About the channel PS, what is the PS channel

In this way, the channel cutout is divided into 3 channels: red, blue, and green.

The first thing to do is to choose a channel with a large contrast between the hair and the background, and adjust the contrast between light and dark with the same levels and curves as you did.

However, according to the difference of each picture, the brightness and darkness of each part of ** are also different, so ** different parts should be adjusted separately.

The channel cutout can be quickly cut out for the relatively simple ** (the overall sense is better), which is very convenient, but it is not easy to get the cumbersome (more hair).

It is recommended to use a filter cutout, which is a bit more cumbersome but works well.

The above is my humble opinion, if you can refer to it, it mainly depends on LZ's hobbies.

Cutout to cut out the hair, and the color is black, you can do it without channels. I'll tell you a better way to use it: first copy the two layers you want to cut, which are the background copy and the background copy 2, put the background you want to exchange for in the upper layer of the background layer**, operate in the background copy of this layer, extract under the filter menu, brush out the hair part with a brush in the extract box, you can do it at any point, don't be afraid to go beyond the edge, and then force the background color to be black, and then OK.

To be more detailed, you'll have to fill all the parts except the hair with black 000

This way, the darker parts of the background will not be deducted.

Among these three concepts, the concept of passage is the most difficult to understand, and the part explaining the passage in most textbooks is very obscure, so that the reader feels that the second monk is confused after reading it, and I myself know its suffering. Therefore, here I will try to use a more popular vernacular to explain the concept of channel.

First of all, the most fundamental difference between a channel layer and an image layer is that the properties of each pixel point of the layer are represented by the numerical values of the three primary colors of red, green and blue, while the pixel color in the channel layer is composed of the luminance values of a set of primary colors. Let's talk about it in layman's terms:

There is only one color in the channel with different brightness, which is a grayscale image. A channel can actually be understood as a mapping of the selection area.

Originally used to store selections and other information in an image file, the familiar transparent GIF image actually contains a channel that tells the application (browser) which parts to be transparent and which parts to display.

Having said all that, what exactly can the channel do? For example, you've painstakingly sketched out some very irregular areas of selection from an image that are about to disappear when you save them. At this point, we can use channels to store the selection as a separate channel layer; When you need a choice, you can easily call it in from the channel.

This feature is fully used in the ** coloring example of special effects. Absolutely

You can save your selections as different layers, but that's far less convenient than a channel; Moreover, since the image layer is 24-bit and the channel layer is 8-bit, saving as a channel will greatly save space; The most important thing is that a multi-layered image can only be saved in Photoshop's proprietary format, while many standard image formats such as TIF and TGA can contain channel information, which greatly facilitates information sharing between different applications.

In addition, another main function of the channel is to be used for computational synthesis of the same image layer, so as to generate many incredible special effects, this function is mainly used in the production of special effect text. In addition, there are many more functions of channels, which will not be listed here, and will be explained in the example operation.

All in all, the concept of channel is broad and profound, and it is impossible to say it thoroughly in one or two sentences, and it needs to be carefully experienced in actual operation.

In Photoshop, the channels are not the same in different image modes. The pixel color in a channel layer is made up of the luminance values of a set of primary colors, and the channel can actually be understood as a mapping of the selection area.

The color mode of the image determines the number of color channels created for the image:

1.Bitmap mode has only one channel, and there are two levels in the channel, black and white.

2.Grayscale images have a channel that represents 256 shades from black to white.

The image in the mode has 4 channels, 1 composite channel (RGB channel) and 3 channels representing red, green, and blue.

The image of the mode consists of 5 channels: a composite channel (CMYK channel) and 4 channels representing cyan, magenta, yellow, and black.

The image of the mode has 4 channels: 1 composite channel (lab channel), 1 luminosity component channel, and 2 chroma component channels.

The main functions of the channel:

1.Stores the color data of an image.

2.Save and create selections.

3.Cutouts.

The color mode of the image determines the number of color channels created for the image: 1.Bitmap mode has only one channel, and there are 2 levels in the channel, black and white

The image in grayscale mode has one channel that represents 256 levels from black to white The image in gray mode has 4 channels, 1 composite channel (RGB channel), and 3 channels representing red, green, and blue. The image of the mode consists of 5 channels: a composite channel (CMYK channel), 4 channels representing cyan, magenta, yellow, and black The image of the mode has 4 channels:

1 Composite Channel (Lab Channel), 1 Luminance Component Channel, Two Chroma Component Channels Main Functions of the Channel: 1Storing the color data of an image 2

Save and create selections 3Cutouts.