CS 547 Digital Imaging Lecture 3 Working with Selections Layer Basics Free Transform & Basic Type Selection Tools Rectangular Marquee tool Elliptical Marque Tool Shift Select perfect circle Alt Select center elliptical Lasso Tool Polygon Lasso Tool Magnetic Lasso Tool Uses contrast to isolate complex shapes Hit backspace to backup Magic Wand Tool need consistent color Quick Selection Creates a selection based on all layers Selection buttons on option bar Subtract from selection (Alt) Add to selection (Shift) New selection Move Tool Select first then move Intersect with selection (Alt-Shift) Expanding a selection Select > Refine Edge (also on option bar) Select > Modify: Border, Smooth, Expand, Contract, & Feather Select > Transform Selection modifies a selection Select > Grow to include all adjacent pixels falling within the tolerance range (Magic Wand options). Select > Similar to include pixels throughout the image, not just adjacent ones, falling within the tolerance range. Select > Color Range based on sampling a color. 1
Retouching tools Spot Healing Brush tool (Blends) Removes blemishes and imperfections Healing Brush tool (Blends with Sample) Removes wrinkles Alt-Click to select a sample spot Patch Tool (Blends with sample) Removes many imperfections Clone Stamp tool (Replaces with sample) Alt-Click to select a sample spot ] [ - Increase / Decrease brush size 5 Retouching tools Summary Retouching Tool Spot Healing Brush Sample Spot Blends Healing Brush X X Patch X X X Replace Clone Stamp X X Eight General Steps for Retouching 1. Make a copy of the original and work with the copy 2. Check the quality and resolution 3. Crop 4. Repair flaws (rips, dust, or stains) 5. Adjust contrast and tonal range 6. Adjust - Remove color casts 7. Adjust color and tone (highlights, midtones, shadows, and desaturation) 8. Sharpen Note: You should complete these process in order Layers Image are stacked on top of another you see the cumulative effect. You can isolate image areas Apply special effects without affecting other layers Rearrange layers stacking order to create different design effects You can apply a different opacity and style to each layer Ctrl-Shift-N (Create New Layer) Select, Ctrl+J (Create layer from selection)
Advantage & Disadvantage Advantage of layers: Provides ability to isolate effects and images on one layer without affecting other layers Disadvantage of layers: An image containing multiple layers can get very large Image Layers File Size What To Do With Layers Add, delete, duplicate, and move layers Hide and display layers You can use blending modes to change the way layers interact. Change the opacity of a layer Change the order of layers Always LOOK to see if you are on the right layer before you do any of the above Types of Layers Layer Panel Layer Panel Menu Commonly used layers Background layer Image Layer Type Layer Blending Modes Layer Visibility Indicator Layer Name Layer Opacity Selected Layer Locked Layer Layer Thumbnail 6 ALWAYS Name your Layers
Transforming a selection or layer 1. Select the content you want to transform 2. Choose Edit > Free Transform 3. Transform the item by manipulating the transform handles 4. Press [Enter] or to apply the transformation, or press [Esc] to cancel it Layer Panel Link Layers Add a Layer Style Add a Layer Mask Delete Layer Create a New Layer Create New Group 97 Create New Fill or Adjustment Layer ALWAYS Name your Layers Defringing a layer A fringe (background noise) can sometimes occur around the edges of a pasted selection. Choose Layer > Matting > Defringe A fringe appears at the edge of this layer The Defringe command removes the fringe 7 Background Layer Bottom layer Can only have one Cannot change order, blending mode, or its opacity - LIMITED Transparent content has no background layer Always called background you can t rename To convert background into layer Double click background Right click layer > Layer from background To convert a layer into a background Select layer Choose layer >New > Background from layer
Linked layers Liked layers move & transform in unison The Type Tool s options bar Font Size Alignment buttons Create Cancel any warped text current edits Link Layers Layer linked to selected layer Selected Ctrl+Click layer to toggle link Move link to trash to break link Style Anti-aliasing method Note: To reselect Type, double click the type thumbnail on the layers panel Color Formatting palettes Commit any current edits Layer Styles Click the f button on Layers Panel Viewing Effects The Layers panel shows what effects have been applied to Layers 98
Merging Image Layers Merge selected image layers into a single layer to make specific edits permanent Reduces the size of your image files Select Layers RC Merge Layers Layer menu Merge Layers Flattening an Image Merges all visible layers into a single background layer and discards hidden layers Reduces the size of your image files Select Layer RC Flatten Image Layer menu Flatten Image Organizing Layers Grouping Layers A Layer Group contains a collection of individual layers For example, create a layer group to contain all the Type layers in an image Stamp Multiple Layers Creates a new layer containing the merge content & Leaves original layers intact Select Layers Alt+Ctrl+Shift+E When should I Merge or Flatten NEVER, for any class assignments! WHEN ASKED TO MERGE OR FLATTEN IN A HOMEWORK ASSIGNMENT: 1. Stamp Visible Layers (Alt+Ctrl+Shift+E) 2. Group Layers 3. Make group invisible 10