Traditional Culture Encyclopedia - Traditional festivals - Imaging Principle of Camera

Imaging Principle of Camera

The imaging principle of a camera is:

The lens of a camera is equivalent to a convex lens, and the light from the object passing through the lens of the camera will converge on the film, forming an inverted, reduced solid image. Compared with traditional cameras, which use "film" as a carrier for recording information, the "film" of a digital camera is its imaging sensor, and is integrated with the camera, the heart of the digital camera. The digital camera uses a photoreceptor to convert optical signals into electrical signals, which are then converted into analog/digital signals and recorded on a memory card.

And the eye has all kinds of things Traditional camera imaging process:

Through the lens to focus on the scene image on the film

The photographic sensitizer on the film changes with the light

The photographic sensitizer on the film changed by the light through the developer solution development and fixation to form

The photographic sensitizer is the opposite or the opposite of the scene, and then recorded on the memory card after the analog/digital conversion.

and the scene of the opposite or complementary color image Digital camera imaging process:

1. After the lens light focused on the CCD or CMOS

2. CCD or CMOS will be converted into electrical signals

3. processed by the processor, the record in the camera's memory

4. through the computer processing and display of the electro-optic converter, or printed by the Printed by a printer to form the image.

Specific process: digital camera is through the optical system to focus the image on the imaging element CCD / CMOS, through the A/D converter will be each pixel on the photoelectric signal into a digital signal, and then processed by the DSP into a digital image, stored in the storage media. Light from the lens into the camera, the CCD color filtering, light sensitivity (photoelectric conversion), in accordance with a certain arrangement of the photographic object "broken down" into a pixel, these pixels in the form of analog image signals transferred to the "analog-to-digital converter", converted into digital signals, transferred to the digital image of the camera. These pixels are transferred in the form of analog image signals to an analog-to-digital converter, which converts them into digital signals that are transmitted to an image processor and processed into a real image, which is then compressed and stored in a storage medium. The reflected light from the scene is converged by the lens to form a latent shadow on the film, which is the result of a chemical reaction between the light and the emulsion on the film. This latent image is the result of a chemical reaction between the light and the emulsion on the film. The image is then developed and fixed to form an image. The digital image of the camera and film imaging principle is different, it is through the lens imaging in the CCD, through the CCD photoelectric conversion, generating video signals, and then through the display electro-optical conversion, only to generate images.

Edited on 2018-03-30

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What is the imaging principle of a camera?

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How does a camera work?

The camera actually utilizes the imaging principle of a convex lens. A convex lens, let the focal length of f (convex lens can converge light rays, the point where the light rays converge is called the focal point, the distance from the focal point to the center of the convex lens is the focal length), the object distance (the distance from the object to the center of the convex lens) is u, then, when u>2f, in the convex lens on the other side of the placed on the other side of an opaque object, the physics is called the screen of light, can be in the screen of light on the same as the physical object can get an image, but the image is inverted and shrunken. this image is inverted and reduced. This is how cameras work. A traditional camera has a convex lens in front of it, what we call a lens, and this convex lens serves the purpose described above. Behind the convex lens is the darkroom, which holds the negative, which is coated with a light-sensitive substance. In the darkroom, the negative is sealed from light, so it is not light sensitive. When the shutter is pressed, the shutter opens and the light passes through the convex lens and into the darkroom, creating an inverted and reduced image on the negative. The shutter opens and closes very quickly, the fastest up to two thousandths of a second to complete. Professional cameras can also control the time the shutter opens and closes to expose the film for a longer period of time to achieve the desired effect. Since the focal length of the convex lens used in the camera is relatively small, it is always possible to make the photographed object outside the twofold focal length, and always form an inverted and reduced image on the negative. Dummy cameras, digital cameras and professional cameras are different again. Dummy camera only a convex lens, and can not adjust the exposure time, nothing to set up, the name is a fool can use the camera. However, this will not produce professional results. The difference between digital cameras and traditional cameras is that the negative is replaced by ccd. ccd is an electronic component, when there is light on it can be converted into electrical signals, when the lens to image the object in the ccd when the ccd is converted into electrical signals, a press of the shutter is the current photo is saved. Professional cameras generally also use the negative, but its specialty is in the shutter, aperture and lens. Professional cameras can control the opening and closing time of the shutter, so that the negative exposure longer or less. Aperture is to control the outside light into the darkroom intensity, when the outside light is very strong, if you shoot with a stupid camera, it will make the photo is very bright, so that you can not see, but a professional camera can control the aperture so that the negative exposure intensity is reduced. Professional camera lens is not a single convex lens, but a group of convex lenses, you can control the distance of these convex lenses to adjust the focal length, always make the most clear image on the negative. You can also install wide-angle lens and color filter instruments on the lens, the wide-angle lens to make a wider range of shooting, color filters to make the photo better color. For example, shooting a landscape picture, you want to make the negative more green, can have more intense color effect, install a green color filter on the lens, so that more green light through the lens. It is also not true that the above statement that small hole imaging cannot be applied to cameras. Due to the linear propagation of light, if you poke a hole in an opaque object, the light reflected from an object larger than this hole can not pass through the hole horizontally, but the light from the upper part of the object passes downward through the small hole, and the light from the lower part passes upward through the small hole, and an inverted image can be obtained by placing a light screen on the other side. So the small hole can also act as a convex lens to some extent. /i?tn=baiduimage&ct=201326592&lm=-1&cl=2&word=%d5%eb%bf%d7%c9%e3%d3%b0 These are the photographs taken with the principle of small-hole imaging.

