Difference between revisions of "The Gimp"
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==About the class== | ==About the class== | ||
| − | [[Image:Oso_speaks.gif|left|frame|Oso Says "Take the Gimp Class!]] | + | [[Image:Oso_speaks.gif|left|frame|Oso Says "Take the Gimp Class!]]The Gimp is the image editing software distributed on [[FreekBox]]es - and used by all kinds of people to make cool pictures. This is an introductory-level class, and should be accessable to anyone who has mastered the material taught in the [[FreekBox Adoption Class]]. |
<br style="clear:both" /> | <br style="clear:both" /> | ||
| Line 8: | Line 8: | ||
* [http://www.gimp.org/screenshots/ screenshots] | * [http://www.gimp.org/screenshots/ screenshots] | ||
* [http://docs.gimp.org/en/ documentation] | * [http://docs.gimp.org/en/ documentation] | ||
| + | * [http://en.wikipedia.org/wiki/Public_domain_images public domain images] | ||
== Class 1: Starting and Selections == | == Class 1: Starting and Selections == | ||
| Line 15: | Line 16: | ||
* [http://en.wikipedia.org/wiki/XCF Opening files, Saving Files] | * [http://en.wikipedia.org/wiki/XCF Opening files, Saving Files] | ||
* Freegeeks - Use Offline storage! Classroom machines are wiped clean every evening. | * Freegeeks - Use Offline storage! Classroom machines are wiped clean every evening. | ||
| − | * [http://docs.gimp.org/en/ | + | * [http://docs.gimp.org/en/introduction.html#introduction-help Help! Using context sensitive help] |
| − | * Palettes: [http://docs.gimp.org/en/ | + | * Palettes: [http://docs.gimp.org/en/concepts-beginners.html#gimp-concepts-toolbox Tools] & [http://docs.gimp.org/en/gimp-dialogs-structure.html#gimp-layer-dialog Layers], (but not Channels or Paths) |
| − | * [http:// | + | * [http://www.gimphelp.org/selections1.html Making selections] |
* Dealing with Floating Selections | * Dealing with Floating Selections | ||
| − | + | [[Image:World2.gif |left|frame]] Something fun - change the color of the background. | |
# use the elliptical select tool to select the earth in today's suggested image | # use the elliptical select tool to select the earth in today's suggested image | ||
# float the selection | # float the selection | ||
| Line 26: | Line 27: | ||
# add a new layer with a colored background (shift - new layer) | # add a new layer with a colored background (shift - new layer) | ||
# move the layers so the colored layer is underneath the earth | # move the layers so the colored layer is underneath the earth | ||
| + | <br style="clear:both" /> | ||
== Class 2: Color select and Magic wand == | == Class 2: Color select and Magic wand == | ||
| Line 32: | Line 34: | ||
* [http://www.gimp.org/tutorials/Lite_Quickies/ Resizing images], resizing selections | * [http://www.gimp.org/tutorials/Lite_Quickies/ Resizing images], resizing selections | ||
* [http://www.gimp.org/tutorials/Changing_Background_Color_2/ Color Select Tool] | * [http://www.gimp.org/tutorials/Changing_Background_Color_2/ Color Select Tool] | ||
| − | * Magic Wand | + | * [http://docs.gimp.org/en/gimp-tool-fuzzy-select.html Magic Wand] |
* Something fun - Float the [http://www.estesrockets.com/images/cosmos_300.jpg rocket] or the [http://upload.wikimedia.org/wikipedia/commons/8/84/Chrysaora_jelly.jpg jellyfish] (right click on the link to download) | * Something fun - Float the [http://www.estesrockets.com/images/cosmos_300.jpg rocket] or the [http://upload.wikimedia.org/wikipedia/commons/8/84/Chrysaora_jelly.jpg jellyfish] (right click on the link to download) | ||
# open today's suggested image | # open today's suggested image | ||
# open the rocket or jellyfish | # open the rocket or jellyfish | ||
| + | # use the layer palette to add an alpha channel [http://manual.gimp.org/en/gimp-layer-alpha-add.html how to do it] | ||
# Remove the background of the rocket or jellyfish by clicking on the background with the magic wand or color selection tool. (hint - the rocket is easier) | # Remove the background of the rocket or jellyfish by clicking on the background with the magic wand or color selection tool. (hint - the rocket is easier) | ||
# drag the layer (from the rocket or jellyfish layer panel) into the space cloud image | # drag the layer (from the rocket or jellyfish layer panel) into the space cloud image | ||
== Class 3: Edges, tools, fills, paths == | == Class 3: Edges, tools, fills, paths == | ||
| − | + | [http://memory.loc.gov/service/pnp/fsac/1a35000/1a35300/1a35371v.jpg Right click to download today's suggested image] | |
| − | * Edge Select | + | * [http://docs.gimp.org/en/gimp-tool-iscissors.html Edge Select] |
| − | * Move, Rotate, shear, perspective & flip | + | * [http://docs.gimp.org/en/gimp-tool-move.html Move], [http://docs.gimp.org/en/gimp-tool-rotate.html Rotate], [http://docs.gimp.org/en/gimp-tool-shear.html shear], [http://docs.gimp.org/en/gimp-tool-perspective.html perspective] & [http://docs.gimp.org/en/gimp-tool-flip.html flip] |
* Fill, Gradient, pattern paint | * Fill, Gradient, pattern paint | ||
