If your goal is to have a high-qualitythe right image, then you need to deal with such a thing as "white balance". If desired, you can configure it in the camera just before shooting, or you can afterwards, using special programs for image processing.
So, there is the concept of color temperaturelight, which should be understood, before proceeding to determine what it is - the white balance. Everyone knows that light coming from different sources has a different color. In physics, this fact is explained as follows: if any physical body of black color is heated, it will begin to emit electromagnetic waves that will be distributed in the infrared range. When the temperature rises, the waves will go into the range of visible light. For example, a black body, heated to 1800-2000 Kelvin, will emit a light red-orange color.
The radiation spectrum begins to shift in morecold direction, if the temperature rises, changing from yellow to green, blue and so on, moving to ultraviolet and radio waves. For the convenience of terminology, the shade of light is usually characterized by the color temperature, which is indicated in the Kelvin. White balance in this case is a very important indicator. The human eye perceives a white color, regardless of what kind of lighting is around, but it can also fail. If you quickly enter the room from a street where it is very sunny, the first few seconds everything will be seen with a yellow tint, until the vision adapts to the new conditions. The visual analyzer works in the human brain, and in modern cameras an electric one is used, which is called "automatic white balance". It is very good, if the camera independently sets the value of this indicator or allows you to use certain presets so that its owner can do it manually.
Usually the white balance in a photograph taken by modern cameras can be adjusted by means of the following presets:
- Auto - automatic mode, excellenttriggered during daylight shooting, when the sun is the main source of light. It is also useful when there is a constant change in lighting, which makes it difficult to determine the light temperature.
- Daylight is a day mode, with the camera itself adding warm colors to the frame.
- Cloud - cloudiness, with the addition of warm tones.
- Shade - the shadow. Here the previous setting is used, but warmer colors are added even more.
It should be said that this is not all possiblesettings, but the main ones. White balance can be adjusted manually, but this should be considered in sufficient detail in a separate article. To quickly cope with the configuration tasks, you can take a picture of a sheet of white paper, and then rummage through the camera settings to get the best result. White balance in Photoshop is easy to set up, for this there is an instruction in the program itself. Such an option is convenient in the event that the picture can not be resized, but it is necessary to make a high-quality image.
