Questions about GIMP, the GNU Image Manipulation Program. It is a freely distributed piece of software for such tasks as photo retouching, image composition and image authoring. Ask scripting questions on Stack Overflow, software support questions on Super User, and anything related to design here ...

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2
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1answer
6k views

How to fade two images together in Gimp

I have two pictures of irregular shape with transparent background and a background image. How can I join these two pictures to make them fade with each other, but not with the background image?
2
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2answers
1k views

Remove transparency in bulk - GIMP

I have 3,337 PNG images which all have a transparent background. First of all, I don't know how to remove transparency... Second of all, I want to do this with all 3,337 images at the same time. I ...
1
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4answers
262 views

How can I select a single color within an image?

How would one pick or select all of a single color within Photoshop, Paint.NET, or The Gimp? The objective is to edit everything with that color afterwards, such as by brushing over it with another ...
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3answers
178 views

Set transparency of wood print [duplicate]

I am trying to make initials found in old books transparent. E.g. The paper should be completely transparent and the dark parts of the print fully opaque. But the parts of the print that are not ...
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1answer
518 views

How to open a file the fast way in Gimp?

The classical way to open a file is not followed in Gimp. There is no browse button, nor there is a textbox where one can paste the path to the file. I do not edit images everyday and I always have to ...
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3answers
631 views

How can I multiply pixel values by a constant in Gimp?

In Gimp, how can I multiply the value of every pixel in a grayscale image by a constant value? For example, multiply each pixel by 2.
1
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1answer
86 views

Gimp make top half of photo lighter, and bottom half darker

I have a need to show things more dark or "dreary" at the bottom part/half of the stairway, and more light at the top. At the top I don't care about the stair colors so much, I want the sun to be ...
1
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1answer
66 views

How to bisect a selection with GIMP?

How can I cut a rectangular selection exactly in half, so that a 128-pixel long selection becomes 64 pixels long? I have this: I want to select just the top half of this box (so I can bucket fill ...
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2answers
2k views

GIMP: Smooth png image from black to transparent (how to make gradient)?

How to make a transparent 'png' image from black (not transparent) to nothing (absolutely transparent) in GIMP smoothly? As result, this image on the red image gives the image from black via dark red ...
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2answers
624 views

How to draw a solid line, that fades out to one side in GIMP?

How would you draw something like that blue border above, where there's a solid line that fades out to total transparency on one side, in GIMP?
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2answers
3k views

Use GIMP to extract out the logo from background

I would like to extract out the icon in the following screen (mixed with gray background) to Anyone know how I can do that using GIMP? Thanks.
1
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1answer
46 views

Automatically scaled opacity for multi-layered images

I have several set of images with a fixed background and an object moving in the foreground. I'd like to get an idea of the motion of the object by superimposing images with scaled opacity. If I load ...
1
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2answers
2k views

Open source software to reduce colours to custom optimised palette (quantize) (for paint-by-numbers)

I want to manipulate a photo so that the number of colours is reduced significantly (to say 15-50 colours which I would specify the number). I would like those colours to be automatically optimised ...
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2answers
3k views

Using GIMP to redraw an existing low res logo

I am just getting my teeth into Gimp and am not a graphic designer by any stretch of the imagination! I'm a developer trying to make myself a bit more useful on the design front. Anyway, I am ...
1
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2answers
2k views

How can I create a color-separated PDF in GIMP?

Using GIMP I would like to create a color-separated PDF. I plan on making printing plates for a home letterpress and they request a color-separated PDF, which seems to just be a page for each color ...
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2answers
133 views

Scale down an image in GIMP without losing resolution

How do I scale down an image to a smaller size in GIMP without an unnecessary loss of resolution? I know that I am losing too much image resolution because when I downscale the same image using HTML ...
1
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2answers
209 views

How to make a “barrel” shape from a flat image (?) [closed]

If you have a flat image ie logo you want glue onto a cylindrical "package" to show final product -- what free s/w package (or script) do you use? (I use inkscape and gimp to create flat art with no ...
1
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1answer
174 views

How can I recreate this effect in GIMP? Blue/white color conversion

Here is the image: The best way I can describe it is converting the image to a black/white scale (heavy white) and making all instances of black==blue.That was how I approached it when trying to ...
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2answers
80 views

How can I make the alpha in a layer proportional to the darkness?

I have a layer that I want to merge and I want the dark colors in the layer to have more weight. How can I make it so that black pixels are 100% opacity, white pixels are 0%, and #7F7F7F pixels are ...
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3answers
598 views

Convert .psd into .png without loosing shading and lightening

So I do not own Photoshop, but got a .psd file from my client to work with. I managed to use a online converter and get this .png out of it. What I additionally need though is the conversion of ...
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1answer
175 views

How to export overlay glow

i made the following image: lowest layer: solid black middle layer: some white brush painting highest layer: solid red with Overlay mode this gives me a nice glowing effect, which i would like to ...
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2answers
355 views

How can I do a global fuzzy select in GIMP?

How can I make the fuzzy select global in GIMP, so that it selects all of a certain color and not just contiguous regions? For example, if I drew multiple red squiggles, how could I easily select ...
1
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1answer
5k views

brightness-contrast does not operate on indexed layers

I want to darken a PNG image in GIMP. I open it and choose Colors | Brightness-Contrast. The application responds with the error message - "brightness-contrast does not operate on indexed layers". ...
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3answers
2k views

Change Color Of A Monotone Icon To Another Color

Basically, I'm a programmer and I'm pretty new to graphics design, and I don't have much knowledge of the keywords used by the graphic design community. That's why I'm facing problem in googling this ...
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2answers
2k views

Gimp : difference between crop and canvas size

I would like to know the difference between the crop tool and changing canvas size. If I reduce the size of the canvas, a yellow dashed line stays around the previous size. On the other hand, when I ...
1
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1answer
3k views

In GIMP how to scale up image without scaling layers?

