The difference between triple camera and dual camera

Technology is becoming more and more advanced, and people’s pursuit of buying mobile phones is getting higher and higher. In the past, we were only pursuing ease of use and durability. Now we are pursuing games without lag and beautiful photos. Now, the requirements for taking photos are getting higher and higher. Merely measuring pixels is no longer enough. People’s requirements for mobile phone cameras have increased.

What is the difference between triple camera and dual camera?

1. Increase the photosensitive area.

Basically, friends who know a little bit about the photography industry should know that there is a saying called "The bigger the photosensitive area, the more it kills people." This means that if the photosensitive area is large enough, the excluded photos will be clearer and more noisy. few. This is easy to understand. The larger the photosensitive area, the more external light the camera can sense in the same period of time, which is of course more conducive to taking pictures.

The picture below shows the areas of photosensitive elements of different sizes. The photosensitive element of a mobile phone is about as big as the lower left corner, and the largest frame is the photosensitive element area of ??the current mainstream "full-frame" camera, so you can see how obvious the difference is when you compare them.

So mobile phones also hope to add larger photosensitive elements, but even if they can be equipped with photosensitive elements, the camera still cannot be so large, so mobile phone manufacturers have come up with a way: use several cameras without Is that enough?

Don’t the sum of the photosensitive elements of the three cameras equal a large photosensitive area? The specific method is to take three photos and then find a way to synthesize them, which can enhance the picture quality of the mobile phone. effect.

2. Increase the shooting range.

We know that the camera lens has a very important parameter called focal length. Lenses with different focal lengths can capture different things. For example, wide-angle can capture more scenery at the same position. Focus allows you to capture distant objects

And lenses with different focal lengths produce different effects on the scene. Below is the effect of placing the camera in the same position and using lenses with different focal lengths.

Because the space available for the lens on a mobile phone is very small, it is obviously difficult to change the focal length of the mobile phone lens. Therefore, if you use multiple cameras with different focal lengths for each camera, you can Achieve the purpose of changing lenses and photographing scenery with different effects.

3. Add blur function.

Many people may know that there is a very important concept in photography called "blurring", which means that because the lens aperture is relatively large, objects that are not on the focus plane will not be captured clearly - so it can Reveal the subject.

For example, in the picture below, except for the flower in the center, the rest of the scenery is blurry - this is blur, which can bring better effects to the photo.

But it is difficult for mobile phone cameras to do this - because the larger the photosensitive element and the larger the lens aperture can be, it can be done. So mobile phone manufacturers thought of another way - our dual camera or multiple cameras.

Since there is a certain distance between the two cameras, the scenery captured by the two cameras is different. By calculating the slight difference between the two photos, you can get the distance of the object in the photo from the camera. Distance is similar to how a person’s two eyes can judge the distance of an object.

Then according to different distances, you can add a filter to artificially blur objects outside the subject to simulate the effect of lens blur.

Summary

To put it simply, dual cameras and multiple cameras on mobile phones are designed to achieve better image quality, richer focal lengths, and simulate large apertures in a smaller mobile phone space. The blurring effect that only the lens has - in short, I hope that the mobile phone can achieve better photographic effects.

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