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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Difference Blend in PS different from that in Gimp

I've developed a workflow supporting diffuse/specular separation for isolating specular information from cross-polarized and co-polarized photography, this used in photogrammetry. I started this in ...
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1 answer
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Leica Q2M JPG files cannot be read by any of my Ubuntu (21.10) image software

I very recently picked up a Leica Q2M, and on my first attempt to read JPG files recorded on its storage media I've found that nothing on my Ubuntu 21.10 installation can read the files. I've tried ...
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How to fix underexposed flash-lit portrait in darktable (and perhaps also in gimp), leaving background dark?

Shot a portrait with flash + umbrella (indoors at night, some artifial ambient light) - but it's underexposed. In my first go at darktable I managed to properly expose the whole photo within 2 seconds ...
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1 answer
236 views

Combine Two Images and Make One Semi-Transparent / Opaque in The GIMP

I have two existing images that are identical in size and I would like to combine them, so that I can see a "faded" version of one image on top of the other. In other words, I want to make &...
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1 answer
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How to tile the same image repeatedly in Gimp?

How to tile a 1:1 image 3 times horizontally, side-by-side 1:3, without having to manually calculate and type in 3 times the width of the original as a new file? And without being constrained to ...
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1 answer
276 views

GIMP: How to apply the same processing to multiple photos

In Photoshop, the same sequence of processing on layers of each image in a batch can be applied to those multiple images by using File > Automate > Batch > Action then select the group of ...
2 votes
1 answer
483 views

How to edit more than 8 bits (10, 16 bits) of color in GIMP?

I've found out GIMP supports 16 bits color editing, e.g. here Can I use 10bit effectively today and if yes how?: Software support for editing in 16- and 32-bit color is good: Photoshop, before the CS ...
1 vote
2 answers
344 views

GIMP's color profile options on file opening and on export

GIMP's operations with color profiles seem hard to grasp. I've studied a question describing experience similar to mine here: GIMP. TIFF. Color profile sRGB IEC61966-2.1 and embedded color profile ...
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Colour shift in photographs between applications? (profile included)

I have Asus ProArt PA329 monitor. I made a full system reinstallation a few months ago, had not really worked photos for a while due to lockdown and other things etc. More recently, I re-installed the ...
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Remove Vignetting from thousands of images

I am doing historical research for which the only document source is microfilm typically created in the 1950s by technicians who did not understand the characteristics of this then new technology. ...
2 votes
1 answer
339 views

How to process 360 photos without creating seam?

I shoot 360 photos with a 360 camera that takes the entire scene with two wide-angle lenses that are stitched together to obtain 360 panoramas. I use Rawtherapee for post-processing and colour ...
2 votes
3 answers
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How do I create an infinite picture-in-picture effect?

I want to take a picture of an empty frame on a wall, then digitally edit that photo into itself infinite times. So the result should be a picture of a frame, which contains the same picture, which ...
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Remove sun glare using GIMP

How can the glare from the sun in the upper right part of this photo be removed using Gimp?
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Can you match color levels of semi-overlapping layers in GIMP using a single pixel color?

I am putting together fluorescent images taken on a microscope. I have taken sequential images that overlap for anywhere between 20 - 50 pixels at the edges. I have set up grids so that I have perfect ...
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How will the image be displayed/interpreted if I publish a JPEG online with no embedded color profile?

How will the image be displayed/interpreted if I publish a JPEG online with no embedded color profile? I use GIMP 2.10 on Windows 10 Home 64-bit.
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1 answer
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Is there a better way to "smooth out" CMYK halftones other than just blurring?