| − | * [http://docs.gimp.org/en/ | + | * [http://docs.gimp.org/en/gimp-channel-dialog.html#gimp-qmask Quick mask] & save to path. ([http://www.gimp.org/tutorials/Quickmask/ tutorial on quickmask]) |
* path to selection | * path to selection | ||
* Manipulating Selections | * Manipulating Selections | ||
* Filters | * Filters | ||
| + | Something fun - isolate Rosie from the background | ||
| + | [[Image:Rosie.jpg |left|frame]] | ||
| + | # Use the edge select tool, save to path and quickmask to create a selection around Rosie | ||
| + | # duplicate the background | ||
| + | # Select and float Rosie to a new layer. Turn off her visibility | ||
| + | # use the motion filter on the duplicated background | ||
| + | # Turn the "floated" version of Rosie back on. | ||
| + | <br style="clear:both" /> | ||
| + | |||
| + | == Class 5: paths == | ||
| + | [http://openclipart.org/clipart//people/jazz_enrique_meza_c_02.svg Right click to download this sample image] | ||
| + | * When you open this document, be sure to "Import Paths" | ||
| + | * [http://docs.gimp.org/en/gimp-path-dialog.html The Paths dialog] | ||
| + | * Selection to path | ||
| + | * Path to selection | ||
| + | * [http://docs.gimp.org/en/gimp-using-paths.html#id3490057 Stroking a path] | ||
| + | * [http://docs.gimp.org/en/ch08s06.html#gimp-tool-path The Path Tool] | ||
| + | * Path from text | ||
| + | |||
| + | == Class 6: Common tasks == | ||
| + | * [http://www.gimp.org/tutorials/Red_Eye_Removal/ Red eye removal] | ||
| + | * [http://carol.gimp.org/gimp2/web/jpeg-reduction/ Saving for the web] | ||
| + | * Reducing the size of an image | ||
| + | |||
| + | == Class 7: Fixing Images == | ||
| + | [[Image:1440-25387.jpg |left|frame|A crappy photo taken with a cell phone. Right click to save this to your desktop ]] | ||
| + | |||
| + | * [http://docs.gimp.org/en/ch07s05s06.html Color Tools - Levels ] This tool can be used to adjust colors. It will be easier to understand this tool if you understand [http://en.wikipedia.org/wiki/Histogram histograms]. | ||
| + | * Use the Black Eyedropper to pick a black point. | ||
| + | * Use the White Eyedropper to pick a white point. | ||
| + | * Adjust mid-tones using the slider. | ||
| + | * Color cast can be adjusted using the channels and eyedroppers | ||
| + | * [http://docs.gimp.org/en/ch10s06s07.html Enhance - Unsharp Mask] | ||
| + | * [http://www.geocities.com/SiliconValley/Haven/5179/ Here is a good tutorial on color correction with gimp] | ||
| + | |||
| + | [[Image:Cellcam original.jpg |left|frame|A less-than-stellar photo. Right click to save this to your desktop ]] | ||
| + | [[Image:Cellcam fixed.jpg |left|frame|The same photo after adjusting color and sharpening ]] | ||
| + | [[Image:Colorwheel.jpg |left|frame|If we wind up talking about color correction, you're going to need a color wheel ]] | ||
| − | == Class | + | <br style="clear:both" /> |
| + | |||
| + | == Class 8: Retouching and layer masks == | ||
| + | |||
| + | Most images in magazines are highly deceptive. Take a look at some of these examples: | ||
| + | * [http://homepage.mac.com/gapodaca/digital/bikini/index.html Greg Apodaca] | ||
| + | * [http://www.briandilg.com/imaging/index.htm Brian Dilg] | ||
| + | * [http://www.glennferon.com/portfolio1/portfolio13.html Glenn C. Feron] | ||
| + | * [http://www.graphic-design.com/Photoshop/beauty_retouching.html tutorial on retouching faces] | ||
| + | |||
| + | == Class 9: animations == | ||
[[Image:Anirevloopmona.gif |left|frame|An example of GIMP animations ]] | [[Image:Anirevloopmona.gif |left|frame|An example of GIMP animations ]] | ||
[http://www.niemannross.com/animate%20mona_lisa.zip Today's image (warning, 4 megabytes) contains XCF files for use with GIMP] | [http://www.niemannross.com/animate%20mona_lisa.zip Today's image (warning, 4 megabytes) contains XCF files for use with GIMP] | ||
| Line 57: | Line 108: | ||
<br style="clear:both" /> | <br style="clear:both" /> | ||
| − | == | + | == class 10: Channels == |
| − | == | + | |
| − | + | ||
| + | == Frequently asked "How do I ... " == | ||
| + | * [http://www.ischool.utexas.edu/technology/tutorials/graphics/gimp/02_web_optimize/05_jpeg.html ...Save to a jpeg?] | ||
| + | * ...Save to a GIF? | ||
| + | * [http://software.newsforge.com/software/05/04/27/1327225.shtml ...Remove the background or isolate a part of the foreground?] There are some basic steps... | ||
| + | ** [http://docs.gimp.org/en/gimp-layer-alpha-add.html Don't forget to add an alpha channel] | ||
| + | ** You may want to duplicate the layer first | ||
| + | ** [http://docs.gimp.org/en/gimp-dialogs-structure.html#gimp-layer-dialog Select the layer you want to work on] | ||
| + | ** Select the area you want to remove (or isolate) using one of the [http://docs.gimp.org/en/gimp-using-selections-free-select.html selection tools] | ||
| + | ** Delete the selection | ||
| + | |||
| + | |||
[[category: Classes]] | [[category: Classes]] | ||
Latest revision as of 15:23, 29 January 2007
About the class
Oso Says "Take the Gimp Class!
