The Book of GIMP by Delvare, Karine -- Read -- Imperial Library of Trantor

Index

The Book of GIMP: A Complete Guide to Nearly Everything Introduction

This Book The Authors Production Notes Conventions Acknowledgments

I. Learning GIMP

1. Getting Started

1.1 GIMP Basics

The Screen Layout Dockable Dialogs The Toolbox The Single-Window Interface

1.2 Image Handling Basics

Opening an Image Maximizing an Image Scanning

Previewing the Picture Selecting and Scanning

Image Window Menus Zooming Saving an Image

1.3 Working with Images

Resizing an Image Cropping an Image Adding a Frame with Filters Using Layers Drawing in GIMP Printing with GIMP

1.4 Using a Tablet

Installing a Tablet The Tablet Mouse and Stylus Working with a Tablet in GIMP

1.5 Exercises

2. Photograph Retouching

2.1 Tutorial: Enhancing Badly Taken Photographs

Cropping, Straightening, and Restoring Perspective Correcting Exposure Correcting the Color Balance Removing an Object Improving Sharpness Removing Red Eye

2.2 Global Transformations

Resizing an Image Shearing an Image Changing Brightness, Contrast, and Levels Adjusting Colors

2.3 Local Transformations

Making a Selection

The Selection Tools Options Simple Selection Tools The Scissors Select Tool The Foreground Select Tool

Modifying Sharpness Modifying Brightness Using the Clone Tool Perspective Cloning More Correction Methods for Red Eye

First Method: Selecting the Red Channel Second Method: Selecting the Red Spots

Changing the Sky of a Landscape

2.4 Retouching a Scanned Photograph

Correcting Colors Correcting Scratches and Spots Restoring Very Old Photographs

2.5 Advanced Techniques

Making a Photograph Look Older Improving a Portrait Using Multiple Captures of the Same Scene

2.6 Exercises

3. Drawing and Illustration

3.1 Tutorial: Colorizing a Drawing

The Black and White Drawing Using Layers to Keep Outlines Visible Defining Objects and Base Colors Coloring the Mushrooms Shading Finishing Touches

3.2 Painting and Drawing

Brushes The Pencil Tool

Drawing an Icon Pixel Art

The Paintbrush Tool The Airbrush Tool The Ink Tool

3.3 Filling an Area

The Bucket Fill Tool Gradients Patterns

3.4 Dodging, Burning, and Smudging

The Dodge/Burn Tool The Smudge Tool

3.5 The Digital Painting Process

Composition Sky and Clouds Mountains Hills Grassland Trees River

3.6 Drawing Shapes

Drawing a Straight Line Drawing Ellipses and Rectangles Drawing a Complex Shape

3.7 Exercises

4. Logos and Textures

4.1 Tutorial: Making a Luggage Tag 4.2 Textures

Tiling

The Make Seamless Filter Other Filters for Generating a Tilable Image

Creating Textures

Building the Background Transforming the Background Other Texture Tools

Using the Blend Tool

Some Simple Blending Effects The Difference Blending Mode Using Edge Detection A Piece of Silk Hanging Drapes

Using the Noise Filters

First Method: The Brushed Metal Effect Second Method: A Canvas Texture Third Method: A Wood Texture

Using the Embossing Filters

First Example: A Realistic Canvas Texture Second Example: A Water-like Texture Third Example: The Scott Effect Fourth Example: A Stone Texture

More Ways to Create Textures

Using a Gradient Brush Using a 1-Pixel-Wide Layer Constructing by Hand

4.3 Logos

The Text Tool Adding Relief Proper Shade vs. Cast Shadow

Generating a Cast Shadow Adding Relief and Proper Shade

Applying a Texture

A Burning Logo A Radioactive Logo A Golden Logo A Textured Logo

4.4 Exercises

5. Composite Photography

5.1 Tutorial: Building a Composite Portrait

Taking Features from Different Portraits Smoothing Transitions

5.2 Selections, Overlaying, and Blending Modes

Masks and Selections Overlaying Images Using Blending Modes

5.3 Building a Panorama

Taking the Pictures Superimposing the Pictures Touching Up the Panorama The Pandora Plug-in

5.4 Image Overlaying

Digital Collage Self-Compositing A Composite Photography Project

5.5 Exercises

6. Animation

6.1 Tutorial: Animated Text

Method One: Frame by Frame Method Two: Filtering All Layers Method Three: Moving Along a Path

6.2 Building an Animated GIF by Hand

Drawing a Rainbow Daisy Zooming Toward the Viewer Adding Rain to a Landscape Adding Snow to a Landscape

