Most of us usually use RGB mode when using Photoshop. In fact, I think LAB mode is also very useful. Let’s talk about some of the ways I used LAB mode to adjust colors in the past. For your reference.
Everyone knows that the LAB mode has three channels: one is the brightness channel, and the other two are the A and B channels. The "brightness channel" is the brightness channel, and the color will not change if you adjust it. A and B are color channels whose adjustment will cause color changes. The color change of the A channel is simply green → gray → red, and the B channel is yellow → gray → blue.
Method one
Let’s take a look at the effect we just made.
Original picture:
Effect:
Here’s how to do it:
1. Open the picture, copy, and auto-level.
2. Execute "Image-LAB mode"
3. Click the channel, select all channel a, copy, click channel b, and paste.
4. Finally switch back to RGB mode (with a simple process chart attached)
Method two
In the same operation, we select channel b and paste it to channel a!
Let’s take a look at the effect!
Then adjust it appropriately, opacity or change the mode, the effect will be different.
Simple step-by-step diagram
At this point some may say that the character’s skin color is ugly. This is simple, just add a mask, erase it, and do some simple processing.
Method three
Open image copy, auto-level, execute image LAB mode
Here we calculate as shown in the figure
Then click on the channel and find that there is an extra channel. Okay, let's select all the extra channels, copy and paste them into channel A.
Then go back to the layer and adjust the opacity or mode.
As shown in the picture
The last thing is crucial.
Here you can use hue and saturation to adjust any color you want.
