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  1. #1
    OS Veteran Kimono's Avatar
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    Thumbs up GIMP Tutorials


    GIMP Tutorials
    Introduction
    Gimp is a software raster image editor and is similar to the graphics editing program, Photoshop. However, unlike Photoshop, Gimp is free and easier to use. GIMP, which originally stood for General Image Manipulation Program, was later changed to GNU Image Manipulation Program, and is able to do most of the things Photoshop can. The reason why Photoshop is preferred in the professional setting is because Photoshop is more robust and high-end.


    The following posts will not be a guide to understanding GIMP, but tutorials of what I think is the foundation of creating complex image manipulations. Okay fine, maybe that was an overstatement, but at the very least the following tutorials will include techniques that you will definitely use often.

    I know you can just search GIMP tutorials on the web, but hey, you're here right now aren't you? ;)


    Contents
    • Removing Backgrounds (Complete)

    • .GIF Animations (In Progress)

    • Text Effects

    • Effects

    • Photo Manipulation

    • Coloring/Digital Painting

    • Other

    • PS to GIMP translations


    ---
    Special thanks to Qualtz for making me do this ~
    Last edited by Kimono; 04-13-2013 at 08:20 PM.

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    OS Veteran Kimono's Avatar
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    Removing Backgrounds
    This is probably what most people want to learn how to do or request for others to do. Removing backgrounds from images on GIMP is pretty much the same on Photoshop with a few (very) minor differences. In GIMP there isn't a BG eraser tool and a magic eraser tool, so those "shortcuts" are not available. The Paths tool and other selection tools, the standard eraser, the brush tool, and masks really your only tools for the job.

    Method 1: The Paths Tool (Destructive)
    This rendering method is destructive because you are modifying the original image. Think of it like chipping away at stone or wood to make a carving. This method isn't necessarily a bad method, but it's hard to fix mistakes when you can no longer undo the event of the mistake.


    (Click for larger image)

    • Step 1: Prepare your image.



    (Click for larger image)

    • Step 2: Use the Paths Tool (B) to trace around what you want to render. Zoom in to the image to get a better view of the lines. Remember the more points you put, the outcome will be a lot more smoother/better.



    (Click for larger image)

    • Step 3: Once you've gone around and reached your starting point, you have closed your path. Go to your Paths dialog box, right-click your path, and select "Path to selection."



    (Click for larger image)

    • Once you have done that, what seems like dots of ants running around your path should appear - this means that you have made a selection. However, what we really want to select isn't the character/object we traced. We want to select everything else but that :3



    (Click for larger image)

    • Step 4: Go to Select > Invert. Now everything else but your original selection is selected. Go ahead and delete it by either pressing the delete key on your keyboard, or manually erasing it with the eraser tool.



    (Click for larger image)

    • If you deleted the selection and white appears, that means there isn't an alpha channel in your image. (An alpha channel is basically a portion of pixels' data that holds its transparency info. Basically, it's responsible for making your image transparent.) To add an alpha channel, right-click your layer and select "Add alpha channel." Now delete the same selection again. A grey looking checkered pattern should replace the white. This checkered pattern means that portion of the image is transparent.



    (Click for larger image)

    • Step 5: Go to File > Export... and export it as a PNG.


    • Click on "Select File Type" near the bottom of the dialo box. Scroll down the list and select PNG Image. Save.



    (Click for larger image)

    • Make sure "Save color values from transparent pixels" is selected, and then save your image.


    • "Uncheck save background color"


    Press save, and your'e done! ~

    Method 2: Masks (Non-Destructive)
    This method of rendering does not erase or tamper with your original image, but instead covers up or masks it. This is useful if you still need the original image later on. This method is preferred when dealing with complex selections or non-anime images.

    • Step 1: Add alpha channel to layer


    (Click for larger image)

    • Step 2: Duplicate layer


    • Step 3: On the duplicate layer, increase the contrast between the subject and the background.


    (Click for larger image)

    • Colors > Curves

    • Drag the bottom and top end of the line inwards.


    • Desaturate



    (Click for larger image)

    • Colors > Desaturate

    • Decide which of the three provides the most contrast.


    • Step 4: Invert and brush

    • Colors > Invert



    (Click for larger image)

    • Everything black will be masked, and everything white will appear.

    • Brush in parts of the subject you want to be included in the render with a white brush.



