From the end of last year, Huawei Mate 8, the Sony's new 16 million pixel image sensor officially appeared in the smart phone. After the millet phone 5, OPPO R9 Plus, nubia Z11, vivo X7Plus and many other mobile phone manufacturers flagship machine also left the main camera position sensor. The author selected two relatively new flagship machines and readers to share IMX298 imaging performance and characteristics. Summarize the common characteristics of this 16-megapixel sensor, and also look at the nubia and vivo separately optimized and tuned IMX298. Coincidentally, these two mobile phones respectively used the Xiaolong 820 and Xiaolong 652 two different SoCs from the Qualcomm platform. The difference in focus, HDR synthesis, and continuous shooting speed was not enough. Image tour.
Use nubia Z11 in the car to quickly capture the scenery outside the window
The IMX298 is a 16-megapixel sensor that natively supports phase focusing technology. It also incorporates DTI quality enhancement technology similar to Samsung's ISOCELL pixel structure, which can improve nighttime brightness and noise reduction to a certain degree. It supports hardware HDR function and can be acquired when recording video. With a higher dynamic range, the details of the highlights and shadows are even more restored. Nubia Z11 with IMX298 with optical image stabilization lens group and has 6P lens and F2.0 large aperture lens, support LTM real-time color and 3D noise reduction, handheld electronic aperture and other technologies. The built-in nubia camera family is rich in features and supports DNG straight out of photos for post production.
Nubia Z11 digital zoom records aircraft trails
Although vivo X7Plus is not equipped with optical image stabilization technology, and the main soft front self-timer, but after using the main camera performance feels no less inferior to the front performance. The second-generation compound eye anti-shake and night scene enhancement algorithms developed by Vivo Optical Labs and Arcsoft, as well as the two-way image stabilization algorithm in sport mode, have shown remarkable performance.
Thanks to the outstanding performance of Snapdragon 820 and Snapdragon 652, both have a built-in dual ISP, and the former is even upgraded to the new 14-bit Spectra ISP. Both models have greatly improved focus, HDR composition and continuous shooting speed. Of course, there is still a certain distance between the benchmarking machine and the mobile phone. Incidentally, Lenovo's ZUK Z2 series of two Xiaolong 820 models in the HDR synthesis and continuous shooting speed is also relatively fast, that is a little weak at night focus, often not on the coke.
Vivo X7Plus digital zoom records aircraft trails
It is worth mentioning that, thanks to the increased speed of mobile computing, nubia's handheld electronic aperture and ultra-clear picture quality can be completed without using a tripod, which greatly improves the practicality of these two functions. It's not a problem that you want to take pictures of atomized water, ambiguous images, and resolving power.
Vivo X7Plus digital zoom captures evening sunset
According to the convention, all the proofs of this article use the maximum output pixel value of the two mobile phones for shooting, that is, 16 million pixels, and at least 5 consecutive shots in the same scene, among which the most stable one is chosen as an example.
Nubia Z11
Vivo X7Plus
One beat can be found in the white balance adjustment of the two mobile phones selected different algorithms, vivo looks more like the feeling of sunset, sunset warm atmosphere. However, nubia was more in line with what the naked eye actually saw. At that time, it was only in the afternoon and it was not until the evening. The IMX298's imaging quality has improved considerably compared to the IMX214 a few years ago. The performance of the sun and clouds in the central area is as good as that of a card machine. Carefully discover that you are able to see the layering of the clouds and that the spit area is just right.
Nubia Z11
Vivo X7Plus
In the past, the author often relied on the HDR mode, hoping to show all the details of the scene with large contrast between light and shade. After a few years of shooting, it was discovered that sometimes we don't necessarily need to present all the highlights and shadow details. The proper shadows are actually beautiful for the picture. This scene, nubia and vivo, still shows two different white balances. In the past two years, the industry has seldom commented on the accuracy of white balance, and people are comfortable with it. Sometimes we don't have to be as exact as what Samsung and Apple's benchmarking machines really look like. Perhaps the overly realistic white balance may not be able to contribute to the photos.
Nubia Z11
Vivo X7Plus
IMX298 resolution is still very strong, 16 million pixels is not undeserved reputation, water ripple details, character costumes, stones and fences do not have to zoom in to see thousands of machines and differences. The ripples on the surface of the water, waves of waves, and glittering visual effects are all in place. Natural scenery or cultural style panoramic view, photography is to let the fleeting scenes last, always preserved.
