Questions tagged [gimp]

GIMP (GNU Image Manipulation Program) is an open source, and freely distributed piece of software used for photo manipulation and retouching.

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67
votes
8answers
5k views

What are the key photography-related features from Photoshop that are missing in GIMP?

I am on a tight budget and chose to use GIMP for editing since it is free. What important photographic post-processing features am I missing from Photoshop?
44
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7answers
86k views

Does Photoshop have an equivalent to Gimp's “Color to Alpha”?

I have discovered Gimp's "Color to Alpha" feature, and man is it awesome! Basically, it will extract a particular color out of a selection and convert it to transparency. This gave me the ability to ...
29
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9answers
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How do I move my post-processing beyond Picasa?

Over time I've become fairly skilled in using Picasa to do post-processing starting with NEF files, but I'm thinking it's time to step it up a notch, and explore what I can do with a more ...
26
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5answers
17k views

Is there an equivalent to Adobe's “Vibrance” in Gimp?

See: What's the difference between saturation and vibrance in Lightroom? In a nutshell, Adobe's Vibrance is a "smart" color adjustment that increases saturation selectively, leaving skin tones ...
21
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13answers
3k views

What are the alternatives to Photoshop? Is Gimp a good option?

It seems that Photoshop is the dominant software in that space, however I am a hobbyist photographer and Photoshop is not cheap. Is there anything else that compares and that does not have such a high ...
18
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1answer
16k views

What is the easiest way to alter white balance in Gimp?

Let's say I've accidentally shot my pictures on "sunny" white balace when I should have used "shade". What is the easiest way to warm the pictures up a bit in Gimp? The "Colors/Color balance" tool ...
17
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4answers
29k views

Is there an “Exposure” setting In GIMP comparable to that in Photoshop's Image Adjustments?

In Photoshop, there is an Exposure feature in Image-Adjustments-Exposure which changes the image as if you actually changed the shutter speed on the camera. This effect is generally much more ...
16
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6answers
4k views

Is Adobe Photoshop worth the money?

I am starting to invest a little more money into my photography business. I've gone from a hobbyist to being asked to take professional shots, so I have the lights and other equipment. I'm upgrading ...
16
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5answers
21k views

How can I overlay two images exactly by scaling one of them in gimp?

I have two different pictures of the same object, one of which is taken from roughy the same angle but has a different scale and rotation. I want both images to overlap so that the upper one matches ...
15
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3answers
7k views

How can I remove the background of a photo using GIMP?

Sometimes it happens that I would like to extract a person from a photo and remove the background. How can I do it with GIMP? Every attempt that I made gave me very bad results. Can you give me some ...
14
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1answer
5k views

Can the effects of a polarizer be replicated in post-processing?

According to my knowledge Polarizing filters are mainly used to make sky appear more bluish in the day sunlight which gives more dramatic effect to your pictures. I don't have polarizing filters yet ,...
14
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5answers
22k views

How to best filter away high ISO noise in Gimp?

So I took a picture at a high ISO value in poor light conditions. I can't retake it, the grain effect is bad, I'm aware this will never be a good photo, but I still want to make the best out of it. So,...
14
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1answer
21k views

Are there GIMP plugins that allow one to view and edit EXIF data?

Does anyone know if there is a plugin available for the GIMP that will let you view and edit all the EXIF information associated with an image?
13
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2answers
4k views

How does the Curves tool work in GIMP?

I started using GIMP recently, and came across an option called Curves under the Colors menu. What does this tool do, and how do I use it correctly? I get some good colors if I make a graph in 'S' ...
13
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8answers
1k views

Reservations on making the move to Adobe Lightroom or Apple's Aperture

Background I'm a web developer (diploma) and computer scientist (degree), so I know a thing or two about computers and software. I just got into photography in Nov '10, but have been using Photoshop ...
13
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4answers
1k views

How to edit the exposure/contrast of two different areas of a photo with a smooth transition between the two parts?

I'm a complete newbee in photography and in photography editing, but I made a a photo I really like with my phone, and I would like to improve it numerically. Here is the photo. I know how to use ...
10
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2answers
3k views

Is there an easy way to select by histogram range in GIMP?

