Photography has always been the weakness of many domestic brands. With the crazy upgrade of CMOS and ISP hardware, many domestic mobile phones have taken photos much better than we thought. image Some domestic ROMs such as MIUI and EMUI , they even put them in the camera app Sharpness, contrast, saturation And other adjustment items.

The "discrimination, contrast and color" that many users care about can be fine tuned here. If properly adjusted, it can also make the camera of the mobile phone play more in line with your own taste than the original adjustment, or even better than the original adjustment. But what effect will different settings have? How can it be better? Now let's explore:

Setting method

PS: The test machine in this paper is the high configuration version of Hongmi Note3 All Netcom. When adjusting a mode, other adjustable items are set at the standard gear.

The above is the MIUI camera interface we usually see. Sliding left and right is the filter and beauty, night view, fish eye and other modes.

The gear switches of contrast, saturation and sharpness are hidden at the bottom of the setting menu, and each has 7 gears.

Effect comparison

7-level saturation effect, with strong light at the top and weak light at the bottom (click the picture to view the larger picture)

Saturation affects the intensity of color. The lowest level is basically black and white mode. The highest level seems to have "algorithm purple edge", the color is unusually rich and unreal, and the details of color hierarchy are seriously lost. Lower and higher end availability is also very low. “ High, low and standard gears have higher availability.

However, many middle and low-end CMOS will have the problem of saturation reduction under weak light. For the Red Rice Note full network version tester, the weak light scene must be adjusted to "high or higher" to compensate for the "fading" of the sensor.

7-level contrast effect, with strong light at the top and weak light at the bottom (click the picture to view the larger picture)

Contrast is the ratio of the brightest and darkest parts. Because CMOS can accommodate both light and dark scenes （ Tolerance ）It is fixed. After increasing the contrast, the light and dark details will reach their respective extreme values and become black or 100%. Therefore, the lower the contrast is adjusted, the more light and dark details can be accommodated at the same time. Dark places are less likely to "die in darkness", and bright places are less likely to be overexposed.

• The advantage of low contrast mode is that the picture is more tolerant and can accommodate more details.

• The price is the picture There will be seed It's covered with a layer of ash, not transparent. In addition, low contrast will make it more difficult to smear the noise, resulting in moving noise in weak light.

Level 7 sharpness effect, with strong light at the top and weak light at the bottom (click the picture to view the large picture)

Sharpness reflects the edge sharpness of image content, which is the most important photography project of many Maoists.

• Low sharpness mode has its own smear effect, which is not recommended at all. and The higher the gear is, the higher the sharpening radius and force are The thumbnail can feel its extremely high "clarity". Manufacturers such as Samsung, LG, Moto, etc. often deliberately increase their sharpness.

• high The price of sharpness is, Some picture details will be erased due to the increase of sharpening radius, and large noise particles will appear in large areas of solid color. In addition, Unnatural white edges will appear on the edges of objects with large contrast, such as black and white words.

summary

in the light of Saturation Contrast and sharpness These three adjustment items, Because a stronger noise smearing algorithm is required under weak light, the conclusion is divided into two cases: strong light and weak light.

Under strong light, the saturation is set to standard or high according to the taste; The lower the contrast, the richer the details, stay In sunny days/beaches and other scenes with large light difference, even if the contrast is adjusted to the lowest, it is OK; The sharpness can be adjusted to a higher or even the highest level according to different models.

Sharpness/contrast/saturation in low light, and the effect contrast of "lower, lower, higher, higher"

The interference of noise reduction and smearing algorithm in weak light will make the situation much more complicated, which should be determined according to the respective model. For Hongmi Note3 All Netcom, it is better to set it all to low in low light. The full high gear will lead to the loss of some dark details, but these are obviously not the optimal solutions.

Weak light saturation is suitable for high gear. It is better to set the contrast at low and standard. Sharpness has little effect (noise is full on the screen, and the sharpening algorithm is unable to improve). However, for the sake of image purity, low or even lower gear is more suitable for weak light scenes. Therefore, for Red rice Note3 All Netcom, it would be better to adjust it to high saturation, low contrast and low sharpness in low light scenes.

In addition, some manufacturers have actually made fine adjustment before delivery. For example, the default contrast and saturation of Huawei G9 are high, and dark details are often lost. If you feel that the original tuning is a bit too harsh, you can also manually lower one or two gears.