17Likes-2,918Views2019-08-19

What is the imaging principle of the camera

1, framing: the light (image) through the lens, projected to the 45-degree placement of the reflector, refracted to the roof of the pentagonal mirror, and then through the pentagonal mirror of the two refractions, the projection of the eyepieces of the framing. The shooter that is through the eyepiece to see the same as the physical image of the upright. 2, shooting: the photographer presses the shutter, the reflector turned up, open the lens to the film (or CCD or CMOS) light path, the reflector at the same time to the light path to the five-ringed mirror blocking, to prevent stray light reverse through the eyepiece into the camera to affect the imaging. At this time, the aperture shrinks to a preset value, the shutter opens, the image recording medium records the image, the shutter closes, the aperture returns to the maximum, and the reflector returns to its position, ready for the next framing and shooting. In SLR cameras, the principle of film SLR and digital SLR is the same, only the recording medium of the image is different. Of course, because the recording medium is different, its structure also has a big difference. The above only describes the light trajectory of a DSLR camera, there are some other things such as aperture action, shutter control, flash control, metering and exposure combinations, ranging and focusing, and so on, which cannot be described here one by one. There are dual-lens reflex cameras. Such as the domestic seagull 4A, 4B, etc. is, before people commonly known as "square mirror box" is. Dual-lens reflex camera with two lenses, up and down placement, generally above the lens to view, below the lens to shoot. Because it is not equipped with five diamond mirror, so the photographer to see the image is up and down, left and right upside down, the operation of the view will feel inconvenient. In addition, due to the two lenses of the dual-lens reflex camera to separate the scene and shooting, so there will be a "parallax" problem, that is, the photographer to see the image range, not the shooting record to the range. The SLR camera is a more complete solution to this problem, because it is a lens to complete the framing, shooting, basically "what you see is what you get", but also the SLR has been the rapid development of one of the reasons. There is also a camera called "side axis", which takes the view through a special viewfinder window on the camera body, and the lens records the image. Because it is not through a lens to complete the viewfinder and shooting, that is, there is also the problem of "parallax". Is this OK?

5Likes-83Views2020-05-07

Principle of Camera Imaging - Find Answers Here

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What is the principle of Camera Imaging, the easier the better, the more common it is

What is the principle of camera imaging? p>

1. The lens of a camera is a convex lens through which light from an object passes to form a reduced, inverted, solid image on the film. The aperture controls the amount of incoming light through the size of the aperture, and the shutter controls the length of exposure through the speed at which it opens, and the two combine to control exposure. The film is coated with a layer of light-sensitive material in the light-sensitive case through the photochemical reaction of silver halide (the main component of light-sensitive film) to produce changes in light and darkness to record the image, after the development and fixation of the film becomes the negative, with the negative film to get the photograph. 2. Digital cameras just change the photographic film into a photographic element CCD or CMOS, light through the lens projected onto the surface of the photographic element, the light is the photographic element on the surface layer of the filter is broken down into different color light; color light is the filter corresponding to the photographic unit to perceive, and produce different strengths of the analog current signals, and then by the photographic element of the circuitry of the collection of these signals; analog signals converted into digital signals through the digital-to-analog converter, and then by the image processor to obtain the photo. The analog signals are converted into digital signals by a digital-to-analog converter, and these signals are then processed by an image processor before being transferred to a memory card for storage.

13 Likes - 951 Views2016-08-17

What is the principle of digital camera imaging?

What is the imaging principle of a camera?

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The imaging principle of the camera is:

The lens of the camera is equivalent to a convex lens, and the light from the object passes through the camera's lens and then converges on the film to form an inverted, shrunken solid image. The light from the object passes through the lens of the camera and converges on the film to form an inverted and reduced solid image. Compared with traditional cameras, which use "film" as a carrier for recording information, the "film" of a digital camera is its imaging sensor, and is integrated with the camera, the heart of a digital camera. The digital camera uses a photoreceptor to convert optical signals into electrical signals, which are then converted into analog/digital signals and recorded on a memory card.