Don't hesitate to comment below if you have any questions or additional phrases
CSC/
FAR 020,
Computer Graphics, September 21-23, 2009 Dr.
Dale E. Parson
http://faculty.kutztown.edu/parson Outline for week
3-4
,
Remote drives in the lab If you do not find the
Student Projects or Faculty-Folders folders on the lab machines:
Finder -> Go (menu) ->
Connect to Server
Enter: instructionaltech.kutztown.edu
Supply K.U. login and password. Student Projects or Faculty-Folders will appears in the Finder. ,
Changing Canvas Sizeand Crop
Tool Retrieve CropLayerSelect from
Parsons -> Outbox and unzip on desktop. Browse using the
Bridge.
Open NIME2009GeOcarina
.jpg in
Photoshop.
Image -> Canvas Size to shrink or grow the canvas.
Undo changes, try again.
Use Crop
Marquee to crop the image. Make sure
Options Width,
Height and
Resolution are
Clear.
Shield option highlights area to crop. Crop area can be resized, moved, or rotated. Use Enter or Control-click to accept,
Escape to cancel. Width and Height can set aspect ratio. ,Using Crop Tool to
Copy Image Size
Save a smaller version of NIME2009GeOcarina.jpg as WxH.psd (5X7.psd) in inches.
With WxH.psd still open after saving, open Nime2009Trombon1.jpg from the Bridge. In Crop Tool click Clear and
Front Image from within 5X7.psd. Now crop Nime2009Trombon1.jpg, rotating marquee to get alignment. Get both images to the same size. Set background to black and enlarge the 5X7.psd to a size that can hold both images by stretching crop region.
Select -> All on the trombonist, paste and position into a layer. ,
Regular Marquee Cropping Select and area with the Marquee selector.
Optionally constrain size of Ratio.
Image -> Crop to crop from here. Image ->
Trim trims away fixed color margins. Ruler Tool (grouped with
Eyedropper) allows you to orient along some alignment feature. Image -> Image
Rotation -> Arbitrary rotates to this line.
,
Layers Merge the pair of layers in WxH.psd via the Layers command.
Sweep a marquee.
Create a new
Layer via Copy from Layer menu. Undo, try the same with Layer via Cut.
Convert background to a layer and back. Layer groups are like Folders. They are useful for maintaining layers. ,
Basic Selection Open NVLakeFireFigure.jpg from Bridge.
Select -> All selects all pixels in layer.
Note other selection options.
Rectangular and Elliptical Selection tools: Options on option bar, go into Refine
Edge and explore.
Lasso Tools allows rough selection Note new/add/subtract/intersect options.
Shift-sweep also adds to selection. Alt/Option-sweep subtracts from selection. ,Polygonal and
Magnetic Lasso
Draw straight-edge polygons around area,
Double-click anywhere or single-click start
point to end.
Delete key cancels last vertex (last point clicked). Alt/option sweeps reverts to free-form lasso. Magnetic lasso assists using edge detection.
Delete and alt/option also work here.
Sometimes it closes its own areas based on boundaries. Use zoom (command + and command -) with this. ,Selections
Based on
Color Go to original NVLakeFireFigure.jpg .
Clear selections.
Use Quick-Selection tool to select the sky. Auto-enhance to improve edge detection.
Change brush area to sample larger range of pixels. Add sky and subtract clouds, etc. Use magnetic lasso + and – for fine tuning.
Magic wand selects pixels using nearby colors. Lower tolerance is more selective.
Control-click
Similar to add non-adjacent regions. ,
Silhouette Create new image with black background.
Select All -> copy and paste a new layer. Use color-based tools to Delete portions of image. ,Select -> Color
Range Selects based on pixel values with a range of fuzziness. NVLakeFireFigure.jpg:
Select the sky within some range of color values.
Vary Color Range and “Refine Edge” option parameters. Select ->
Inverse, then Marquee subtraction and
Magic Wand subtraction to get the rock
Figure only.
Edit -> Copy, Layer -> New from Copy.
Save As Dali.psd.
,
Get rid of the pesky text. Edit the new
Laye
- published: 01 Jun 2016
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