Questions tagged [image-processing]
The image-processing tag has no usage guidance.
39
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447
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How to achieve textured color gradients?
Some examples are below (source: https://www.etsy.com/shop/JazzberryBlue). How do I achieve gradients like this in Gimp? Or if not Gimp, what is the general process for creating gradients that blend ...
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1
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39
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How can I resize pixel art to keep black pixels
An older 90s mac paint program implemented a black-and-white image scaling algorithm that for lack of a more precise description, "preferred the black pixels" over the white. A consequence ...
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2
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What filter is used on this image?
Can you please tell me what kind of filter is used on this image? Was this photo taken in black and white and then pinkish? And what is the easiest way to do this? (considering any program, like ...
- 129
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Given a png monochrome line drawing, how to darken only lines that are a certain distance away from other lines?
I have a png image that I generated from a cad drawing using edge-detection. Only problem is all the lines have the same thickness. The lines that mark the main edges I need to be thicker and more ...
- 101
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665
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Photoshop: Image Processor and Batch not working with an action that work normally
here is the action
here is the batch
here is the image processor
Image Processor and Batch is not working with an action that work normally.
The batch just simply do the right actions, I can see ...
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-2
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2
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200
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How much more processing power does Adobe Photoshop use vs Gimp? [closed]
Gimp is not only free but is also lightweight and resources compared to Photoshop it feels like. Photoshop's long splash screen makes it feel resource heavy with alot of overhead. Is there technical ...
- 311
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1
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159
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How can I perform non-uniform rectification/straightening of a scanned image?
I have a scanned image (let's assume 300 DPI and grayscale). It's a scanned page, on which the printing was perhaps not perfectly straight to being with, plus the scanning itself may have introduced ...
- 350
3
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1
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1k
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Extracting multiple photos out of single JPEG
I had a lot of old printed photos. To quickly scan them, I scanned them four at a time like this:
(Above yellow color is actually a white color. I purposely put yellow color to distinguish from ...
- 131
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1
answer
76
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Gimp: Derive necessary editing process from difference between original and processed image
I have the original image (left image below) and have received the processed version (center image below) of that image. I don't know which processing steps have been applied on the original image to ...
- 113
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1
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102
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Can image processing produce image sequences to fake this specific 3D style?
This is more a question about what's possible with image processing and what not.
I wonder if it's technically possible to generate fake 3D sprites with sharp pixels by using only pixel information ...
- 113
2
votes
1
answer
402
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How to maintain lighting/shadows while making object transparent in GIMP?
Essentially I'm trying to make another background, beneath this image, become the colour of the object. The object/phone is red, the under-background is a linear gradient of colour and I'm trying to ...
- 23
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3
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68
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How to blacken line of a drawing without loosing quality?
I have to make black pen-drawn lines of a scanned picture totally black without loosing line's smooth and quality (unfortunately, printing image original in grayscale leads to loose of quality of ...
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1
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193
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How to simulate ink-on-paper texture/feeling in line diagrams I make
How can I turn crisp/clean diagrams I create on my computer, into diagrams that look like these:
Notice how the lines are "coarse", they look like ink which has been soaked into grainy paper, they ...
- 111
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1
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1k
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Ways to remove/select scanning artifacts from document [duplicate]
I often receive scanned documents that has dots and grains in them. I often use the paintbrush in gimp to manually remove them, but it occurs to me that all the dots share so many similarities that a ...
- 103
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2
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220
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Different images between MATLAB and ImageMagick
Hi,
I'm using ImageMagick 7.0.8-64 Q16 for Windows and MATLAB R2019. I'm doing the same operation (resizing with bicubic interpolation method) in both programs.
ImageMagick code:
magick start.png -...
1
vote
1
answer
2k
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Equalize resolution between two images
I have two images with different size and resolution. I need to do a cognitive experiment so is mandatory that different images are as much equal as possible. Is there any method to reduce the quality ...
1
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2
answers
162
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Organic glitching
I came across a couple of pictures and was wondering how they achieved such an effect.
I believe both pictures were originally still images from a film, then were processed digitally in some way ...
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1
answer
1k
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Adobe Illustrator: Can I Suspend Rendering of Complex Objects or Bypass the Progress Bar?
Towards the end of a project (or when revising an old one, or whatever), there comes a certain point sometimes, where multiple tools & effects have been used on several layers and any false move, ...
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2
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252
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Software for quickly and simply re-coloring and resizing a PNG image
Let's say I'm given an image of a flat colored icon, which is a 512x512 PNG black icon. Is there a software to quickly and simply generate e.g. a 36x36 (arbitrary) red (or any color) version of the ...
