Join Tim Grey for an in-depth discussion in this video Creating a mask based on luminosity, part of Photoshop: Creating Composites (2012).
For some images, the thing which separates the object you want to isolate …from the rest of the photo is luminance or overall brightness values. …For this photo for example, if I wanted to separate the egret from its background,. …It looks like brightness values would be a good way to isolate the subject. …The egret is brighter than its background. …And so, let's take the look at a technique where we can use the luminance …values in a photo to create a Layer Mask. I'm going to start off by creating a copy of …my Background Image Layer. I'll go ahead and drag the thumbnail for …my Background Image Layer down to the Create New Layer button, the blank sheet …of paper icon at the bottom of the Layers panel.…
When I release the mouse, a background copy layer will be created. …I'm then going to set the opacity for this layer down to 50%. …Now, at this point, that will accomplish absolutely nothing, because we're simply …seeing through this layer with it being partially transparent. …But then, seeing below the exact the same thing. …
- Composite concepts
- Creating automatic composites
- Image compositing
- Refining layer masks
- Matching images
- Adding effects to composites
- Using layer groups
Skill Level Intermediate
Photoshop Masking and Compositing: Fundamentalswith Deke McClelland11h 35m Intermediate
Photoshop for Photographers: Compositingwith Chris Orwig4h 45m Intermediate
1. Composite Concepts
2. Automatic Composites
3. Image Compositing
4. Refining Layer Masks
5. Matching Images
6. Adding Effects to Composites
7. Using Layer Groups
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