be a difference; a 60 FPS video will seem softer and more enjoyable than a 24 FPS.
And suppose this person does not just run, but runs in a zigzag manner, simultaneously jumping over obstacles.
In that case, even the difference between 60 and 120 FPS will be noticeable, in favor of a higher frequency.
Comparison of 12, 18, 25, and 60 frames per second in dynamic video
You don’t have to go far to verify this. It is enough to run a massive toy on your computer first at low settings to get high FPS, and then at high or maximum locations to get less than 30 FPS.
You will instantly notice the transformation. In the first case, the objects will be less detailed, but the movements will be much smoother.
Seeing the difference between 30, 60, and 100 FPS, you can see that the human eye sees much more than 24 frames per second.
The limit after which the difference becomes invisible depends on the individual characteristics of vision.
In the case of video or a game, it is 80-150 frames per second, and sometimes even more.
3. While watching Television and cinema
The myth’s origin is probably related to the limits of Television and cinema.
Limited The film recorded on film to 24 frames per second for practical purposes.
Suppose there is a declining return on the number of frames that people can claim to notice.
In that case, the visual difference between 24 and 60 frames per second can’t justify doubling the amount of film required to shoot a movie.
With the advent of simple digital storage, these limitations are no longer arbitrary.
The numbers, also known as the mythical “maximum” the eye can see, are 30 frames per second, 40 frames per second, and 60 frames per second.
The 60fps limit, in my opinion, is because most PC monitors (many TVs now) have a maximum refresh rate of 60Hz (or 60fps).
If the monitor is limited to 60 frames per second, the monitor cannot physically display more than 60 frames per second.
It is the unique purpose of frame limiting, Vsync, and refresh rate adjustment in video games.
What is the (FPS) Highest Frame Rate that can be recognized by human perception?
Myelinated nerves can fire 300 to 1000 times per second from the human body and transmit information 200 miles per hour. What’s important here is how often these nerves can ignite (or “send messages”).
The nerves of the eye do not deviate from this limit. The eye can transmit physiologically fast data, and the eye/brain can work together to interpret up to 1000 frames per second.
However, we know from experimentation (and simple anecdotal experience) that the number of frames per second that humans can discern is reduced.
The human eye and brain can infer up to 1000 frames per second, but a person sitting in a chair can interpret up to 150 frames per second on average by actively guessing how high the frame rate is.
The point is, 60 frames per second is not a waste of time. One hundred twenty (120) fps is not a waste of time.
There is a noticeable difference between 15 and 60 frames per second. Many would say there is a noticeable difference between 40 and 60 frames per second.
Finally, the human eye limit is not as low as 30-60 frames per second. Not true.
Fact about Human eyes Frame rate
Human Eye can Physiologically detect up to 1000 frames per second.
The average person tasked with determining the frame rate you’re looking at can accurately guess up to about 150 frames per second.
It means you can see the difference in a frame rate of up to 150 frames per second.