    (Click for larger image)

    • Step 5: Add Layer Mask

    • Right click original layer > Add Layer Mask



    (Click for larger image)



    • Step 6: Select duplicate layer > Cut

    • Edit > Cut



    (Click for larger image)

    • Step 7: Click on the Layer mask (the white image on the right) and paste the image

    • Edit > Paste



    (Click for larger image)


    (Click for larger image)

    • Select the floating layer and anchor it by clicking the anchor button (left of the trashcan)




    • Step 8 (optional): If you still need to touch up your image, select the Layer Mask (the black and white image on the right) and paint over it.


    • Step 9: Export as .png and save



    (Click for larger image)

    VoilÃ* ~
    Last edited by Kimono; 04-21-2013 at 02:32 PM.

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    .GIF Animations
    Work In Progress..
    Last edited by Kimono; 01-06-2013 at 01:29 AM.

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    Tutorial for adding images on text GIMP version

    So today well be learning about how to make text with image masked on it :)


    1. So lets start by making a new.

    Choose the final size what you want the work to be. (I'll be using size of signature here in OS height 150 x width 600)
    And set Fill with box as: Transparent



    2. now we should have nice Transparent Background.

    Like this:
    Spoiler :  



    Now let open the picture that we want to be on the text.
    Click file > Open as layer > choose pic > press open (the pictures size does not matter)






    3. Now lets move our just opened picture so that the area what we want in our text is visible (use the move tool).

    4. Add the text, size and font.






    5.
    Now Click the text layer from right side so that it shows as blue.
    Then click layer > Transparency > Alpha to selection.




    Now it should be surounded by these "runing ants"




    6. Now we move the picture layer above the text layer. (you should still see the running ants from the text)




    7. Right click the picture layer and choose Add layer mask.




    After you click "Add layer mask" it should open small window with few options.
    Mark "Selection" as chosen.




    8. Now Click Select > none




    And finally merge them all down :D




    9. Just "save As" and set the format as .PNG




    (After clicking save) it opens other small option box just
    click "export" and "save"





    Congratulations you now have text with image on it

    Here is the picture i made in this tutorial:

    Last edited by Kimono; 04-13-2013 at 08:16 PM.

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    Also, coming soon ~

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    Reserved ~

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    I expect to see awesomeness from this. It's about time I started to use Gimp.

    -Dera

    P.S. I saw you were reserving space, but I'm now on 1st page, I can delete my post if you want, just priv. msg. me if you want me to

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    HAHAHA~! GIMP's AWESOME:)

    I downloaded the tutorial manual on it but, it said "Download fail because of the missing plug-in"

    However I managed to design and prank pictures :)

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    Update (7/17/11): Rendering Tutorial added

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    Quote Originally Posted by kimono031 View Post
    Update (7/17/11): Rendering Tutorial added
    I love you now~~

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    OS Veteran Kimono's Avatar
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    They are coming soon.

    I have a lot of workload this semester, so I'll be spending very little time on OS and Photoshop/GIMP.

    OTL;
    Last edited by Kimono; 09-25-2011 at 01:29 PM.

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    I love you!!! thanks a bunch :)

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    thanks for the info~~!! :D

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    umm . .ive tried but i cant find the option where i need to type the "name".
    i am on this page....

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    Good tutorials :)
    BTW may i ask which is this theme, that you are using on your PC, its doesn't look like window's 7 nor mac..so which is this theme?
    My Anime List | TUMBLR | Twitter | MyDramaList | Steam

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    OS Veteran Kimono's Avatar
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    Quote Originally Posted by Ciloue View Post
    umm . .ive tried but i cant find the option where i need to type the "name".
    i am on this page....
    You should be able to input the name of your image file at the top of the dialogue box where it says "Name:"

    In my screenshot, I named my image "render.png"
    Last edited by Kimono; 11-20-2012 at 09:30 PM.

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    how do you put signatures???

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    Hey, kimono! How did you put an color on your path? I mean the dots on the path. :/ ?
    Last edited by Kimono; 03-30-2013 at 02:35 AM.
    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

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    Quote Originally Posted by Yuniko View Post
    Hey, kimono! How did you put an color on your path? I mean the dots on the path. :/ ?
    The dots or the "marching ants" means that you have made a selection. If you select your path and create a selection from it, you will see the dots.

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    Ohh, Sankyu. And by the way Can I ask? Why is it the background of my avatar is white? Even though I add the alpha channel on it. So hard to make it transparent. *uneasy*
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