BFTAWBDPA Workshop

Introduction to GIMP

Chris Kundinger-cjkundin@us.ibm.com

2.16.08

Some Image Types

Bitmap () JPEG (Web) TIFF (Printing) GIF (Small, few colors) PNG (Replace for GIF) XCF (GIMP)

Bitmap

Microsoft Paint’s default Uncompressed Windows wallpaper Large file sizes

JPEG or JPG

Commonly used for pictures (and cameras) Small file sizes (great for web) File size vs quality (user can change) Lossy data compression

GIF

Static or animated Index colors (256 colors) non-photographic type images (buttons…)

TIFF

Great for printing (Great quality) Large files Optional compression LZW (lossless)

PNG

Portable Network Graphic W3C standard to replace GIF Doesn’t lose quality (lossless) Transparent

XCF

GIMP’s file extension Preserves your image as a “working project”

Layers Colors History Attributes

Image Type Summary

Bitmap (Large file size) JPEG (Web Images, small files size) TIFF (Best quality, ideal for Printing, larger file size) GIF (Small, few colors – 256 max, animate,

transparent) PNG (Replace for GIF, 16 million colors,

transparent, animate) XCF (Preserves layers and other GIMP attributes to

create a “working project”)

Printing vs Web(screen)

Printing dpi: 150 – 300, 400 – 1500 (Pros) CMYK (Cyan, Magenta, Yellow, Key (black) ) TIFF or JPEG images

Screens dpi: 72 RGB (Red, Green, Blue) JPEG, GIF, or PNG images

PixelShort for Picture Element

NO inherent height or width NO inherent shape One color (any color) A Screen Resolution (1280x1024)

GIMP (GNU Image Manipulation Program)

Installing GIMP

Installing GIMP

Introduction to GIMP(Toolbar panel)

Tools

Properties of the tool

Introduction to GIMP(Image panel)

Tools

Properties of the tool selected

Ruler Zoom

Introduction to GIMP(Other panels)

Layers Fonts Colors

Panel Layout

General topics

Canvas, Images, Layer, Selection Selection Layers Rotate, Scale, Mirror and Resize Crop Images Fill or outline selections

Canvas, Image, Layer, Selection

Canvas (entire boundary) – resize doesn’t affect imageImage (entire boundary) – resizes everything including canvasLayer (black and yellow dotted line) – only can edit within that box when you’re on that layerSelection (black and white dotted line) - Only changes within selection

Selection

Lasso – Draw your selection like a pencil

Circle – Select round images

Square – Select square images

Normal, Add, Subtract, Intersect

Wand – Select by similar color you select (touching)

Color – Select regions with similar color

Layers(part 1)

Image shown above

Current Layer selected (White background)

Top Layer (Transparent background)

Bottom Layer (Covered by current layer)

Layer – Hide or show it

Trash – Delete Layer

Add Layer – Move Layer – Duplicate Layer

Layers(part 2 – Pasting a picture)

Pasting into your picture produces this “Floating” selectionYou have two options:

1) Anchor the pasted later into the layer underneath

2) Create a new layer and put the pasted layer on top

Rotate, Scale, Mirror and Resize(only for layer, selection, or path)

Rotate

Scale

Shear

Perspective

Mirror

Crop

Make your selection

Right click on picture and selectImage -> Crop to Selection

Fill or Outline selection

1. Make a selection2. Pick your color (I used blue)3. Click the Edit menu4. Click “Fill with FG Color” (to fill)

or “Stroke Selection” (to outline)

Advanced Topics

Layer Mask (coming up…) Picture collage Enhance colors Picture touch up

Layer Mask(step 1)

1. Create two layers (Mask and Background)2. Select the top layer (as shown below)

Layer 1 - Mask

Layer 1 - Background

Layer Mask(step 2)

1. Use the wand tool to select the inside of the puzzle piece.

2. Delete your selection using the delete key once the space inside the puzzle is selected.

Layer Mask(step 3)

1. Continue to do that for the remaining pieces (feel free to try something creative with the black piece!)

GIMP Resources Gimp Resources

Tutorials, Inspiration, Patterns, Brushes & More

Gimp Tutorials http://www.gimp.org/tutorials/

DeviantArt http://browse.deviantart.com/resources/applications/gimpbrushes/

Hawsmont Universe http://hawksmont.com/blog/category/graphic_design/resources/gimp_brushes/

livejournal http://community.livejournal.com/gimpbrushes/

Snap2Objects – 85 Killer Resources Every Designer Should Know http://www.snap2objects.com/2007/06/06/85-killer-resources-every-designer-should-

know/ Smashing Magazine

http://www.smashingmagazine.com/category/showcase/