1. More Layers, Moving, Copying
CSC020, Computer Graphics
More Layers, Moving, Copying 1

2. More on hiding Camera Text (Clone Stamp Tool)
Open my CropLayersSelect folder from last time.
Use Magic Wand to select the text.
NVLakeFireRoadOpens.JPG
In “New Selection mode” move the selection to adjacent pixels (remember to press “M” to move the selection)
Copy adjacent pixels, use magic wand to reselect the text, then paste.
Merge the layers.
Use Clone Stamp Tool to fix up the final image (next slide!)
Make sure you’re on the right layer!!!! 2

3. Clone Stamp Tool Make sure you are on the right layer!!! Select a size
Hold the Alt key an click on a spot from which to copy pixels
Release the Alt key
Click on an area to repair
Notice the + sign! – pixels are copied from there!
+ sign follows the cursor around, copying from a different spot each time a repair is made

4. Cut / Copy Moving a Selection
Select, then use Move tool to destructively move the pixels.
Pixels are moved from the selected area
Select, then use Alt/Option Move tool to copy the pixels.
Pixels are copied from the selected area
Original pixels are unaffected 4

5. Alpha Channels and Selection
Use Channels palette to:
Save selection as channel.
Load channel as selection.
Select alpha channel first
Load it
Turn alpha channel back off
Alpha channels are saved as part of Photoshop file.
After loading, go back to the Layers tab to use the selection
Select the layer to edit in the Layers tab

6. Copying pixels between images
The source pixels are matched to the resolution of the receiving document (use resolution.zip).
Copy image areas between #403 and #402.
Image becomes smaller when moved to higher resolution, larger when moved to smaller resolution.
Use up or down sampling before copy / paste between images (using image -> Image Size).
Or, change size of selection with...
Edit -> Free Transform
Edit -> Transform -> Scale
(hold shift to maintain aspect ratio) 6

7. Adding a Layer Mask Open your dali.psd (from last time)
After getting a fairly dark, high contrast monochrome face layer, go to Layers palette and add a Layer Mask.
Select Gradient Tool (with Paintbucket)
Linear, black / white tool Options.
Drawing a line using the gradient tool applies that gradient within the Layer Mask. 7

8. Blending Seams Set foreground to white, background black.
Get a fresh Layer Mask for the face.
Select the Brush Tools and set its options.
With the Layer Mask selected, brush the seams.
Background color (black) to hide
Foreground color (white) to reveal
A lower Flow value uses a lighter touch.
Deleting the Layer Mask removes it effects. 8

9. Merging Photoshop Images
Use Bridge to browse PhotoMerge (compress PhotoMerge.zip)
Select left, mid and right JPEG images.
Tools -> Photoshop -> Photomerge.
Accept defaults.
The PSD file in this Folder is the output of Photomerge. 9

10. Pixels outside the Canvas
Edit an image to paste some pixels beyond the edge of the canvas
Image -> Reveal All expands canvas to hidden pixels.
Select -> All, Image Crop to remove outside- canvas pixels.
Merging layers retains pixels outside the canvas area.
Merging a layer with the background deletes pixels outside the canvas. 10

11. Pattern Tool Make a selection, then Edit -> Define Pattern.
Cmd-D to deselect
Pattern Stamp (with Clone Stamp) lets you paint one image onto another.
Uncheck “Impressionist” and check “Aligned” to get a repetitive, wallpaper effect. 11

12. Compositional Aesthetics in Image Editing (borrowed from Gestalt Psychology)
Proximity
We group image elements that are close together.
Similarity
We group image elements that share features.
Common Fate
We group image elements that change together.
Good Continuation
Group elements that vary continuously (no boundaries). 12

13. Compositional Aesthetics in Image Editing (continued)
Closure
We fill in lost fragments to complete a group.
Figure-Ground Relationship
(Foreground / Background)
Figure is differentiated from the Ground.
Past experience
Symbolic imagery, representational objects, text..
Applying multiple principles
Compose an image using these abstractions. 13