GrampzillaAndBoppy: Comment: Gimp

Image Creation #

and#

Malipulation #

using#

GIMP#

CSC 101 - Introduction to Computer and Applications Robert Willhoft, 2009

Vignette#

Introduction to Layers

Selection Tools#

Rectangular
Ellipse
Free Select
Fuzzy Select
Select by Color
Scissors
Foreground

Step #1 - Create Background Layer#

Load Faith & Adrienne picture
Create a new layer
- Layer ► New Layer
- Name the new layer Black Vignette
- Select the foreground color button
- You should have 2 layers
- Drag the new layer below the picture

Notes:

You make layers visible or invisible by clicking on the eye
The layer with the white border is the active layer

Step #2 - Create Mask from Selection#

Create a Mask using the Ellipse Selection tool
- Select an area around Adrienne and Faith
- Be sure that you have the Faith & Adrienne.jpg layer selected
- Layer ► Mask ► Add Layer Mask
- Initialize Layout Mask to: Selection
Turn off your selection
- Selection ► None

Step #3 – Blur the Mask#

Adjust
- the Vignette
- Select the mask
  - Blur the border
    - Filters Blur ► Gaussian Blur
      - Make sure Horizontal & Vertical are locked
      - Enter 400
Crop the picture
- Select the picture
- Use the crop tool so it is centered

Vignette#

Finished Image#

Export as:

simpleVignette.jpg

Warning: Once you export an image as a JPEG (jpg) all of the layer information is gone.If you want to save the layers use the Save option, which saves a GIMP XCF image file format (xcf).

However, XCF files are huge, so don’t save any of the lab files this way!

Vignettes #

with White or Color Backgrounds#

Highlighting Foreground #

Using Free Select

here picture

Step #1 - Create Layer#

Load Phone Booth picture
Duplicate the layer with the picture
- Layer ► Duplicate Layer
- You should have 2 layers
Rename the top layer
- Double-click the layer name
- Change name to Phone Booth
Rename the bottom layer
- Double-click the layer name
- Change name to Background

Step #2 - Create Mask#

Create a Mask using the Free Select tool
- Select an area around the phone booth
- Be sure that you have the Phone Booth layer selected
- Layer ► Mask ► Add Layer Mask
- Initialize Layout Mask to: Selection
Turn off your selection
- Selection ► None

Step #3 - Adjust the Layers#

Adjust the Mask
- Select the mask layer
- Blur the mask
  - Filters Blur ► Gaussian Blur
    - Make sure Horizontal & Vertical are locked
    - Enter 400
Adjust the Background layer
- Select the Background layer
- Use Colors ► Brightness & Contrast
  - Decrease Brightness (quite a bit, like -125)
  - Decrease Contrast (a little, like -15)
- Blur the layer (about 100)
Export as freeSelect.jpg

Partial Color Effect#

Using Foreground

Select Tool

picture

Step #1 - Create Layer#

Open Galen picture
Use Scissors Select tool to cut around the picture
- Click on the actual line that you want to cut along
- Be sure that you click on the first point at the end
- Click inside – you should get a dotted line around your selection.
Use this selection to create a mask
- You should see grey checkerboard behind the two figures that you cut out.

Step #3 - Create Mask#

Create a Mask
- Be sure that you have the Foreground layer selected
- Layer ► Mask ► Add Layer Mask
- Initialize Layout Mask to: Selection
- Do not blur the mask

Turn off your selection
- Selection ► None

Step #4 – Adjust Background#

Touch up around the mask by painting black or white in the mask layer

Convert Background to B&W
- Select Background layer
- Colors ► Desaturate

Export as Partial Color.jpg

Using Green Screen#

http://coweb.cc.gatech.edu/ice-gt/uploads/738/ICE%20025.jpg

http://exotic-place.com/wp-content/uploads/2013/12/new-york-skyline-exotic-place1.jpg

Step #1 – Foreground Select#

Load Green Screen picture
Click on the Foreground Select tool
- Free select around foreground
  - Be sure to close the loop
  - Stuff in foreground should be blue when done
- Select the foreground
  - Paint the foreground area (you don’t need it all)
  - Be sure to wait for refresh between painting
  - Repeat until you have it all (i.e. all blue)
  - Unpaint background, click the Mark background button.
Press Enter to create the selection mask.

Step #2 - Create Mask#

Add Mask
- Layer ► Mask ► Add Layer Mask
- Initialize Layout Mask to: Selection

Turn off your selection
- Selection ► None

Step #3 – Add Background#

Use File ► Open as Layers
- Open the New York City image
- Notice that it places it on top of the other layers
- Put the Nice Background layer behind the other layer by dragging the layer down in the Layers sidebar.
Resize the Canvas
- Image ► Fit Canvas to Layers
- Ctrl-Shift-J

Step #4 – Move Foreground Image#

Place the girl
- Select the foreground layer
- Click on the Move tool
- Drag the foreground where you want it

Export the Image as Flying
- If you wanted to save as a GIMP image, this would be a good time to do it. Don’t do this

Copy & Paste as a Layer#

picture

Copy & Paste as a Layer#

Use Rectangular Selection Tool to select an area next to the reflection about the same size
Copy
Paste as a New Layer
Select the Move Tool and move the piece into place over the reflection
Save using the original name

Fading between Two Images#

picture

Fading between Two Images#

Start with picture named Left
Image ► Canvas Size
- Make the size 1800 by 1500
  - You need to click on the link so you can set individually
Select the half of the picture
Blur the Mask
- Be sure to Select ► All
- Filters ► Blur ► Gaussian Blur
  - 200 horizontal, 0 vertical
Put Right picture in a second layer
Save as Fade.jpg

Galen in the Garden#

Assignment#

Hand in the photos you edited based on the PowerPoint
- Galen in the Garden is optional
Create a picture of yourself in an impossible situation.
- Although impossible, it should look realistic
- Use images of reasonable resolution, at least 800 by 600.
- Be careful with creating the mask, it will be part of your grade.

Examples of Impossible Situations#

Find & Replace

Match Case RegExp