6.3 Using Animation Tools

Interactive Deformation Animating a Still Image Morphing

6.4 Using GAP

The Move Path Tool Binocular Animation Improving the Binocular Animation

6.5 Exercises

7. Image Preprocessing

7.1 Tutorial: Extracting Information from a Picture

Dynamics Extension Histogram Modification Noise Reduction Edge Detection

7.2 The Principles of Preprocessing

Subjective Aspects of Preprocessing Histograms and Decomposition into Channels Extracting Information through Dynamics Extension

7.3 Filtering

The Principles of Filtering Characteristic Matrices Comparing the Built-in Filters

7.4 Edge Detection

The Principles of Edge Detection Edge Detection Methods

7.5 Exercises

8. Designing a Website

8.1 Tutorial: Laying Out a Website

Planning Layout Adding Color Choosing a Color Palette

8.2 Fixed- and Variable-Width Designs 8.3 Web Design Tools

Image Map

Image Map Tools Useful Image Map Dialogs

Semi-Flatten Slice

8.4 Optimizing Images for the Web

JPEG GIF PNG Transparency

8.5 Exercises

II. Reference

9. The GIMP Interface

9.1 The Main Windows

Multi-Window Mode Single-Window Mode Docking Windows and Dockable Dialogs The Image Window

9.2 Fundamental GIMP Commands

Closing Windows and Quitting GIMP Working with Multiple Images Common Tab Menu Options

9.3 Working with the GIMP Interface

Menus Keyboard Shortcuts Keyboard Tips Clicking and Dragging

9.4 Creating, Loading, Saving, and Exporting Files

Creating a New Image Loading a Web Page as an Image Loading an Image from a File Saving an Image Exporting an Image

9.5 Undoing 9.6 The GIMP Help System

10. Display

10.1 Rulers and Units 10.2 Guides 10.3 Grids 10.4 Zoom 10.5 Using Multiple Views

11. Layers

11.1 The Layers Dialog

Components of the Layers Dialog A Layer Entry in the Layers Dialog Keyboard Shortcuts in the Layers Dialog Uses of the Layers Dialog

11.2 The Layers Menu 11.3 Layer Groups 11.4 The Image: Layer Menu

The Stack Menu The Mask, Transparency, and Transform Menus The Final Five Entries

12. Color

12.1 Concepts

Color Models Stored Representations Indexed Mode

12.2 Blending Modes

Modes That Leave Pixels Intact Lightening Modes Darkening Modes Luminosity Modes Color Distortion Modes HSV Modes

12.3 Color Management

Color-Managed Workflow Using Color Management

12.4 The Major Color Tools

The Color Chooser Levels Curves

12.5 Additional Color Tools

Color Balance Hue-Saturation Colorize Brightness-Contrast Threshold Posterize Desaturate Inversion

12.6 The Color Submenus

The Auto Submenu

Equalize White Balance Color Enhance Normalize Stretch Contrast Stretch HSV

The Components Submenu

Channel Mixer Decompose Recompose Compose

The Map Submenu

Rearrange Colormap Set Colormap Alien Map Color Exchange Gradient Map Palette Map Rotate Colors Sample Colorize

The Info Submenu

Histogram Border Average Colorcube Analysis Smooth Palette

The Remaining Color Tools

Color to Alpha Colorify Filter Pack Hot Maximum RGB Retinex

13. Selections

13.1 What Is a Selection?

A Selection as an Outline A Selection as a Grayscale Image

13.2 The Seven Selection Tools

Common Options The Rectangle Select Tool The Ellipse Select Tool The Free Select Tool The Fuzzy Select Tool The Select by Color Tool The Scissors Select Tool The Foreground Select Tool

13.3 The Paths Tool

Building a Path Modifying a Path Using a Path The Paths Dialog

13.4 Using Selections

The Select Menu The Edit Menu Modifying the Selection Border

14. Masks

14.1 Selection Masks

The Channels Dialog Creating a Selection Mask The Quick Mask Tool

14.2 Layer Masks

Building a Layer Mask Manipulating a Layer Mask Using a Layer Mask

14.3 Using Masks and Channels

Building a Natural Mask Transparency and the Alpha Channel Converting Masks, Selections, and Channels

15. Drawing Tools

15.1 Digital Art 15.2 An Overview of the Drawing Tools 15.3 Shared Features

Drawing Tool Options Paint Dynamics Using Dockable Dialogs with Drawing Tools

The Dialog Menu Using Tags

Six Useful Dockable Dialogs

The Brushes Dialog The Patterns Dialog The Gradients Dialog The Palettes Dialog The Device Status Dialog The Tool Presets Dialog

