Camcorder-Video Camera | How do the eyes fool the brain?
With any ordinary digital camera of today, your phone’s camera is undoubtedly capable of capturing awesome photos. Professional photography cameras or DSLR cameras have no answer. But the problem is that in the photo, this world is still and silent — where there is always something moving around us. Fortunately, camcorders or video cameras can take moving images of the objects moving around us and present the world to us accurately. You too can become the next YouTube star by managing your cellphone video camera efficiently on a movie camera or camcorder! Or start a career in a film production company — however, that’s a different story. Let’s talk today about how video cameras work, so let’s get started.
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Eyes and brain
Watching a movie camera or camcorder can feel like an electronic device. When you open it, you can usually see all kinds of mechanical and electrical equipment. But you know, camera lenses, processors, electric motors, or all the other electronics don’t have much to do with creating video footage. It’s all about your eyes and your brain.
If you take a lot of photos of different movements of the same object in front of your eyes very quickly, you will feel that those photos are alive or moving. For example, you can take a burst shot of your phone camera. Holding down the photo capture button on your phone’s camera will capture many photos at once, much faster. Now hold the camera of your phone towards a moving object and take a burst shot. After taking a shot, browse the photos very quickly or create a slide show — you will see in front of your eyes when the photos are moved quickly, you will feel like you are watching a video.
This is not actually a video, it works using your Persistence of Vision. Let’s take a little idea about how our eyes see an object. Light is reflected from an object and travels through your eyes to your brain. At first, an inverted image of the object is created inside your eye and after it reaches the brain it helps to see the real object again. In this way, as long as the object is in front of your eyes, light comes from it to the eye and the brain sees it. But even if an object you see is suddenly removed, it does not immediately disappear from your brain — its existence remains in your brain for a while. This is called persistence of vision. You can watch this video to make the matter clearer.
How does the camcorder work?
Today’s digital camcorders or video cameras work completely differently from previous classic cameras. Classic cameras were a much larger mechanical device, and they could take pictures one after the other in a huge, long plastic film. These images were later collected and quickly removed from view and the video could be viewed. Classic cameras used to work in analog mode, because it saves the picture directly as a picture. But in a digital camera, the picture is stored as a number or digit.
Classic movie camera
The classic movie camera works a lot like the old plastic film camera. Older plastic film cameras needed to open the shutter and take in the light when taking photos, and the film inside would move one after the other. But the movie camera needs to constantly open and close the shutter — it usually opens and closes 24 times per second. With the shutter open and closed, the plastic film inside also needs to be rotated continuously so that it can capture all the photos frame by frame. This long plastic film is then inserted into a projector machine — where the photos in the film change position very quickly, one after the other, and you see the final result as a video or moving picture.
Digital video camera
When the first video camera was invented, plastic film was replaced by magnetic plastic video tape. It is much cheaper, easier than film and does not require any development before using it. Today’s modern electronic digital video cameras use digital video. These cameras chip the information from a light-sensitive chip lens into a digital format without taking a photo of an object directly — this microchip is called a CCD. In other words, every frame in a digital camera is not stored directly as an image but as a digital format or number. And since its video is in digital format, it can be stored on DVD, various flash drives, hard drives, etc. If you want to save the video in digital format, you can edit it on a computer, upload it to a website, copy and play it on different devices, which was never possible with the previous classic video recording.
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Hopefully from today’s article you can easily understand how the video camera works and how your eyes display the photo as video by deceiving the brain. I will write a more detailed article on digital cameras and also discuss some technical terms with simple explanations there. If you have any questions about today’s article, be sure to comment below and share your video recording experience with us.