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[Others] [Tech Talk Vol. 29] How Much Do You Know About Mobile Phone Camera?

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17:15, Sep-06-2018 | From PC
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Hello Mi Fans,
Greetings from MIUI Global Forum. Welcome back to Tech Talk Series. In these series, we will discuss you some tech related topics to enlarge your technology knowledge. Today, I will discuss you about Mobile Phone Camera. So Let's get started.

As the most important component of the mobile phone structure, and as the current demand for more photos, the quality of the camera gradually becomes a consideration for buying mobile phones of people. However, mobile phone camera parameters are more single and more annoying. As a general consumer, how do we know whether a mobile phone camera is good or bad? Now, introduce yourself to a mobile phone camera from a hardware perspective.

Pictures.png

A mobile phone camera imaging policy is similar to that of a camera, that, our physical aperture imaging (lens imaging) policy implies that some vocabulary names can easily be replaced by our well-known principles. Furthermore, because the actual picture experience of our mobile phone is not only dependent on camera hardware, but software algorithms and many other reasons, this article only discusses the mobile phone camera from the hardware parameter perspective, please forgive me

First of all, talk about pixels.

Pixel.jpg

This is one of the most intuitive information we have when purchasing a mobile phone, and it is also a point at which many of the people have focused on salespeak, so let's first talk about it. Pixel has a functional pixel and a section of the largest pixels. Digital images are saved in pixels (pixels) and each pixel is the smallest unit of a digital photo. Large pixels, larger area of ​​the photo. Effective pixels in English are effective pixels. Unlike most pixels, the effective number of pixels is the value of pixels that are actually involved in photographic imaging. The maximum pixel value is the true pixel of photosource. The biggest pixels are valuable using the digital algorithm. In general, the size of the pixels represents the final resolution of your photo. Theories, larger pixels, larger photo areas, and more pictures can contain it, and that's it. One of the many parameters of pixel mobile phone cameras It's not pixel high, the picture is good. Please give this special attention.

Then let's look at the Apparture

Apparture.png

Aperarya is an instrument that controls the amount of light in the lens and in the body. It's usually inside the lens. We use the value to display the aperture size. If you look at the physical aperture imaging policy, the aperture is equivalent to the size of the small hole. In theory, the larger aperture, the amount of light is large. On the mobile phone, aperture is a specific value, and the parameter xx is expressed in the form of. Number small, big aperture. The laser aperture helps in filming at night, because the light is so bright that the photos will be bright.

Let's talk about the type of camera.

Camera.jpg

Initially, the single camera was a color camera, there was nothing to say. But in recent years, with the presence of double or even three shots, many more types of cameras appeared in our viewpoint. Now more common color are black and white, Black and white color can get high definition pictures, color lens color information, records recorded in black and white records. Among Huawei and other manufacturers, this combination can achieve the effect of an electronic large aperture in the formation of a background blur. Wide-angle  telephoto can achieve optical zoom and background blur, and the iPhone 7 Plus uses this combination. These two combinations have their own advantages, which can improve our camera imaging.

Then we talk about the sensor.

Lense.jpg

The sensor is CMOS, which is responsible for the recording image. This is like the light screen of our retina or small hole photo. The image presented will reflect it, electrical signals will be converted and the image will be sent to the processor, and then the process will be processed by the CPU and the output on the screen. The most famous suppliers of Sensor are Sony, Omnivision (OV), Samsung and so on. Among them, Sony is one of the best, and most of flagship cameras are supplied by it, and only it has the best commercial sensor, the Sony Sensor has been named in the form of IMXxxx, where a number of small x. Although we know that big numbers, well, but Sony's naming process is more complicated, there are some well-known assessment organizations to evaluate where you can buy special performance before Baidu's model.

Finally, let's talk about the rest of the thing

OIS optical image stabilization, the principle is that when the ziroscope of the lens detects a small movement, the signal will be sent to the microprocessor, calculating the amount of displacement for immediate reparations, and compensating the lens group according to the vibration of the lens. And the amount of displacement is low in the camera Blarake of the image caused by the change to affect the compensation is provided. For the moment, the two axis ultimate optical image stability, four-axis axial image stability and so on. In theory, the greater the number of axes, the more anti-shock will be effective, because more instructions can be given, and the "axis" indicates the direction. It is notable that in addition to the optical image stability, there are digital image stabilization (electronic image stabilization). Electronic anti-shake is primarily the anti-shake of the digital camera, which uses increased growth of CCD sensitization parameters by increasing the speed of the socket and analyzing the images obtained in the ccdid, and then using the edge image to compensate. Electronic anti-shake is actually a type of reducing image quality reduction. Compensation for Jatta, this technique attempts to strike a balance between photo quality and picture jattar. Compared to optical image stabilization, this technology costs very little (in fact it only needs some adjustment to the internal digital camera internal software) and the effect is also poor. So please pay attention to whether it is optical image stability or digital image stable. ISP (Image Signaling Processing) Image Signal Processing It is basically used to process the transmission process of front-end image sensors that match with different manufacturers image sensors. These things are usually integrated into the SOC, we basically have no choice.

T
his is today's  discussion,  Some texts and images come from the internet by Google search. If there is a violation, please contact for deletion.

Thanks to Admin @candicesu for her effort. Special thanks to @farowa_Bug_Mid & @skbddn_Bug-Mod for this great  idea to write on this topic.

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