The other day I was wondering if there is an easy way in GIMP to choose the pixels that are part of a selected range on the histogram.
10
votes
3answers
12k views

How to fix chromatic aberration with free software?

Here is a zoomed-in example of an image I shot that has a bit of discoloration due to the chromatic aberration of the lens. What's the easiest way to fix this problem using only free software such ...
10
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1answer
3k views

If I assign a profile to my monitor in Gnome Color Manager, should I also enable that profile in Gimp?

I finally got around to using dispcalGUI to profile my monitor under Linux. Now, having assigned that profile system-wide using Gnome Color Manager (or the Xfce Color settings dialog), there's a ...
10
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5answers
41k views

Does Gimp have a Match Color function similar to that in Adobe Photoshop?

In a recent question, Steve Ross points out that Adobe Photoshop has a useful feature for matching color between photographs. Of course, color adjustment can be accomplished in Gimp with careful use ...
8
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2answers
29k views

How to create two layers in “Gimp” and merge them back into one?

How do you create two layers in "Gimp" and merge them? For example, I would like to load an image, create two identical layers, edit each layer in different ways, then merge them into one final ...
8
votes
2answers
26k views

How can I remove shine from skin caused by the light with GIMP

I have a photo made under portrait dish key light. And the model has a little shiny spot on her forehead. Several years ago I used Olympus Studio (if I'm not confused after so many time passed) and ...
7
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3answers
9k views

Double exposure photo with Gimp

Since I bought my first camera, I want to do a double exposure photo. I know double exposure photos are two combined photos, like the following one: (source: alexwisephotography.net) My goal is ...
7
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2answers
372 views

How to digitally remove reflections on vertical glass fronts?

As you can see, the reflections impair the visibility of the objects behind the glass quite a lot. This image is fairly old (2009), so that I can't revisit the site for a better shot. Software: ...
7
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1answer
413 views

How do I effectively split an outdoor image across an uneven horizon in Gimp?

I'm looking to take an image looking out at a storm in the distance that has a fairly uneven horizon due to trees and a foreground fence post and only increase the contrast and decrease the brightness ...
6
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2answers
582 views

Why won't GIMP 2.8 open my long exposure shots?

I'm unable to edit some of my tripod and shutter release shots in GIMP 2.8.10. It only seems to affect the photos taken in bulb (full manual shutter timing) mode, where I have exposure times anywhere ...
6
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1answer
1k views

How to achieve Japanese-painting like effect with Gimp?

In a recent blog post Trey Ratcliff shares the following picture: About the processing he says: To achieve it [...], you can duplicate the layer then do some extreme sharpening and a black and ...
6
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1answer
757 views

How to correct partial overpolarisation in sky?

I have this nice Lappland Autumn morning panorama, except the polariser effect is obviously too big just to the right of the small top on the right. I would like to try to apply a kind of mask with a ...
5
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5answers
2k views

A photo effect that favours yellow & blue; What is its name & how is it done with GIMP?

I have recently come across several pictures that seem to have been modified to favour or skew towards both yellow and blue tones. The photo editing effect creates a special, somewhat cosy ambiance. ...
5
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2answers
999 views

Gigapixel panorama problems

I took hundreds of pictures from a 75mm-300mm lens in Cristo Rei(Lisbon), but since Hugin (panorama tools GUI) canoot distinguish well water from... water(neither i) i took the river pictures with a ...
5
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2answers
1k views

What is this effect called and how can I post process my photos to get this effect?

I came across this image of an artist on a website. I was wondering what this type of effect on images was called and how I can post process my photos get this effect?
5
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1answer
9k views

GIMP Image Auto-Align Plug-In: I. just. do. not. get. it. Sorry! [duplicate]

Dammit Jim, I'm a photographer not a computer expert! I have tried to use GIMP's Auto-Image-Alignment plug-in and everything's there but I just do not get how it works! I have 100 pictures of our ...
5
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3answers
1k views

How do I use the “Standard Deviation” and “Scale” parameters in Gimp 2.10's GEGL-based unsharp mask?

