Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [gimp]

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

2
votes
4answers
175 views

What technical terms or rules of thumb do I need to understand for a black and white conversion of a photo? [duplicate]

Below is a photo taken by me: Below is a photo I found on internet: There are some visible differences between the two. One is dull and the other has visible blacks and whites. I feel I need to ...
0
votes
1answer
102 views

How do you make those tunnel view pictures [closed]

I've made the tiny planet altered perspective shots with Hugin on Linux. The reverse of that, may be the tunnel view perspective. Any guides/tips on howto create those? Probably have to start with a ...
0
votes
1answer
53 views

Seeing the difference/losing information when comparing different formats

You can hear the resulting loss of sound information when you invert an mp3 in an audio tool and mix and render it together with the wav format. You can now hear the difference between the mp3 and the ...
1
vote
2answers
144 views

Wrong in-camera auto white balance issue

I own a Sony DSC-H55 point and shoot camera. It has a 14 MP CCD sensor with 10x optical zoom. I am happy with the overall image quality. The in camera auto-white balance is producing wrong color ...
-2
votes
2answers
125 views

time-lapse photograh

when i have a sequence of individual pictures, how can I create a single frame like this? My tools are GIMP and/or Darktable. Kindly help.
2
votes
1answer
89 views

Making selections by value threshold in gimp 2.9

Does anyone know how to make a selection by value in GIMP 2.9? I'm trying to "cut out" saturated stars (values of 64k) in an astrophotograph. "Select By Color" should be able to do it, but the ...
-2
votes
1answer
181 views

Adding Exif data to a tif increases the file size

I have some jpg images exported from RAW files using UFRaw and they are very large in size(>15MB). So, in order to save space, I opened them in GIMP and re-exported as tif images with JPEG compression ...
1
vote
1answer
230 views

Gimp or ImageMagick: Adjustable kind of equalize?

Sometimes, I shoot pictures that are badly lighted (e.g. very dark areas, while part of the picture is well exposed). In some instances, equalizing the pixels can do real wonders. But is there also ...
-1
votes
1answer
155 views

Issue with color profiles in grayscale images (compared to GIMP)

X-Post https://www.reddit.com/r/photoshop/comments/5v4zid/issue_with_color_profiles_in_grayscale_images/ (slightly edited) Hi everybody! I hope the language barrier will not be noticed (feel free to ...
4
votes
2answers
1k 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.
5
votes
4answers
416 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 ...
0
votes
1answer
401 views

How to create minimalistic avatar or a vector avatar of a photo using linux platform or Android phone? [closed]

Is there any way we can make a minimalistic cartoon avatar of our photo using softwares available for linux. On Windows it can be created using photoshop. But i don't know how to create the same using ...
3
votes
1answer
330 views

Haze effect in moon photo? (using GIMP)

I used two photos of the recent supermoon and combined them. The result is OK (link below). I was unable to achieve a look I wanted, where haze causes darker areas of the moon surface to assume the ...
7
votes
5answers
1k 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. ...
1
vote
0answers
119 views

What does 1px by 1px gaussian blurring mean in GIMP? [closed]

So I was going through the options in Gaussian blur that are provided in GIMP, one of which is the ability to select the "Blur Radius". From my understanding, the Gaussian filter is created by ...
0
votes
1answer
122 views

Filtering narrow spectral lines in digital postprocessing

I am trying to reduce the impact of sodium vapour lighting on starscape-type images. This type of street lighting exhibits a very narrow orange spectral line, and it is common amongst ...
2
votes
4answers
299 views

What sort of post-processing can improve this washed out image?

The original image [ISO => 400, F11, 1/320 seconds, -1/3 EV] looks washed out, may be because of bright day light overhead. In GIMP, if I apply Tools => Color Tools => Levels => Auto, the picture ...
3
votes
1answer
889 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 ...
1
vote
1answer
168 views

Remove “random” noise [closed]

I have a picture which was taken from a book and it's full of noise: I tried to remove the noise manually but it is too difficult and takes a lot of time. I noticed some webpages who attempt to treat ...
1
vote
2answers
481 views

.NEF Raw files open in Black and White

I recently went flying with a friend and took my Nikon D3300 DSLR up with me to get some aerial shots. As I'm still learning I set the camera to RAW+JPEG so I had some pics and could also have a mess ...
1
vote
1answer
410 views

Warp-sharp script not working in Gimp 2.8

I have been scanning film and I just got sick of the Unsharp mask setting of my scanner software (EPSON Scan). It just makes the grain look huge and unnatural, resulting in weird contrast on most ...
0
votes
2answers
217 views

Why do exported image contain colored grains/noise when viewed in GNOME Image Viewer?

