Behind the time cutting duel is a plus 5T HD dual photo metamorphosis

Not long ago, we visited a small medieval town in the outskirts of Beijing with four mobile phones of 5T / iPhone X / iPhone 8 / Xiaomi Mix2 and carried out a unique photo shootdown: using these four mobile phones In the same place, at different times for proofs shooting, using the phone to record the castle from the early morning to sunset light changes.

Simple and intuitive sample comparison We have seen, but what can we read from these images? The hidden information behind these proofs is worth exploring.

In the sunny midday, a plus 5T and iPhone X, iPhone 8's performance are similar, colorful white balance accurate.The proofs of these three phones are relatively good, but there is not any big difference between them, Millet MIX2 sample proof performance will be a lot worse, although the photo brightness looks better than the remaining three, but the overall color to be very dull, the whole picture made 'virtual'.

In the morning of the proofs of the performance of the evening, has been able to initially spy out a plus 5T camera advantage, in the comparison of the four phones, iPhone 8 and millet MIX2 are single camera, and a plus 5T and iPhone X Dual camera program is also very different, iPhone X dual aperture of f / 1.8 and f / 2.8 respectively, respectively, as a wide-angle and telephoto lens to provide twice the optical zoom capability, but in addition to nothing extra enhancements, proofs The performance of dual camera iPhone X and single camera iPhone 8 difference is not large.

While a plus 5T rear camera module consists of a 16 million high-resolution lens and a 20 million-pixel high-sensitivity lens when you shoot in the dark, 20 million pixels will be 4 pixels together into a smart Large pixels with a single pixel area of ​​2.0μm (micrometer) have a 4x sensing area and are more brightly shot, while a 16MP camera is in charge of imaging during the day.

As for what the four-pixel technology means, and listen to me in detail.

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We know that in general, to measure the performance of a light-sensitive components, we have to look at the area and then look at the unit pixel, the area directly determines the quality of output, the unit pixel and the amount of light is closely related.In other words, the size of the photosensitive element in the case, The larger the unit pixel area, the weaker light shooting picture quality is better, just as the original HTC UltraPixel camera by virtue of the then large 2μm pixel area in low light environment is very good.

However, the large unit pixel area is not full of advantages, especially in the mobile phone simply can not put enough sensors, that is, the sensor size is relatively fixed at that time the total number of pixels UltraPixel only 400 million, although the night imaging is excellent, But too few pixels in the daytime light but the limited number of mobile phone imaging level, especially the resolution.

A plus 5T cleverly avoided these two flaws - in a well-lit environment, 16 megapixel rear camera as the main camera, 20 megapixel that as a vice camera; and when the phone detects To the current camera darker grab mine is small, it will open the four-pixel technology, with 2m high sensitivity to bring more excellent camera experience.

Of course, for low-light camera to enhance, in addition to four-pixel combination of this full of creative and imaginative technology, in fact, there is a more conventional but also very practical - increasing aperture. Here is our late night winery A few photos taken in the town with a plus 5T.

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We have already discussed sensor size, unit pixel area, the total number of pixels on imaging quality, and this time we understand the issue from the perspective of exposure.Aperture, shutter and ISO are the three elements of exposure, for these three parameters Understand, there is a wonderful analogy.If a perfect exposure of the photos understood as a bucket of fresh water, then how to fill this bucket of water is needed to adjust the following three parameters.

This analogy is heard by every photographer

Aperture: Size of the faucet switch Shutter: how long the faucet opened ISO: Faucet above the filter

If you want to fill a bucket full, you just need to open the faucet and other water filled like, then the larger your faucet (aperture), the flow of time (shutter speed) is shorter, and vice versa also set the ISO Like the filter above the faucet, the higher the ISO (sensitivity), the larger the gap that corresponds to this filter. The larger the amount of water is, the more impurities (noise) in the water.

From the above analogy we can get the conclusion, in order to ensure a picture perfect exposure (for mobile phones may not be less than exposure), the larger the aperture, the shutter can be faster; the other hand, the smaller the aperture shutter The slower, to protect the photo into the light enough.

But we still have to understand one thing, the shutter time is the limit, especially for mobile phone camera.If the shutter time is too long, then it is likely because of the camera shake appear fuzzy dilemma.So at night or dimly lit When taking pictures of the environment, we generally have only two options to ensure sufficient light penetration: to increase the ISO of the camera or to use a larger aperture.

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This is why all mobile phone manufacturers have been trying to increase the aperture size.Although it does not mean that the larger the aperture of the dark mobile imaging must be better, after all, the level of imaging also by the photosensitive components, image processors, light path design and other factors However, if the other parameters are roughly the same, a large aperture means better dark light.

Why this one plus 5T did not use a plus 5 body wide-angle + telephoto dual camera program? This is the answer: In the current dual-camera program, the two cameras are selected f / 1.7 large aperture for mobile phone image quality improvement is Significantly, through the proofs can also see the night to enhance the aperture to enhance the ability to significantly improve the noise control capability has been significantly enhanced, the picture clearer and sharper.

Finally, HDR photography technology, HDR full name of the High-Dynamic Range (high dynamic range rendering), HDR technology is our last one to strengthen the ability of the secret weapon by increasing the unit pixel area and increase the amount of light to enhance the quality of After we open the HDR function, a plus 5T will be shooting multiple photos, the exposure of these photos will be different, in general, will be divided into different levels of under-burst, normal exposure and over-exposure, and will The photos are combined into a single, HDR composition that enhances the details of the dark and bright parts of the photo.

HDR mode is not turned on (top) Contrast with HDR mode on

Of course HDR's photo compositing is not always very effective, if your lighting is good enough at all.) And there's no sharpening highlights on the screen, so the result of the "HDR" is that the picture fades and there is no more Details at all, the overall level of decline in photos, so this time plus a 5T 'automatic HDR' mode is very important.

Instead of turning on the HDR, it's better if you have enough light

At this point, we have a secret about the hidden behind the "time cutting duel" has been excavated about a plus 5T in the current state of the art, the imaging conditions of good light conditions we have long been need not worry, a plus 5T has long continued Has always been a high standard, and this time the challenge of weak light camera is undoubtedly successful, from 4 in 1 pixel combination technology to double f / 1.7 large aperture to HDR technology software support, plus 5T in this The test gave us a satisfactory answer.

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