Previously, Gimp 2.8 and earlier used a dialog with the familiar "radius, amount, threshold" parameters as described at Unsharp mask - what do the parameters do?, like this: But in Gimp 2.10, we ...
4
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4answers
8k views

Converting RAW images to lossless jpeg using GIMP?

I have a Raw image which I want to get printed. I need to upload this to a website which expects to be in jpeg format. I use GIMP for photo editing and used UFRaw to view RAW images. GIMP cannot ...
4
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4answers
10k views

How to calculate mean/average photo color in GIMP?

How to calculate mean/average photo color in GIMP? I have some photo and want to calculate average color - how can I do it?
4
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4answers
1k views

Local version of “White balance” in GIMP to clean up photo of document

I have a photograph of a document with black text on white background. The photo has a few problems: The text is a bit blurry. Overall there is noise even in the white areas. The background appears ...
4
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2answers
162 views

Remove low-frequency background

I have a series of images which are vignetted - an artefact which I want to reduce from the images (see the smoothed and down-sampled image). My approach is to subtract a heavily-smoothed version ...
4
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1answer
886 views

Photo Editing guide for gimp [closed]

Can I get some guidelines related to editing images with GIMP? Its not easy to learn it without any detailed guidance. How can I sharpen my gimping skills?
4
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1answer
1k views

How can I find the matrix that GIMP used?

I used a perspective transformation on an image in GIMP, but not before I forgot to record the transformation matrix it used. (I need to apply the same transformation to a bunch of other images.) I ...
4
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2answers
3k views

How do I create a split-tone effect using GIMP?

How do I create a split-tone effect in GIMP? Here is an example of the effect I am looking for.
3
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3answers
4k views

How to save JPEGs from GIMP 2.8 and higher?

At present I am learning GIMP 2.8 after getting the advice from this website to edit the photos captured by my Nokia N8. The problem is: I do not know how to save them in JPEG format in GIMP because ...
3
votes
1answer
2k views

Why doesn't my Gimp perspective transform apply to the entire image?

I'm trying to correct the perspective of a photo in GIMP, but I can't seem to get it to apply to the entire image. The transformation applies to a small area and leaves empty white space around it. I ...
3
votes
4answers
290 views

GIMP: Why can I set a higher quality than original image in the “Export Image as JPEG” dialog?

After having read the GIMP Export Image as JPEG section, I still have one understanding issue: Why am I able to select a higher quality value than the one from original image in the export dialog? For ...
3
votes
2answers
723 views

Post production for beginners [closed]

I am having a hard time finding information (books or websites) related to post production. I would like to understand how (and even when or why) we adjust brightness and colors, what could enhance a ...
3
votes
3answers
987 views

How to cut an irregular pattern with proper transparency?

This may be hard to describe and I'm not proficient enough to draw it yet so please bear with me. I'm cutting parts of some photos of me and my girlfriend to put on a board game I'm making for her. ...
3
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1answer
1k views

How do I copy selection from one color layer (let's say - Red) to another?

I'd like to clean up the whites of an eye. In Photoshop I used to select the white of an eye, and copy from Red to Blue and Green channels just by selecting the necessary color channel and clicking ...
3
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1answer
24k views

How can I do something like Photoshop's warp tool with open source software? [closed]

Using Photoshop, I can edit an image by using tthe lasso tool and warp tool. I need a open source solution that will operate in similar way. I tried Gimp software, but there is no warp tool in that. ...
3
votes
2answers
459 views

Restore colors from an infrared frame in Gimp

I have some frames of a security IR camera. The images are black and white. Is there any way to represent these images with colors. I use GIMP in Ubuntu operating system. Thank you!
3
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1answer
593 views

How to apply identical color curves to many pictures in GIMP?

I have a few thousand images that I want to apply the exact same color curve adjustment to. Is there a way to do this in GIMP? I found this How can I get a uniform white balance on a batch of JPEG ...
3
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2answers
3k views

How can I “paint-with-opacity” onto a layer in gimp [closed]

I have a layer that is at 50% opacity. But in certain regions, I want to use a paintbrush to bring the opacity higher. How can I do this?