15.4 The Fill Tools

The Bucket Fill Tool The Blend Tool

15.5 The Painting Tools

The Pencil Tool The Paintbrush Tool The Eraser Tool The Airbrush Tool The Ink Tool

15.6 The Cloning Tools

The Clone Tool The Heal Tool The Perspective Clone Tool

15.7 The Modifying Tools

The Convolve Tool The Smudge Tool The Dodge/Burn Tool

15.8 The Text Tool

The Text Tool Options Choosing a Font Using the Text Tool Editing Your Text

15.9 The Color Picker Tool and the Measure Tool

The Color Picker Tool The Measure Tool

15.10 Combining Tool Presets, Brushes, and Paint Dynamics

Getting to Know the Dialogs Involved Predefined Paint Dynamics Predefined Brushes Predefined Tool Presets

16. Transformation Tools

16.1 Global Transformations

Transforming an Image Resizing an Image Cropping an Image Transforming a Layer

16.2 Local Transformations

Shared Properties The Move Tool The Align Tool The Crop Tool The Rotate Tool The Scale Tool The Shear Tool The Perspective Tool The Flip Tool The Cage Transform Tool

17. Filters

17.1 Common Properties 17.2 The Blur Filters

Blur Gaussian Blur Motion Blur Pixelize Selective Gaussian Blur Tileable Blur

17.3 The Enhance Filters

Antialias Deinterlace Despeckle Destripe NL Filter Red Eye Removal Sharpen Unsharp Mask

17.4 The Distorts Filters

Apply Lens Curve Bend Emboss Engrave IWarp Lens Distortion Mosaic Newsprint Pagecurl Polar Coordinates Ripple Shift Value Propagate Waves Whirl and Pinch Wind

17.5 The Light and Shadow Filters

Gradient Flare Lens Flare Lighting Effects Sparkle Supernova Drop Shadow Perspective

17.6 The Noise Filters

HSV Noise Hurl Pick RGB Noise Slur Spread

17.7 The Edge-Detect Filters

Difference of Gaussians Edge Laplace Neon Sobel

17.8 The Generic Filters

Convolution Matrix Dilate Erode

17.9 The Combine Filters

Depth Merge

17.10 The Artistic Filters

Apply Canvas Cartoon Clothify Cubism GIMPressionist Glass Tile Oilify Photocopy Softglow Van Gogh Weave

17.11 The Decor Filters

Add Bevel Add Border Coffee Stain Fuzzy Border Old Photo Round Corners

17.12 The Map Filters

Bump Map Displace Fractal Trace Illusion Make Seamless Map Object Paper Tile Small Tiles Tile Warp

17.13 The Render Filters

Clouds Filters

Difference Clouds Plasma Solid Noise

Nature Filters

Flame IFS Fractal

Pattern Filters

Checkerboard CML Explorer Diffraction Patterns Grid Jigsaw Maze Qbist Sinus

Circuit Fractal Explorer Gfig Lava Line Nova Sphere Designer Spyrogimp

18. Animation Tools

18.1 Principles of Animation

Frame Frequency and Vision Frames and Layers Output Formats Optimizing Animations

18.2 Tools for Building Multilayer Animations

Animating by Hand The IWarp Tool The Morph Tool

Morphing Text The Morph Tool Dialog

Filtering All Layers

18.3 The Animation Menu

Blend Burn-In Rippling Selection to Animimage Spinning Globe Waves Optimizing and Playing an Animation

18.4 The Move Path Tool

Choosing the Source Layers Choosing the Destination Frames Applying Transformations Control Points Key Frames The Preview Window Testing the Move Path Tool Advanced Settings

18.5 The Video Menu

Manipulating Frames Converting Between File Formats Modifying Frames Altering Layers Converting Between Multilayer and Multiframe Encoding Playback and Navigator Split Video into Frames Bluebox Onionskin Storyboard

19. Obtaining and Printing Images

19.1 Capturing Screenshots 19.2 Scanning

Scanners and Drivers XSane and GIMP Selecting an Area to Scan Setting the Scanning Parameters Scan Modes Scanning Resolutions Color Handling

19.3 Digital Cameras

Importing Photographs into GIMP Choosing a Format Handling Raw Photographs

19.4 Printing

The Principles of Printing Printing with the GTK Interface Printing with Gutenprint

