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Archive for the ‘gimp’ Category

Installing, finding and using Gimp plugins

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So you want to do more with the Gimp now that you have the basics down. There are hundreds of plugins for the Gimp in existence and more coming all the time.

Installing and using a Gimp plugin:

- If it is a .gzip, tar.gz, .zip, .rar file unpack it

- Copy it to your gimp/plugins folder

( usually \lib\gimp\2.0\plug-ins )

or ( /lib/gimp/2.o/plugins ).

On my Mac I put new plugins in ( /Users/herself/.gimp2-4/plug-ins )

That’s it. It will be there the next time you start up the Gimp.

Finding Gimp plugins:
- Most plugins can be found in the Gimp Registry
- TechZilo has a list of 40 favorite plugins

You can also try PSPI which will let you run some Photoshop plugins in Gimp

Written by Linda MacPhee-Cobb

February 13th, 2008 at 5:00 am

Posted in gimp,how to

How to create HDR images in Gimp with a single image

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HDR images are normally shot with your camera set up on a tripod and several images are taken of the same view in various lighting conditions. Then you layer the images on top of each other and blend them. If you want to learn how to do proper HDR images in Gimp try Flickr – Discussing HDR in Gimp. You’ll find everything you need there. Or try the Gimp blending exposures tutorial.

But if you are like me and taking wildlife shots you will find that the wildlife generally isn’t too keen on sitting and posing for several hours while the sun moves. Or maybe the local security officer is wiggy about you being parked in front of a building for several hours with a camera. So you only have one image to make it work.

before:

after:

First make a copy of your photo and open it in Gimp. ( You know better than to work on your originals right? )

Open up a layers dialog ( Dialogs->Layers )

Create a copy of the layer by clicking on the double image button at the bottom of the layers window.

Hide the top layer by clicking on the eye.

Select the bottom layer by clicking on it.

Go to your image and select Colors->Levels then Auto->OK

This makes your whites whiter and your blacks blacker. Don’t worry about whether it looks ok or not.

Go back to the Layers window and click the eye to make the top layer visible again

Click on the top layer to select it.

Select Mode->Multiply

Now adjust the opacity until you are happy with the image.

On darker images you might find Mode->Overlay works better

Also you might also try adjusting just one color in your color levels. In the Levels box Channel has a drop down menu – you can select all or a color to adjust.

On some images I adjust the levels on the top layer instead of the bottom. You want to experiment a bit and see what works best with your photos.

Another option is to open Filters->Lighting effects and add a light to one layer before blending the photos.

Here are Some excellent examples of HDR
And here are some more to get you motivated.
20 Beautiful HDR Pictures

Written by Linda MacPhee-Cobb

February 6th, 2008 at 5:00 am

Posted in gimp,graphics,how to

How to turn your photo into a 3d wood carving in Gimp

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Before:

After:

1) Open a copy of your photo in Gimp
2) Select Dialogs->Layers ( a layer box will open )
3) Click on the copy layer button ( button with two photos on bottom row of buttons )
4) Select bottom layer by clicking on it in layers box
5) Go back to photo and select Filters->Distorts->Emboss ( an emboss box will open )
6) Select Emboss not Bumpmap
7) Click the OK button in the emboss box ( it may take a minute or two for the emboss function to finish)
8 ) Go back to the layers box Click Mode: and select Multiply from the drop down menu
9) Adjust the Opacity in the layers until you are happy with the result

* If you want to see what the bottom layer looks like before adjusting the layers just click the eye button next to the top layer and the top layer will become invisible.

This works better with less detailed photos than it does with more detailed photos.

Written by Linda MacPhee-Cobb

January 10th, 2008 at 5:00 am

Posted in gimp,graphics,how to

Create a CG photo effect for your website graphics using Gimp

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Before:

After:

This is a very easy effect to create with The Gimp.

1) Open a copy of the photo you wish to change to CG
2) Go to Dialogs-> Layers ( a layer dialog box will appear )
3) Click the duplicate button in the Layers box ( button with 2 photos on bottom )
4) Select the bottom layer by clicking on it in the layers box
5) Go back to your photo and click Filters->Artistic->Cartoon ( a cartoon box will appear )
6) Click OK in the cartoon box
7) Go back to the Layers box and select the copy layer ( just click on it )
8 ) Go to the Mode drop down menu and select Overlay
That’s it!

When you do the cartoon effect you won’t see it because you are doing it on the bottom layer but the top layer is covering the bottom one. Just trust the directions.

Written by Linda MacPhee-Cobb

January 3rd, 2008 at 5:00 am

Posted in gimp,graphics,how to