ps channel refers to the mapping of the selected area, which can be divided into: 1. Alpha channel; 2. Color channel; 3. Mixed channel; 4. Spot color channel; 5. Vector channel.
The operating environment of this article: Windows 7 system, Dell G3 computer, Adobe Photoshop CS6 version.
In photoshop, the channels are different in different image modes. The pixel color in the channel layer is composed of a set of brightness values of the primary colors. The channel can actually be understood as a mapping of the selected area.
Channel classification:
1. Alpha channel
Alpha channel is a term in computer graphics, referring to Special passage. Sometimes it refers specifically to transparent information, but usually it means the "achromatic" channel. Alpha channel is a channel specially designed to save the selected area. When generating an image file, it is not necessary to generate Alpha channel
2 and color channel
A picture is Color channels are automatically created after creation or opening. When you edit an image in Photoshop, you are actually editing the color channels. These channels decompose the image into one or more color components. The color mode of the image determines the number of color channels created for the image:
1). The bitmap mode has only one channel, with black and 2 color levels of white.
2) The image in grayscale mode has one channel, which represents the change of 256 color levels from black to white.
3), RGB mode images have 4 channels, 1 composite channel (RGB channel), and 3 channels representing red, green, and blue respectively.
4), CMYK mode image consists of 5 channels: a composite channel (CMYK channel), 4 channels representing cyan, magenta, yellow and black respectively.
5) The image in LAB mode has 4 channels: 1 composite channel (LAB channel), 1 brightness component channel, and two chroma component channels.
[Video tutorial recommendation: PS tutorial]
3. Mixing channel
The mixing channel is derived from the concept of mask Here comes a simplified application for controlling the overlay relationship between two images. The blend channel contains no information and is really just a shortcut to preview and edit all color channels at the same time. It is often used to return the Channels panel to its default state after individually editing one or more color channels.
4. Spot color channel
The spot color channel is a special color channel. It can use cyan, magenta (some people call it magenta), yellow, Draw the image with a color other than black.
5. Vector channel
In order to reduce the amount of data, people analyze the digital image drawn point by point again, and use complex calculation methods to convert the points on it , line, surface and color information are converted into simple mathematical formulas. This formulated graphics is called "vector graphics", and the formulated channels are called "vector channels".
The main functions of the channel:
The main functions of the channel:
1. Storage and View precise image color information to help adjust image color.
2. Store and create precise selections. Use masking and selection or filter functions to create white areas of hair that represent parts of the selected area.
3. Easy to cut out pictures
The above is the detailed content of what is ps channel. For more information, please follow other related articles on the PHP Chinese website!

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