I was editing a JPG image taken by Nikon D5300, a mid-range DSLR. Original picture was somewhat washed out. After some color-correction, I exported the image both in JPG and PNG format. Original JPG: ...
0
votes
0answers
82 views

Why isn't GIMP as popular? [duplicate]

I have used GIMP on many occasions with excellent results. What I do not get is, why isn't it as popular as some of the commercial software? What advantages do these expensive software provide that ...
2
votes
1answer
660 views

Expand Canvas and Extend Edges of Image to Fill It

Hopefully this is the right place to ask this type of question. I am editing a digital photo (in gimp), and need to increase canvas size slightly. At one point, I was watching a tutorial where they ...
1
vote
1answer
2k views

How can I remove the grid lines during transformation in GIMP?

I'm trying to change the perspective of a layer in GIMP, but it's very difficult to see what I'm doing while there's this enormous grid over the selection. Is there any way I can disable this? Here's ...
5
votes
1answer
5k 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: google photos http://cdn1....
5
votes
3answers
685 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 ...
2
votes
2answers
406 views

How can I correct high-altitude photos taken without a UV filter?

I took a string of photos, without a UV filter, at an altitude of 2.500m/8.200ft and they all look 'odd', flat, washed out. In the GIMP Color > Levels Tool the Input Levels the histogram for the red ...
2
votes
0answers
71 views

Transform two identical Images with different background color into one without any background color [closed]

How can I transform two identical Images with a different background color into one without any background color? Like this: to
4
votes
1answer
5k 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 ...
1
vote
1answer
63 views

How select a layer in gimp [closed]

I use gimp after photoshop. In a photoshop: I clicked on layer by mouse button with "ctrl" in a layer's list. It way allow select fill of this layer. How make it with help of gimp? For example, I draw ...
1
vote
2answers
966 views

How to convert a dull monochrome photograph into a sharp black and white photograph with great contrast? [closed]

I shot the following photo with Nikon D3100 + Nikkor 50mm 1.8f G. I shot this with the Monochrome option of the camera. I use Gimp for post processing. I sharpened this with the Unsharpen Mask ...
3
votes
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 ...
6
votes
1answer
518 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 ...
2
votes
2answers
1k views

How do I reset Ufraw to default settings in Windows?

The first time I played around with Ufraw / Gimp on my Windows machine, I hit "save" in Ufraw. Now, it opens every new photo with the odd warm settings I was playing with. How do I reset Ufraw to ...
1
vote
1answer
388 views

Is it possible to control sliders of darktable from tablet?

I have a 10" android tablet and 15" laptop. Darktable and GIMP is installed on my linux laptop. Controlling sliders/curves etc of darktable /GIMP from mouse is not efficient, for me at least. I see ...
10
votes
3answers
8k 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 ...
1
vote
1answer
301 views

Getting UFRAW into GIMP 2.8.14 on Yosemite

Folks claim that the versions of GIMP downloadable from http://gimp.lisanet.de/Website/Support.html have UFRAW in place. I just downloaded 2.8.14, and I see no sign of it. It's not listed in the ...
1
vote
4answers
7k 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?
2
votes
2answers
278 views

Problem in white balancing photographs taken in sun

When a photograph is taken in sun, the whole photograph becomes slightly orange in color. Specially the skin tones become too orange. The photographs are taken from simple mobile phone high megapixel ...
1
vote
1answer
352 views

Dramatic differences between UFRaw, GIMP, and JPG displays

I recently downloaded GIMP and I am having a slight issue. When I import a RAW image into GIMP, tinker with it (using the UFRaw plug-in), and then press OK, the displayed image (in the GIMP preview) ...
6
votes
2answers
564 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 ...
3
votes
1answer
213 views

How to get Ufraw to pass on EXIF data to Gimp

I cannot find EXIF data in Gimp using Ufraw as standalone OR plug in, even though I use the option save EXIF data - what could I be doing wrong?
1
vote
1answer
240 views

Raw is larger and softer than JPG

Here is a JPG image (unprocessed) followed by the corresponding DNG that I post-processed in Photivo/GIMP. (Canon Powershot SD750) Flip between the two images in Chrome. Why is the raw image slightly ...
1
vote
1answer
377 views

Why do we even need RAW-specific editing software?

I was wondering the other day, why do we even need software like Lightroom, Adobe Camera Raw or Darktable? Their purpose is solely to retouch image in a most general manner (major tint/temperature, ...
0
votes
1answer
816 views

Gimp GEGL Tutorial for Photographers?

Is there a good tutorial for GIMP 2.8 software, that explains, comprehensively, how to use the GEGL operations (which have the the advantage of being nondestructive) for photo images? When I look ...
3
votes
2answers
664 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 ...
0
votes
1answer
623 views

Gimp's color options not working

I'm trying to edit the color balance of a layer in a .xcf image, and none of the color commands do anything. For example, I can crank saturation and value to 0 in Hue-Saturation, or invert values, and ...
3
votes
1answer
701 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 ...
4
votes
1answer
794 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?