How to set the color mode of SLR camera

1. Color temperature and white balance

Color temperature: a unit of measurement indicating the color components contained in light. Theoretically, the color temperature refers to the color of an absolute blackbody after it is heated from absolute zero (-273℃). After being heated, the blackbody gradually turns from south black to red, yellow and white, and finally emits blue light. When heated to a certain temperature, the spectral component of the light emitted by a black body is called the color temperature at this temperature, and the unit of measurement is "K" (Kelvin).

color temperature diagram

In our daily life, the color temperature of sunlight is constantly changing. It can be said that no two places will have the same color temperature. Different regions, seasons, ground environment, weather, morning and evening will all affect the color temperature. There are also a large number of artificial light sources, and the color temperature is not the same.

color temperature in the environment

The color temperature inside the machine is higher than the color temperature in the field, and the color tone of the picture is red; The in-machine color temperature is lower than the on-site color temperature, and the picture tone is blue; The built-in color temperature is equal to the on-site color temperature, and the picture tone is normal. White balance has two most commonly used basic principles in photography. One is to accurately adjust the color temperature so that the color of the photo can be restored accurately.

white balance is a process in which the internal color temperature and the ambient color temperature compensate each other.

white balance: white balance is a calculation method of digital image color processing by restoring the color of a white subject (producing a pure white color effect), and then achieving accurate color restoration of other objects.

white balance is to adjust the color circuit inside the camera under different color temperatures, so that the color cast of the captured image can be eliminated, which is closer to the visual habits of human eyes.

white balance correction:

this adjustment has the same effect as using color temperature conversion filter or color temperature compensation filter.

white balance drift: when the light environment is complex and the color deviation of photos cannot be corrected by using automatic white balance or preset white balance, some cameras also provide the option of manually adjusting the color temperature. Using this mode, you can adjust the tone of the photo more directly through the color temperature value.

2. photo style

1. standard

images are bright, clear and lively.

2. Portrait

is used to better represent skin color, and the image is slightly clear and bright. Skin can be adjusted by tone.

3. Scenery

is used to shoot bright blue and green and very clear and lively images.

4. Neutral

is used to shoot natural colors and soft images. Do not use sharpness.

5. reliable setting

if the subject is photographed at a color temperature of 52k, the camera adjusts the chromaticity according to the color of the subject. Do not use sharpness.

6. Monochrome

is suitable for black-and-white images (images with other tones can also be adjusted)

III. Parameter setting

Sharpness

Contrast

Color saturation

Tone

For monochrome mode, filter effect and tone effect can be set in addition to sharpness and contrast

Filter effect:

N: None. White clouds appear clearer

Or: the orange blue sky appears a little darker, and the sunset appears more brilliant

R: the red blue sky appears quite dark, and the fallen leaves appear brighter

G: the green skin color and lips are better, and the leaves appear bright

Tone effect:

After the tone effect, the black-and-white image taken is first processed with the tone effect. This can make the image more vivid.

iv. Color Space

the word "color space" originated from the western "color space" and is also called "color gamut". Color gamut refers to the range of colors that can be expressed by a certain color expression mode. In chromatics, people have established a variety of color models. One-dimensional, two-dimensional, three-dimensional or even four-dimensional space coordinates are used to represent a certain color, and the color range that can be defined by this coordinate system is color space. The color spaces we often use mainly include RGB, CMYK, Lab and so on.

two commonly used color spaces in SLR cameras: srgb Adobe RGB

comparison of srgb and adobe RGB ranges

comparison of other color space ranges and general use.