This generation of iPhone 7/7 Plus is born full of everyone's expectations. How much will the photo taking of the new iPhone be improved by being transferred to the 4.7 inch iPhone's optical anti shake, A10's unprecedented ISP computing performance, and the newly introduced Display P3 color gamut standard? As well as between iPhone 7 and 7 Plus, will there be any obvious difference in taking photos?
The main camera sensor of iPhone 7/7 Plus maintains a unit pixel of 1/3 inch, 12 million pixels and 1.22 microns. The visible difference is that the display P3 standard output sample is used instead and the aperture is increased to f/1.8 (the actual light input is increased by 50%). The former affects the color of photos and brings "pain" of sharing photos, while the latter brings stronger weak light performance.
Photo experience
The improvement of the two new iPhones is mainly focused on focusing, which is slightly faster than the previous generation, but there is still a significant gap with the dual pixel S7/Note7. The white balance during shooting is obviously warmer/yellower than that of the previous generation. Although it is not very pleasing to the eye, it is indeed closer to what the naked eye can see. The iPhone 7/7 Plus is more accurate in judging the white balance of indoor lighting. The rest of the shooting smoothness, shutter response and imaging speed are not different from those of the previous generation. It seems that the powerful performance of A10 processor cannot be shown for the time being.
Display P3 gamut problem
Color gamut coverage size contrast
Before talking about the iPhone proof, we need to popularize the color gamut of Apple's Display P3. Display P3 has a color gamut range close to Adobe RGB, but the coverage position is different, and the color gamut range is far larger than the current mainstream sRGB. The color gamut of Display P3 and DCI-P3 is mainly that the former maintains the Gamma2.2 of sRGB color gamut and the color temperature of 6500K white dots (Gamma 2.6 of DCI-P3). The translation is the iPhone 7/7 Plus screen and sample, which has a wider range of cyan and orange than sRGB color gamut and can display more color levels, but other parts have little change.
For most computers and mobile phones with non wide color gamut, even most of Apple's own products (excluding 9.7-inch iPad Pro, 5K iMac and a few other machines), they are not compatible with the iPhone 7/7 Plus's Display P3 color gamut swatches. If you view them directly, red and green will fade and gray. This involves the conversion of color coordinates, for example About Explain the reasons (both values and proportions have been exaggerated):
Because the Display P3 sample can cover a wider range of red and green, if the red/green highest point of the sRGB device is 100, and the red/green highest point of the new iPhone sample with a wider color gamut is 200 (the proportion is less than 100%, and exaggerated processing is carried out here to facilitate understanding and calculation). If the same red green object is 40% red in the sRGB color gamut, it only needs 20% red in Display P3 to express the same color.
However, when incompatible machines are displayed, 20% red is still used, so the color will fade. Display P3 is mainly expanding in the red/green direction, so red and green are most affected. Fortunately, WeChat and Weibo can automatically change the color gamut of shared photos a few days before publishing, but most of the photo editing software and image sharing apps still have to wait for adaptation.
White balance/metering/contrast/tolerance contrast
Click the picture to view the large picture
Outdoor scene 1
Outdoor Scene 2
Indoor scene 1
Indoor scene 2
Indoor scene 3
Weak light scene 1
Weak light scene 2
If you check the proof directly on the 9.7-inch iPad Pro and iPhone 7, you will find that the new iPhone still has the problem of insufficient exposure in low light, but it is slightly better than the previous generation, and the white balance slightly drifts to yellow green (6500K color temperature standard is forced under Display P3?), The red and green levels have been improved to a certain extent, but it is difficult to find out if the daily scenes are not compared.
Considering that Apple's Display P3 standard is still a long way from popularization, the main existing and viewing mode of the new iPhone samples is still the version after being converted to the sRGB color gamut, so the samples of the two new iPhones are converted to the common sRGB color gamut with Photoshop CC and then compared with other phones. The performance of the two new iPhones in terms of white balance, light measurement, saturation, etc. are the same. The light measurement is closer to the naked eye than the previous generation.
The basic white spot of white balance moves slightly from the previous yellow green to light red, and white is more red in the pure white part, which makes the color of the proof more pleasing to the eye. The change of tolerance/contrast/saturation is mainly due to the change of light measurement: the iPhone HDR cannot be completely turned off. What we see is the comprehensive effect of sensor+HDR algorithm, because the light measurement is improved. This time, the sky in the highlight part of the iPhone 7/7 Plus is difficult to have the same details as the previous generation, but Higher metering can better show the dark details.
However, the tolerance of CMOS and HDR strength are fixed, and the metering brightening will also run up together with the dark and bright parts, resulting in overexposure of highlights, which will affect the contrast and saturation. At first glance, the contrast of the image is not as high as that of the previous generation. Many fans said that Android phones have no sense of hierarchy and low contrast/saturation when taking photos. As a result, the iPhone has also encountered the same embarrassment after improving its light metering. However, the writer who likes realism still supports this change.
Discrimination/noise control/"texture" comparison
Click the picture to view the large picture
In the sample comparison, the 28mm wide angle of the iPhone 7/7 Plus can accommodate more objects than the original, but the same object will be smaller, which directly results in a slightly weaker ultimate discrimination than the iPhone 6s/6s Plus, but the amplitude is very small.
Sunlight Scene 1 Zoom In
Sunlight Scene 2 Zoom In
Sunlight Scene 3 Zoom In
Enlarge indoor scene 1
Enlarge indoor scene 2
Enlarge indoor scene 3
Indoor Scene 4 Enlarged
Indoor Scene 5 Enlarged
Enlarge weak light scene 1
Zoom in above the center of weak light scene 2
Enlarge weak light scene 3
Enlarge weak light scene 4
Weak light scene 5 central amplification
Enlarge the center right side of weak light scene 5
The most obvious improvement of iPhone 7/7 Plus is the reduction of weak light noise. Unlike the algorithm smearing of Android camp, Apple relies on crazy ISO suppression. The larger aperture makes the iPhone 7/7 Plus go farther and farther on this road... In the darkest test scenario, the iPhone 6s and most Android devices will reach ISO 2000, and the iPhone 7/7 Plus can also maintain ISO 320. Other weak light scenarios are almost below ISO 150, which shows that it is quite ferocious.
Although the discrimination between daytime and light scenes is lower than that of the old iPhone, the iPhone 7/7 Plus starts to reverse in the low light scene, and the weaker the light is, the more obvious the gap is. The ultra-low ISO brings few noise points, and the picture purity/saturation and level of detail remain very complete. In addition to higher exposure, the dark details that could not be shown before have also come out.
summary
Review the three questions at the beginning:
The newly introduced Display P3 color gamut standard will indeed enrich the red and green layers, but the probability of large red and green areas in daily use is not high, and the difference can only be found by direct comparison;
Compared with the previous generation, the metering and white balance of the iPhone 7/7 Plus are closer to the naked eye The resulting decrease in image tolerance/contrast/saturation and The warmer white balance is not very flattering, but it really records the actual picture more realistically. On the whole, the iPhone 7/7 Plus mainly improves the authenticity of low light performance and light metering/white balance, and the rest are not different;
There is no obvious difference between the main camera of iPhone 7/7 Plus, and even 7 Plus may lose a little to iPhone 7 in some scenarios due to individual differences and test errors. They will be the same in daily use. Although this reduces the superiority of large iPhone users, it is absolutely good news for small iPhone users.
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