The Gimp is the image editing software distributed on FreekBoxes - and used by all kinds of people to make cool pictures. This is an introductory-level class, and should be accessable to anyone who has mastered the material taught in the FreekBox Adoption Class.
Related Links
From the project's web site, gimp.org:
Class 1: Starting and Selections
right-click to download today's suggested image
- Finding and starting the Gimp
- Navigating the Gimp
- Opening files, Saving Files
- Freegeeks - Use Offline storage! Classroom machines are wiped clean every evening.
- Help! Using context sensitive help
- Palettes: Tools & Layers, (but not Channels or Paths)
- Making selections
- Dealing with Floating Selections
Something fun - change the color of the background.
- use the elliptical select tool to select the earth in today's suggested image
- float the selection
- convert the selection to a new layer
- change the foreground color (click on the black box in the tool palette)
- add a new layer with a colored background (shift - new layer)
- move the layers so the colored layer is underneath the earth
Class 2: Color select and Magic wand
Right-click to download today's suggested image
- Brief review
- Resizing images, resizing selections
- Color Select Tool
- Magic Wand
- Something fun - Float the rocket or the jellyfish (right click on the link to download)
- open today's suggested image
- open the rocket or jellyfish
- use the layer palette to add an alpha channel how to do it
- Remove the background of the rocket or jellyfish by clicking on the background with the magic wand or color selection tool. (hint - the rocket is easier)
- drag the layer (from the rocket or jellyfish layer panel) into the space cloud image
Class 3: Edges, tools, fills, paths
Right click to download today's suggested image
- Edge Select
- Move, Rotate, shear, perspective & flip
- Fill, Gradient, pattern paint
- Quick mask & save to path. (tutorial on quickmask)
- path to selection
- Manipulating Selections
- Filters
Something fun - isolate Rosie from the background
- Use the edge select tool, save to path and quickmask to create a selection around Rosie
- duplicate the background
- Select and float Rosie to a new layer. Turn off her visibility
- use the motion filter on the duplicated background
- Turn the "floated" version of Rosie back on.
Class 5: paths
Right click to download this sample image
- When you open this document, be sure to "Import Paths"
- The Paths dialog
- Selection to path
- Path to selection
- Stroking a path
- The Path Tool
- Path from text
Class 6: Common tasks
- Red eye removal
- Saving for the web
- Reducing the size of an image
Class 7: Fixing Images
A crappy photo taken with a cell phone. Right click to save this to your desktop
- Color Tools - Levels This tool can be used to adjust colors. It will be easier to understand this tool if you understand histograms.
* Use the Black Eyedropper to pick a black point. * Use the White Eyedropper to pick a white point. * Adjust mid-tones using the slider. * Color cast can be adjusted using the channels and eyedroppers
A less-than-stellar photo. Right click to save this to your desktop
The same photo after adjusting color and sharpening
If we wind up talking about color correction, you're going to need a color wheel
Class 8: Retouching and layer masks
Most images in magazines are highly deceptive. Take a look at some of these examples:
Class 9: animations
An example of GIMP animations
Today's image (warning, 4 megabytes) contains XCF files for use with GIMP
- Animations
class 10: Channels
Frequently asked "How do I ... "
- ...Save to a jpeg?
- ...Save to a GIF?
- ...Remove the background or isolate a part of the foreground? There are some basic steps...
- Don't forget to add an alpha channel
- You may want to duplicate the layer first
- Select the layer you want to work on
- Select the area you want to remove (or isolate) using one of the selection tools
- Delete the selection