I'm trying to get the best possible scan of a CD cover (although this would apply to any print media using CMYK halftoning). With the highest setting on my scanner (3200dpi) I quickly run into the DPI ...
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Colorize orthochromatic print with Gimp

I've just started working with Gimp, and I would eventually like to try my hand at colorization. One photo I would like to do is of my father and mother from circa 1943. He is in his uniform, and his ...
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7 votes
2 answers
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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: ...
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Gimp insists on changing Epson SC-P800 black to photo black on plain paper

I'm trying to print an image on plain paper with an Epson SC-P800 printer using GIMP 2.10 on MacOS 10.14.6 (Mojave). I can find no setting in the print or page-setup dialogs to set which black ink is ...
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2k views

GIMP. TIFF. Color profile sRGB IEC61966-2.1 and embedded color profile GIMP - built-in sRGB

Friend gave me photos. TIFF with LZW compression. Parks, people walking, relaxing. People are doing fitness. I want to crop these TIFFs, resize. Then I will export it to JPEG. Then I will post these ...
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Problems creating a photo album: which is the expected size and resolution?

First of all, sorry for the basic question: I don't know much about photography and I want to create a photo album. I have already created some in the past using the software provided by the company ...
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Why does GIMP increase the size of exported JPEG files?

I'm using GIMP to edit some vacation pictures (JPEG files) taken with a rather old digital camera. Lacking a professional background, I just went about by trial and error and ended up adjusting the ...
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2 answers
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Do curves in GIMP have "targeted adjustments" like in Photoshop?

Is there a targeted adjustment feature in the curves settings of GIMP. To set colour curves. Like in Photoshop?
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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 ...
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1 answer
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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 ...
4 votes
2 answers
241 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 ...
2 votes
1 answer
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Crop multiple pieces from a photo and save with sequential numbers

I am looking for a way to draw multiple boxes around parts of an image at one time (sort of a ctrl+select) then save each box as a separate image. I usually use GIMP for photo editing, but any free ...
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2 votes
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How to imitate the blur on subject outlines after removal of background using GIMP?

Using GIMP I masked out an unwanted person who was situated in the background of my image. This person was partially concealed by my subject. I used the path tool to trace the outlines of my subject ...
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3 votes
1 answer
997 views

Workflow and colorspaces in Darktable and GIMP for printing images?

I have started to print out some of my photos, but this has lead me down a path where I do not know if I am doing things correctly, and are asked questions I do not know the answers to. Here goes: I ...
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1 vote
1 answer
282 views

Gimp perspective tool is not actually transforming

I've uploaded a screenshot below to illustrate the problem. I've dragged a jpeg into Gimp, clicked on the perspective tool, and then attempted to use it...but as you can see, it's not actually ...
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1 answer
128 views

Simpler way to selected photo from paper in gimp?

When I scan photos on my printer, sometimes it is a dumb printer and does not take out the background, especially when there is a lot of white. How would I do this on my example photo other than ...
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1 answer
297 views

Can I salvage overexposed images accidentally taken in manual mode?

I have a question. My wife used our camera and left the setting on Manual, which I didn't realize when I was going out to take pictures yesterday in the bright sun. We had some really great pictures, ...
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1 answer
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Bucket tool based on lower layer in GIMP [closed]

In GIMP, I want to use the bucket tool to fill in certain areas of my image, but I'd like to do it on an upper layer rather than directly on image. I think I need to tweak some of the layer settings ...
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GIMP Quality .jpg export - what is the best set up? [duplicate]

please could you tell what is the best common quality export value for .jpg image export in the GIMP? For example I set up the 100% for .jpg and for example for image 1,5 MB I will get the 5,2 MB or ...
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Is GIMP allow to add or change geo-tag localization in Exif data? Is there any plugin for that?

do you know is it possible to change or add geo-tag localization in Exif data of .JPG photos? Is there any plugin for that? I cannot find any clear answer is it possible from the graphical application ...
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1 vote
1 answer
871 views

How to set color levels (or white point level) on all layers of an image using gimp?

I have an image with multiple layers, and I have to set the same white point on all pf them. how can I do it without selecting each layer at once?
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4 answers
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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 ...
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1 answer
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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 ...
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633 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 ...
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2 answers
254 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.
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1 answer
283 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 ...
-1 votes
1 answer
391 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 ...
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1 answer
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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 ...
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1 answer
371 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
2 answers
4k 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.
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4 votes
4 answers
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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 ...
2 votes
1 answer
452 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 ...
5 votes
5 answers
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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. ...
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1 answer
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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 ...
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2 votes
4 answers
640 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 ...
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