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CSC/FAR 020, Computer Graphics, October 2, 2013

CSC/FAR 020, Computer Graphics, October 2, 2013. Dr. Dale E. Parson http://faculty.kutztown.edu/parson Outline for week 5. Adjustment Layers. Additional layers used strictly for adjustments. Retrieve MoreLayers.zip from Parsons/Outbox. Open ScrabbleMusic30Sept2009.psd.

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CSC/FAR 020, Computer Graphics, October 2, 2013

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  1. CSC/FAR 020, Computer Graphics, October 2, 2013 Dr. Dale E. Parson http://faculty.kutztown.edu/parson Outline for week 5

  2. Adjustment Layers • Additional layers used strictly for adjustments. • Retrieve MoreLayers.zip from Parsons/Outbox. • Open ScrabbleMusic30Sept2009.psd. • Layer -> Duplicate Layer, hide Background. • Layer -> New Adjustment Layer • Dialog allows one type of edit per adjustment layer • Color Curves is one example we have already used. • Double click layer mask icon for adjustments dialog. • Adjustments dialog left arrow to change command.

  3. Masking Adjustment Layers • Shift D and X alternate background / foreground colors. • You must fill with black to create a black mask that shields in the layer mask. Using a color curve adjustment layer . . . • Set foreground to black, Select All in layer mask, Edit -> Fill with Black, Select with rectangular marquee, Edit -> Fill with white and try color curve. • If you create the adjustment layer with a selection in place, it supplies the layer mask.

  4. Adjustment Layer Types • You can lower opacity and fill for these. • Click the adjustment icon to get it parameters. • You can alter these with Blending Options. • Control-click the Adjustment Layer. • You can stack these adjustment layers. • Solid Color, Gradient, Pattern, Brightness / Contrast, Levels, Curves, Exposure, Vibrance, Hue / Saturation, etc. See the menu!

  5. Compose with Adjustment Layers • Use Thresholds to Select levels of interest. • Select these levels. • Stack a Posterize Adjustment layer with the selection in place to mask posterization. • Or stack Curves or another layer. • Drag Threshold Adjustment layer to Trash when you no longer need it.

  6. New Layer Options • Layer -> New Layer -> Overlay, Fill with Neutral Color, 50% gray, Opacity 50% • Using Black or White Foreground / Background, use Brush with selected diameter and shape and paint Burns (darken) and Dodges (lightens) on this layer. • Dodge and Burn Tools work similarly on the actual image layers.

  7. Color Selections Include . . . • Color Picker. • Eye Dropper and swap Foreground / Background. • Swatch Palette. • Blending modes on layers and tools affects how foreground / background colors are used.

  8. Fill Layers • Like adjustments layers but with a solid Color, Gradient or Pattern. • Pattern layers include right-selectable libraries to expand the Pattern Palette. • Crop and save ScrabbleBoard as ScrabbleBoardPattern. Place in a fill layer.

  9. Brushing and Erasing • Overview of Brush Options. • Bring up a Background Layer copy and a Layer Mask on ScrabbleBoard. • Layer mask for Eraser • Underlying Layer for Background Eraser • Magic Eraser is like Magic Wand + Cut. • Note different effects of Brush on a Layer versus a Layer Mask.

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