How do you understand channels in Photoshop?

The concept of channels is very unique in Photoshop, and it is a simplified tool derived from the color mode. For example, an RGB primary color map has three default channels: Red, Green, and Blue.

But if it's a CMYK image, there are four default channels: Cyan, Magenta, Yellow, and Black. From this, it can be seen that each channel is actually a separate channel of a certain basic color in an image.

In other words, the channel uses the color value of the image to modify the image, and we can think of the channel as a filter in the camera.

There are two types of channels: the first is used to store the color data of the image, which belongs to the built-in channel, and the second can be used to solidify the selection and mask, and perform the same editing work as the image to complete the operation of blending with the image, creating a new selection, and so on.

Channels are widely used, and they can be used to create selections and perform various operations on selections. You can also think of a channel as an image composed of primary colors, so you can use filters to deform, adjust colors, copy, and paste a single primary color channel. The combination of channels and masks can greatly simplify the repetitive operation of the same selection, using the mask to save the selections created in various forms, and then easily recall them later, and using the channel, you can easily use filters to create various special effect images that cannot be made with the selection tool and the path tool.

Passing by, I found that the upstairs was really good, and the neighbor taught.

1. First of all, the basic function of the channel is in various color modes (RGB, CMYK, Lab......) to display the primary colors separately, which is very useful for print output. You can adjust a single color channel to achieve your desired effect. You can use the Split and Merge Channels command in the Channels command to preview the output effect.

2. Selection function, due to the complex color of the picture in multi-color mode, the use of magic wand and color range, can not be accurately selected, then you can copy a single color channel, in the monochrome mode by adjusting the color level to make the range to be selected obvious, and then through the channel adjusted in the left click of Ctrl, accurately select the selection.

3. Combine filters to make special effects, which are generally available in filter textbooks, and can make three-dimensional characters, special effect materials, etc.

In addition, if you want to convert three or four colors to grayscale mode, you can also go through the channel, first convert ** from RGB or CMYK mode to Lab mode, and then throw away the two channels A and B, then turn to grayscale, and then adjust the color level to achieve satisfactory results. The advantage of this rotation is that the details of the highlights and shadows are clear after the conversion, and the relationship between light and dark in color mode remains unchanged in grayscale.

A little experience, if there is any shortcoming, please add downstairs!

PS is a professional mapping software, so PS has a lot of tools, among them, there are a variety of cutout tools, lasso tools, magic wand tools, mask tools, etc. are often used. But when it comes to portrait cutouts, simple tools can't achieve a satisfactory cutout effect, but you need to use the PS channel. Let's demonstrate the tutorial of how to use the channel and share the cutout skills.

There are professional PS software tutorials, from basic to advanced, which is very suitable for those who want to learn PS by themselves.

Tutorial on the use of the channel of PS software:

1. [Open] PS software, [Open] the original picture, first analyze the problem of the original picture and then make a cutout, and use the channel to cut out the width of the more difficult transparent wedding dress. Ctrl+J duplicates the layer, first uses the Pen Tool to cut out the opaque part, and then Ctrl+Enter converts it to a selection.

2. Add [mask] again, so that the body part can be deducted.

3. Copy the original image layer, adjust to the channel, [copy] the green channel, and then [CRL+L] adjust the level to make the background black.

4. Use the black soft-edged [Brush Tool] to paint the underneath, and then [Ctrl+Click Thumbnail] to bring up the green channel.

5. Go back to the layer panel and add [mask] to the background layer, so that the transparent wedding dress will be cut out.

6. [New] Layer 2, then go back to Layer 1, and use the white [Brush Tool] to paint the junction between the wedding dress and the bottom to make the transition natural.

7. After adding the [Curve] layer adjustment, add [Mask], and [Ctrl+Delete] fill in the background color. Then use the white Brush Tool to select the part that needs to be highlighted.

8. Copy the layer Li Wuliang in the background, and use the [Burn Tool] to paint the background part. This completes the retouching.

The above is the demonstration process of the use of PS channel orange spikes,Although PS channel cutout is very easy to use,But you should know,Not all** is suitable for using channels to cut out,Generally, you have to decide according to the color information of the three channels in the channelR、G、B。