Usually when doing single product evaluation, I have the habit of comparing several machines with cheap hands, which results in some messy "horizontal evaluation samples". This time, the samples were left by the Hongmi 2 camera, so the comparison machines are Xiaomi 2s, Xiaomi 4, Hongmi Note, and Huawei Glory 4X, which is also Xiaolong 410.
If you happen to have one of the machines, or you want to buy one, I hope this article can help you to have a general understanding of the camera level of the machine.
After all, mobile phones are not special cameras, so in the following comparison, more attention is paid to "discrimination, color performance, tolerance, white balance and accuracy of light measurement", while the remaining wide-angle size (picture field of vision), edge degradation control, background virtualization, and macro distance are not required too much. Of course, the main reason is that I am lazy. I didn't finish all the comparison projects
parameter
Hongmi Note: The model of the 13 megapixel sensor is unknown. The lens is provided by Sunny Optics with aperture F2.2. The test machine is MTK MT6592 eight core processor version of MediaTek, and the system is MIUI V5
Xiaomi 2s: Sony IMX135 sensor, 13 million pixels, aperture F2.2. The test machine is 32G telecom version, and the system is MIUI V5
Xiaomi4: Sony IMX214 sensor, 13 million pixels, F1.8 aperture, 6P lens. The test machine is mobile 4G version, and the system is MIUI 6
Glory 4X: sensor from SONY OV, 13 million pixel second generation back lit sensor, F2.0 aperture, lens double-sided antireflection film and anti fingerprint film. The test machine is a full Netcom version.
Daytime proof sheet
The jigsaw sequence is red rice note in the upper left corner, millet 2s in the upper right corner, millet 4 in the lower left corner, and glory 4X in the lower right corner. Click the magnifying glass in the upper right corner of the picture to view the large picture.
The glory 4X metering in the lower right corner is slightly bright, and the red rice note is slightly dark; In terms of white balance, there was some deviation, but the red rice note was relatively calibrated, followed by millet 4, millet 2s was blue (the ground turned blue...), and glory 4X was seriously yellow.
Red leaves plus low angle sunlight require high white balance. The most accurate color restoration in the sample is the red rice note in the upper left corner. Millet 4 is yellow, while Glory 4X is strangely pink. Discrimination: Hongmi note>Glory 4X>Xiaomi 2s>Xiaomi 4.
The center of the building corner is 100% enlarged, millet 2 is yellow, millet 4 is red, and glory 4X is seriously red this time; The biggest problem of red rice note photography is that the noise is obvious. Even though the ISO is only 108, the image can still see many noise points, but the discrimination is not poor and there is a large scale of sharpening, and the image details are the most abundant; The second is Xiaomi 4, but the railings on the buildings have color interference.
The red rice note is darker, so the overall picture is more transparent. In addition to the glory 4X, the white balance of the other three parts has some problems, and the Xiaomi 2s is more blue than the sky. In terms of discrimination, red rice notes are still the best, followed by millet 2s and glory 4x (with a slight purple edge), and rice 4 is smeared into a lump.
Original drawing
Center 100% magnification
Top left corner 100% enlarged
In terms of analytical comparison, the strongest one is the red rice note, which can even see the brackets of several words on the billboard in the middle of the screen, followed by Xiaomi 2s and Xiaomi 4, and Glory 4x, which can barely see the brackets (after taking six consecutive pictures, this one is the most clear, and the machine is unable to focus on the scene?)
Facing the corner of the building, the focus is on the pot of grass. The analytical power and sharpening effect of the red rice note make the grass outline clear and sharp, followed by Xiaomi 4, which has been smeared again by the algorithm, and Xiaomi 2s, which is powerless. The effect of Glory 4X similar to "overall purple edge" is the worst.
100% amplification in the middle
Top left corner edge 100% enlarged
In the close-up sample, the red rice note has a metering deviation, and the picture is rarely slightly bright, causing the picture to be gray. Xiaomi's 2s white balance turns blue again, and the rest of the white balance is not a problem.
On the edge of the upper left corner of the sample, the edge of millet 2s is the least deteriorated, followed by red rice note and glory 4X, while millet 4 is obviously blurred at the most edge.
Original drawing
Center 100% magnification
100% magnification in the center of the other sample
In the large angle landscape photos, the white balance of Mi4 finally drifted to the center, followed by Xiaomi 2s in the upper right corner, and the red rice note and Glory 4S turned yellow. In terms of details, except for the glory 4X, the gap between the other three parts is not obvious.
Weak light proof sheet
In the normal indoor lighting environment, the above pictures are all the proofs with 100% magnification in the center, focusing on "Coca Cola" and the table card in the center. The lowest ISO red rice note has the best discrimination, but it has the most obvious noise, followed by Xiaomi 2s. Xiaomi 4 is still heavily smeared, and the details are polished, but the performance is still better than the glory 4X.
Indoor ultra weak light, the other three parts are between 1/15-1/14s, while Glory 4X sets the safety shutter at 1/17s, with a higher film rate. Because the metering is too dark, the red rice note can press the ISO at 750 and get the best picture details, while the other three parts show the same details;
The Xiaomi 2s and Xiaomi 4 with Sony sensors went to ISO 1586 and 1400. In the ultra weak light, Xiaomi 4's daubing algorithm has finally gained momentum and achieved the best picture purity; Although the ISO of Glory 4X is lower than that of Xiaomi 2s, it has the most serious noise, which is more serious.
HDR
Red rice note
Millet 2s
Millet 4
Glory 4X
Although only one sample of the scene is retained, it can still be found that the HDR effect of Xiaomi 2s is the worst. In addition to color cast, there are also obvious brightness changes at the edge of the building, followed by Xiaomi 4 with color change; The best ones are Red Rice Note and Glory 4 (I also corrected the color deviation of the sky).
summary
The comparison results are relatively "inverted". In addition to the weakest performance of the cheapest Glory 4X is in line with psychological expectations, the two generations of Xiaomi flagship, which used Sony IMX135 and IMX214, lost to the red rice note of the entry machine, and still fell behind on a large area of the power white balance (reminds people of Meizu that the cheaper, the smoother), The performance of Xiaomi 2s and Xiaomi 4, a generation apart, is similar, and the former is slightly superior (the upgrade of sensors was even smeared by the heavy handed algorithm).
According to the previous Xiaomi Note Evaluation It is inferred that the Hongmi Note is the best model for taking pictures even if it is not the best model for Xiaomi Family. This result may make many users holding Xiaomi 4 feel sad, but it will also make users of Xiaomi 2s feel happy. As an old flagship, Xiaomi 2s outperforms Xiaomi 4 in performance in addition to unstable white balance
Note: Both Xiaomi 2s and Hongmi Note are MIUI V5, while Xiaomi 4 is MIUI 6. Some netizens reported that the image quality of Xiaomi 4 will decline after upgrading MIUI 6. However, Xiaomi 4 in the computer evaluation room is a mobile 4G version, and MIUI 6 is pre installed at the factory, which cannot be verified for the time being.