Nubia Z11
Vivo X7Plus
People with narrow-mindedness need to watch the sea frequently, so I occasionally perform this visual therapy. Perhaps when we see the vastness and endlessness of the sky and the sea, we find that we are so small, and the pent-ups and annoyances in our hearts are so great for ourselves, but for nature it is actually nothing. Saying that I haven't seen a red screen in vivo for a long time, I was able to see it occasionally in the vivo Xshot and vivo X5Pro. After that, vivo X6S Plus and vivo Xplay5 basically eliminated this problem. Did not think vivo X7Plus in some scenes re-emerged this white balance reddish phenomenon.
Nubia Z11
Vivo X7Plus
Nubia is still more true to restore the ambient light at the time, vivo or go sunset style. For this scene, the adjustment of vivo caused this picture to become a bit strange, the sky part seems to be shrouded in the fog, the perception is not enough nubia transparent and natural. It is worthy of recognition that the details of the two models in the sky clouds and water surface ripples are quite impressive. IMX298 looks easier to adjust than IMX214.
Nubia Z11
Vivo X7Plus
Since the aperture values ​​are similar, the difference between nubia and vivo blurring effect is not obvious. At the same time, the white balance preference can still clearly distinguish which one is nubia and which one is vivo. We only look at the tendency of the tiles and railings to color. The nubia floor tiles are partially blue, and the violet rails are reddish. Even though the sun is shining, the violet rails can still reduce the yellow ratio.
Nubia Z11
Vivo X7Plus
Vivo X7Plus seems to have automatically added Dusk Filters to the proofs again, which caused the overall look and feel a bit like the iPhone's adding a layer of LOMO filters. This automatic white balance adjustment method is different from person to person, but most people estimate that like nubia Z11 that kind of transparent blue sky, right? Although both samples have a halo effect, they do not affect the overall look and feel. It is worthy of affirmation that vivo can clearly restore the signboard text without turning on the HDR mode.
Nubia Z11
Vivo X7Plus
When it finally came to a real sunset, nubia and vivo were tied in this scene, both in terms of white balance and reflexivity. The sky cloud layering and the shock of the screen are basically the same. I always like to pick up the details, each sample must be enlarged and enlarged to see the resolving power. This estimate is also a manifestation of narrow-mindedness. In fact, sometimes it is far from the subject. Going backwards, you may find that more beautiful things are on your side.
Nubia Z11
Vivo X7Plus
Often criticized by those predecessors in the world, they must go to these places to take pictures. The photo proofs are considered normal teachers. Now came to the field trip and found that some angles and scenery are indeed worth a shot. The bridge extends indefinitely, as if it can't see the margins. No one in the future will know, only to know if the other side is the end. On the other hand, in the evening, the performance of vivo and nubia was very similar, and it wasn't really telling which tablet was taken by which cell phone.
Nubia Z11
Vivo X7Plus
This set of proofs reminds me of the nubia Z11 official posters without borders on the advertising map, feeling that this shooting angle shot can always hold the master, forcing full. Several photographers beside him were holding SLR cameras while I seemed to make a fuss in the classroom. In fact, I admire them very much. With so much luggage and equipment, don't you feel tired? But I still have to spit a little about vivo. Whenever I'm in this scene with clear lines and symmetrical scenes, I always open the 9-cell grid view mode manually. Nubia Z11 and One Plus Phone 3 are all there. , But from the introduction of professional mode in vivo Xshot, after a few years until the vivo X7Plus still did not join the quintessence, golden dividing line and other framing features, no grid line is indeed not very convenient.
Nubia Z11
Vivo X7Plus
The same F2.0 aperture, we will focus on the right lock on the flowers, nubia and vivo blur the same degree of degeneration, while the IMX298 resolution is still quite high, the texture and petals on the texture between the level of expression in place. Focusing and metering point separation, professional mode, long exposure, and other camera games, two mobile phones will naturally not be missing. Next, let's take a look at the drug testing process.
