Lab Channels

By Greg Anderson on AppTrack Ninja.

Edit tone and color apart

ab Channels converts your photograph into CIE L*a*b* and lets you work the three channels separately. In RGB, brightness is baked into every channel. Turn down red and the picture gets darker as well as less red — the two cannot be separated. Lab splits them apart. One channel carries all the tone. Two carry all the colour: one running green to magenta, the other blue to yellow. That separation is the point. It lets you change colour without touching brightness, or brightness without shifting a single hue. WHAT YOU CAN DO • View any channel on its own as greyscale • Invert, brighten, or add c…

Categories: Photo & Video, Graphics & Design

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