I am trying to scale images without scaling layers. I tackled the problem of scaling down the images by selecting the largest visible layer and the cropping the image to that layer. This way none of ...
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2answers
5k views

Gimp: Copy layer 1 to layer 2's mask

Pretty straight forward question, say in Gimp I have an image with 2 layers in question, one is temporary, I want to use it as the mask for the other. How can I transfer a layer into the mask of ...
1
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1answer
139 views

How to add brushes on gimp

I am a new user of Ubuntu, and to be honest completly new to the whole linux scene. I'm looking to add more brushes to my GIMP program, but I don't know how.
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1answer
132k views

Changing the background of the picture to white

I have a passport picture in which the background is light brown. I need to change that background to white. Is there anyway I can do that using Inkscape or any free tools? Here is the picture: ...
1
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1answer
261 views

Simple way to create this 3-D pixel effect in GIMP?

It's the sad, pixelated little icon that appears when Google Chrome doesn't shut down correctly. Given a, say, off white on dark gray pixel image to use in a design, how would I get the edges of ...
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3answers
993 views

How to create multiple buttons in bulk with Gimp?

I'm trying to create a "set" of buttons. Actually I can make the buttons somewhat easily. In GIMP I have a template (It's a rectangle… soooo complicated). Take template, add text to text box for ...
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4answers
6k views

Convert icon to a transparent png

I have a set of icons that I resized to 30x30. Now I want to use them for my iPhone TabBar as specified here: http://www.idev101.com/code/User_Interface/sizes.html How can I make these transparent ...
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2answers
30 views

How can I “un-activate” the active layer in GIMP?

I like to use GIMP with the show layer boundary setting on so that when I'm working with a layer a dashed border appears around it. However, once I am finished working with the layer - and I'd ...
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2answers
59 views

how to display current colour values of pixel under cursor in gimp?

Is there a way to display the colour values of a pixel currently under the cursor? I've seen that in different other software. Why do I need that? I have to clone textured areas in a picture. But ...
1
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1answer
99 views

How to make a watermark like this? [closed]

If possible I want to make it in paint.net/gimp because I don't have access to PS. I have tried a few programs for massive watemarking but none of them had the option for the text to look like that. ...
1
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2answers
864 views

How do I draw horizontal/vertical straight line in GIMP?

you can consider me new to GIMP. I've tried by holding Shift key, can draw straight line but I want a straight horizontal/vertical line. So, How can I draw straight vertical/horizontal line?
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2answers
589 views

How to achieve this cartoon effect in GIMP?

Cartoon filter doesn't make it. Desired effect examples: Image 1 source: http://stackoverflow.com/a/1357489/1165509 Image 2 source: http://stackoverflow.com/a/1357751/1165509 Can you describe ...
1
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1answer
64 views

Rotate view in GIMP

Is there a rotate view tool in GIMP? I am not looking for a transformation tool, I want to rotate the document to make overwise uncomfortable strokes with a drawing tablet more natural. If not, what ...
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2answers
120 views

Mapping all colors (except background) to a single color in GIMP

I have a spotty image. The image has maroon and black spots (with gradient) on a white background. I would like to convert every color (except white) to green color using GIMP.
1
vote
2answers
390 views

Disable floating layer mechanism in GIMP

GIMP applies a floating layer whenever I paste content into a document. Unlike Photoshop, this requires me to create a new layer each time which is an annoyingly contrived and confusing process. How ...
1
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1answer
507 views

Gimp export layer mask as png

As the title says, how can I export only the layer mask? I want to do this because I need to use it in another program.
1
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1answer
75 views

Gimp - fast switching to eraser

I've been searching for this but all I find are annoying tutorials on how to click the eraser button. Whenever I switch to the eraser it keeps the tool size I was using for the pencil, I'd really ...
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2answers
336 views

How to convert GIMP gradient to Photoshop compatible Gradient?

I want to convert GIMP Gradient to Photoshop compatible gradient (importable)
1
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1answer
897 views

Compress png images with Gimp

I'm getting a message from PageSpeed Insights that recommends to compress some png images. E.g: If compressing .../logo.png without loosing information, you would save 1.014 B (12% redcuction). ...
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2answers
259 views

What is this effect called? Is it film-grain?

What is this effect called? Is it film-grain? It kind of looks like but the grains are bigger. Thanks a lot in advance.
1
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1answer
390 views

Seamless UV Texture - GIMP

I'm creating a model of a road to use in Unity. The edges need to be able to tile so I can link multiple parts together. I made a UV map and edited it in Gimp. I used the seamless filter in gimp to ...
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1answer
709 views

Keeping colors on an image while setting full transparency

I would like to create an image from a map, where each country is colored in a different color, where the frontiers are in black, and in which each color except black is fully transparent, while not ...
1
vote
1answer
786 views

Splitting an image into many randoms pieces

I have an image of a map of a certain region, and I want to show the map divided to about 1000 small pieces. This should be a metaphor of dividing the region to many small land-plots. I need two ...
1
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1answer
4k views

How can I set opacity for an image in GIMP 2.6.x?

I've searched and found advice to use a GIMP layers dialogue in e.g. How do you get transparent colour on Gimp? However, in my version of GIMP (2.6.8 for Mac), Layers doesn't seem to be set up to ...
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2answers
288 views

Blending a drop shadow seamlessly

I need to apply shadow to an overarching border, however so far I've created the shadow with CSS, and since the overarching border is formed by two boxes, the shadow overlaps. My solution to this is ...