19.5 Scanning and Printing with Windows

20. Image Formats

20.1 An Overview of File Formats

Raster and Vector Formats Lossless and Lossy Compression Layout Engines and Browsers

20.2 JPEG, GIF, and PNG

JPEG

Exporting to JPEG

GIF

Exporting to GIF

PNG

Exporting to PNG

20.3 GIMP’s Native Formats

XCF Other Native Formats

20.4 Other Useful Formats

PostScript and PDF TIFF Netpbm Formats SVG Additional Formats Supported by GIMP

21. Scripts and Plug-ins

21.1 About Scripts and Plug-ins

Scheme, Python, and C Installed Plug-ins Finding New Plug-ins

21.2 Noteworthy Plug-ins

Photo Effects G’MIC Liquid Rescale Elsamuko Scripts

21.3 Writing Plug-ins

Scheme Python C

22. Customizing GIMP

22.1 The Preferences Dialog

Environment User Interface Theme Help System Tool Options Toolbox Default New Image Default Image Grid Image Windows Display Color Management Input Devices Window Management Folders

22.2 Additional Preferences in the Edit Menu

Keyboard Shortcuts Modules Units

22.3 Customizing Image Views

Display Filters Hiding or Revealing Parts of the Image Window Padding Colors and Snapping

22.4 Building New Brushes

Defining an Ordinary Brush Defining a Color Brush Defining an Animated Brush Defining a Parametric Brush

22.5 Building New Patterns 22.6 Building New Gradients

The Gradient Editor The Gradient Editor Menu Building a Gradient

22.7 Building New Palettes

The Palette Editor Importing Palettes Exporting and Duplicating Palettes Palette to Gradient and Sort Palette Indexed Palettes

III. Appendices

A. Vision and Image Representation

A.1 The Physiology of Vision

How the Human Eye Works Color Perception Color Blindness Optical Illusions

A.2 Image Representation

Discretization Digitalization Compression

A.3 Color Representation

How Colors Are Produced The Additive Model The Subtractive Model The HSV Model

A.4 Exercises

B. Tips and Hints for Selected Exercises

Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Chapter 7 Chapter 8 Appendix A

C. Resources

C.1 Official GIMP Pages C.2 Related Official Sites C.3 Tutorials C.4 Communities and Blogs C.5 Brushes and Plug-ins

Brush Sets Plug-in Sets

C.6 Mailing Lists and IRC Channels C.7 Other Graphics Applications C.8 Related Graphics Software Projects C.9 Other Graphics Sites

D. Frequently Asked Questions

D.1 What Does the Future Hold? D.2 How...?

How can I draw a straight line? How can I draw a circle? How can I create an outline around text? How do I save a selection within an image to a file? How do I merge an image from another file with the current image? How do I get small fonts to look as nice as large fonts? How do I set keyboard shortcuts? How do I set up GIMP so a layer becomes active when I click an element in that layer? How do I fill a layer or selection with transparency? How do I draw in a different color? How do I add a blur to my image? How can I paint along the outline of a rectangle? How do I move existing guides? How do I get rid of a floating selection? How do I paint in a transparent area? How can I see the marching ants and know whether my selection has been made? How can I add color to a black and white image? How do I resize my photo to a precise size, say 5 × 7 cm? How do I set the foreground color to a color in my image? How can I keep text sharp when scaling it down? How do I copy a layer mask to another layer mask? How can I search for a specific font, brush, or pattern? How do I erase with a tool other than the Eraser? How can I use the Scale tool to enlarge an image? How can I find a dialog I closed by accident? How can I invert grayscale values without changing the colors? How do I crop with a defined aspect ratio?

D.3 Why...?

Why are some of the filter names grayed out? Why is nothing happening? Why doesn’t anything happen when I try to cut, paste, or apply a filter to a selection? Why can’t I modify the channel I built by saving a selection? Why can’t I change my image after I saved a selection to a channel? Why do my paint strokes appear on the image when I try painting on a layer mask? Why did the size of my file increase when I exported it to JPEG with 100% quality? Why can’t I draw in the color I chose?

E. Installing GIMP

E.1 GNU/Linux and Unix

Debian Ubuntu Mint Fedora OpenSUSE Mandriva Other Unix-like Operating Systems

E.2 Windows E.3 Mac OS X

F. Batch Processing

F.1 GIMP Batch Mode F.2 David’s Batch Processor F.3 ImageMagick

Calling ImageMagick Building Thumbnails Labels and Transformations

Index About the Authors Copyright

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