Besides a Lab inversion, and L-channel inversion, and the A-channel inversion, inverting the B channel is an important move. Note that you can also invert the combined A-B channels.
- [Instructor] You can just as easily apply an inversion … to the B channel in LAB as to the A channel. … For example, take this door knocker guarding the entrance … to a doctor's consulting room … that I saw whilst strolling in the streets of Valletta … in the Island of Malta. … It's a kind of scary guardian in polished brass … but think of how much more exciting it might be … with a color makeover. … If I put this into LAB … and then highlight the B channel, … make sure all channels are visible, … and then I go Image, … Adjustment, … Invert, … and I now have a sort of metallic blue door handle up there. … So looking at another example, … it's also possible to invert both A and B channels, … both color channels in LAB … and that should give you more or less … exactly the opposite colors … of what's there in the first place. … This is our old friend the foxglove … and I'm putting him back into LAB Color. … And this time I'm going to select both the A and B channels. … Note that to select the second color channel, …
- Converting images to Lab Color space
- Applying Curves to Lab channels
- Selective sharpening
- Inverting channels
- Making per-channel equalizations
- Using the Lab action
- Combining Lab Color with blending modes
- Making patterns with Lab images
Skill Level Advanced
Photoshop: Backgrounds and Textureswith Harold Davis2h 18m Intermediate
Enhancing Landscape Photos with Photoshop and Lightroomwith Ben Long1h 30m Intermediate
Enhancing Night and Low-Light Photos with Photoshopwith Seán Duggan2h 12m Intermediate
1. Fine-Tuning an Image with LAB and Curves
2. Using the Inversion Adjustment
Inverting the A channel3m 25s
3. Working with Equalizations
4. A Palette of Lab Possibilities
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