Nubia Z11
Vivo X7Plus
The white balance of this scene does not know where to go, apparently inconsistent with the scene seen by the naked eye, the yellow of the desktop is like adding a layer of filter automatically. In addition to this, the resolution and exposure control, blur level is nothing different. Saying that gold cakes are often eaten, like this restaurant is relatively rare, the gold cakes that were tasted before are all cubes or cuboids. This type of gold cake is a bit like a crab roll of a hot pot and I'm hungry.
Nubia Z11
Vivo X7Plus
Strangely, vivo did not add color to the gold cake in this scene. I thought it would automatically append the LOMO filter. Instead, Nubia inherited the style of vivo. The gold cake appeared yellowder than the naked eye. Really do not understand what these good buddies are doing.
Nubia Z11
Vivo X7Plus
Similarly, after the appetite is pulled in, the white balance of vivo is obviously not as yellow as nubia. What did the buddies actually do in private? You yellow so many times, this time it's my turn yellow? The key to the success of drug testing is to be able to evoke our appetite. Do you think these officials have appetites?
Nubia Z11
Vivo X7Plus
In the end, I discovered the law, as long as the scope of vivo's viewfinder was extended to the desktop and the table and food were taken into the camera at the same time, the vivo proofs would show a white balance that was more yellow than nubia. It turned out that this is the basis code for both of them. I understand. Urbanites eat more vegetables and fruits. They usually work in busy offices and are prone to constipation and acne.
Nubia Z11
Vivo X7Plus
Time came to night time. In order to be fair, we turned off the night view mode of the two mobile phones. After all, the imaging mode of the night view mode is not very good, and the brightness is noisier. After that, the smearing algorithm is still used to make up for this side effect. Finally, Will smear some of the details. The performance of nubia Z11 is very close to the actual situation seen by the naked eye. Vivo X7Plus has improved its exposure and obviously wants to achieve a night-vision level effect. Unfortunately, there is no optical image stabilization in the case of lost details are more serious, smear algorithm side effects, the following sample vivo will use similar exposure control, I once thought that did not close the night mode.
EXIF information (nubia VS vivo)
It was confirmed that both phones have turned off the night mode, but why is the brightness of the vivo X7Plus proofs so much higher? Even more incredible is when we look up the EXIF ​​information on the photos of the two mobile phones and find that nubia's exposure control is more aggressive than vivo, with longer shutter times and higher ISO values.
Nubia Z11
Vivo X7Plus
Vivo still shows higher brightness, but there are more noises in the sky, but this time we still emphasize the consistent principle. We must first take a good picture and then talk about it, so the vivo adjustment method is still worthy of reference. According to reason, nubia Z11 with optical image stabilization should also follow this approach, but it is counterproductive and nubia's resources are not being used properly. IMX298 has DTI quality enhancement technology, similar to the Samsung ISOCELL pixel structure, so it can increase the brightness of the night scene to a certain extent while reducing noise, and perhaps vivo is more reliable for DTI technology. Of course, the combination of Vivo Optical Lab and Arcsoft's compound eye anti-shake and night scene enhancement algorithms is also a must, but unfortunately since vivo Xshot began, vivo hasn't added optical anti-shake lens sets to mobile phones anymore.
Nubia Z11
Vivo X7Plus
Nubia is still in order to retain more details so did not engage in the brightness up, careful smear algorithm, perhaps nubia on the optical image stabilization lens set similar to the iPhone 6 Plus, just to reduce picture noise and increase brightness. Vivo is open in the middle of the door, the screen brightness is higher, but smearing details can still be seen, the building near may not be obvious, we put the line of sight to the building wall in the distance can clearly feel nubia Z11 more abundant details .
Nubia Z11
Vivo X7Plus
Two mobile phone glare control of the streetlight is still the usual Google Fan children. It seems that the iOS camp has the skill to adjust the streetlight. The Android camp mobile phone has to learn slowly. Of course, the performance of vivo is relatively unsatisfactory, and the glare has been similar to the aforementioned Samsung K Zoom, which can clearly see the rainbow pattern. At the same time, the flood X7Plus's floodlight reduces the contrast of the picture. Of course, the overall brightness of the picture is still superior to vivo.
Nubia Z11
Vivo X7Plus
Vivo's floodlights still reduce the contrast of the picture, causing the sky part to become less dark. Nubia is a better interpretation of this atmosphere, but the two mobile phone scenes have appeared a certain degree of ambiguity. Optical image stabilization, extended shutter times, high ISO, large aperture, and DTI pixel isolation technology can hardly alter night performance in some extremely dim situations. Of course, what I want to express is only the wavy texture of the sea. Both phones are in place.
Nubia Z11
Vivo X7Plus
The brightness is still slightly better than vivo, the premise is not to look at the sky area. And vivo is more susceptible to light effects, is more sensitive to the color of the light, the light can easily change the color of some areas tend to, you will find vivo proofs more than nubia more color changes, the overall dark tone is not as strong as nubia .
Nubia Z11
Vivo X7Plus
We have changed the scene and vivo has returned to a favorable position. For example, the above vivo-tuned scene-refining algorithm is undoubtedly more reasonable, and nubia appears to be somewhat dim and overly conservative. Experienced nubia My Prague has similar practices before, but it is a model without optical image stabilization. Nubia Z11 has OIS lens group.
Nubia Z11
Vivo X7Plus
In fact, the resolution of IMX298 is not weak, we can see the small details in the distant building without zooming in on the proofs. On the other hand, Xiaolong 820 and Xiaolong 652 two sets of SoC and built-in dual ISP can still operate at night. In the daytime, light is sufficient to rely on phase focus basically to get all the focus scene. In the evening, the phase focusing system malfunctions, and it is only possible to rely on the contrast focus to solve the focusing problem. At the same time, whether or not the photograph can be quickly recorded without turning on the HDR mode, and whether the shutter speed can be increased by pressing the shutter is very important for the filming rate. Otherwise the vague details will make you very crazy.
Nubia Z11
Vivo X7Plus
We focused our attention on the trees on the edge of the photo. The detailed restoration of the IMX298 at night was still remarkable. Compared with the IMX214 and IMX278, it improved. However, compared to the progress in the daytime, it was still not large enough. This is also a common problem in mobile phone sensors. . In time, if larger sensors are stuffed into the phone, it may be able to further improve nighttime resolution. Otherwise, how can there be a bottom-level pressure on the person? High ISO, large aperture, optical image stabilization and other measures can only improve the brightness of the screen as much as possible, and the task of depressing noise and resolving resolving power has to rely on the introduction of a large-bottom sensor.
Nubia Z11
Vivo X7Plus
In the last scene, the author did not make mistakes in the proof position. The vivo X7Plus did better. After the long exposure function was turned on, we fixed the two mobile phones to capture the effect of Ambilight, nubia Z11 was more exposed to overexposure, and then shortened the exposure time to improve the degree of overexposure, after all, more optical image stabilization lens group, so The exposure time certainly does not need to be that long. Unfortunately, everyone has noticed, nubia Z11 proofs appeared strange large areas of dark spots, and continuous shooting multiple proofs, the return rate is 100%, it is estimated that the camera module is not adjusted well, waiting for the firmware firmware to fix this bug . Previous experience with nubia My Prague and other models did not have similar problems. The author has carefully observed the lens and the lens, and there are no problems such as smudges and cracks. If it is a sensor problem, why the scene does not appear similar to other scenes during the day and night, it should be a system bug.
Summary : Tuning and actual performance of the nubia Z11 and vivo X7Plus are still able to afford the IMX298 sensor. The 16 million pixel detail is not discounted at least during the day. On the other hand, the two mobile phone latitudes and exposure control processes in the daytime scene are relatively in place, and the white balance of vivo needs to be improved. In terms of nightscapes, both phones have their own advantages. nubia needs to raise the brightness appropriately. This can be remedied by turning on professional mode. Optical image stabilization still cannot be idle. However, the problem of dark spots will become serious with the extension of exposure time. Vivo X7Plus can reduce the exposure by opening the professional mode, so that the screen is more pure and the detail smearing phenomenon will be reduced.
In terms of human-machine interaction, vivo or grid line function as soon as possible, for the viewfinder point of view to choose immediate results. The focusing speed and continuous shooting speed are remarkable among the Xiaolong 820 and Xiaolong 652 models, but the HDR synthesis speed still has a distance compared to the one-plus mobile phone 3 and even 15 years of Moto X (Shaolong 810). Especially at night.
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