1
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2
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129
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What processes may have been used to create this image?
This is Drew Struzman's back cover to Sabbath Bloody Sabbath in 1973. I'm specifically asking about the use of blues and some alternative texturing in them (like in the head of the man on the left ...
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3
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13k
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Difference between Cropping, Scaling, Resizing & Changing Aspect Ration of an Image?
I am too confused in understanding different terms used with sizing of an image. What is the difference between:
Cropping an image
Resizing an image
Scaling an image
Changing Aspect-ratio of an image
...
- 53
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1
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2k
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Photoshop: How to use Image Processor function to save all files in main folder and all subfolders with lower quality?
I need to downsize a large amount of files. There is a main folder and in this folder there is also many subfolders. File types are jpg and png and they should be the same after saving them in lower ...
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2
answers
987
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How can moiré effects be diminished in clothing photographs?
I am almost ready to launch an e-commerce site for a client but some of the clothing images have a strong moiré that is quite disturbing:
I know I could blur the photos to get rid of the moiré but:
...
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3
answers
2k
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Is there a way to rename images based on their dominant color?
I have a folder full of PNG files made up of a single color... Here are a few of them to give an idea of what I'm trying to do:
I want the name of the files to be their hex color codes. It would be ...
- 1,774
3
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1
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408
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Extract similarities between bunch of image to remove stains on gimp or imagemagick
I didn't find clear answer on that:
I have some dots and stains on my lens. It's not so visible on some pictures but when I take shot at sky or something bright, the image is spoiled by stain and ...
- 31
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2
answers
446
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Mathematical approach to color schemes
I am trying to implement a program that will classify the color scheme of the image based on the dominant colors. Example:
I am using machine learning tools but I wonder whether there is a ...
- 233
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1
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1k
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How to create lookup color table image from .atn
How can I create an image lookup table (LUT) using an .atn file? I wish to create a custom Lookup filter using GPUImage similar to the AmatorkaFilter
A photo filter based on a Photoshop action by ...
- 123
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1
answer
1k
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GIMP editor, how to set selection and trim image for production?
Using GIMP editor for Microsoft Windows. I have scanned an image and need to prepare the file for printing and the print file size/dimensions should be 88.5 x 57 mm: How can I set a rectangular ...
- 113
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What is the difference between "Save" and "Done" in Camera Raw?
I processed some JPGs in Camera Raw and clicked the Done button. The changes seem to have been saved, as I can see in the thumbnail in Adobe Bridge.
Then I have placed the image in an InDesign file, ...
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104
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To Find Colors Different in Two Images? [duplicate]
I want to find the color group of blue removed from Image 2 compared to Image 1.
Image 1 and Image 2
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1
answer
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I have 80 small photos of color samples, how can I sort and arrange them by color?
So I've searched the internet/google up and down for at least 3 hours and still haven't found anything that works:
I have those small .png files that are photographed color samples of products and I ...
-1
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2
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2k
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How do you join many PNG images adjacently in Photoshop CS6
I'm new to photoshop and this commmunity. I have 25 images in PNG format, grayscale, 2100 x 2100 pixels and ~50 KB in size.
Is there a way to merge the images consecutively in a single PNG file ...
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0
answers
50
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how to get results of the node setup in gimp?
Here is a very easy node setup in blender:
suppose if we want to see the results in gimp with the subtract mode set on the wave texture we get a result such as this:
the results are quite different ...
- 193
3
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1
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960
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Different dominant color codes are extracted from same image
I try to extract the dominant color from a image by using 3 different tools, i.e.:
Tineye Labs
Color Theif: http://lokeshdhakar.com/projects/color-thief/
Vibrant.js: http://jariz.github.io/vibrant.js/...
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2
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291
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To resize image without recompression?
Got this jpeg image that has incorrect proportions. That's how it should look but here's the thing - by simple means of resizing and recompressing it to jpeg, after conversion the size gets bigger and ...
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2
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2
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1k
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Adding blurred border to image using GraphicsMagick
How can I add a border of 100px to all sides of a jpg that is made up of the perimeter pixels stretched out and blurred? e.g. the border to the left of the image is just columns 1-3 stretched ...
- 121
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1
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What is color value (white light) reflecting, and how do I achieve it?
I actually made up this solarization effect, but it's based off a simple algorithm I hadn't seen before. The answer below explains how to get it:
- 131
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36
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Make grid from images [duplicate]
I have N images in foldes with the same dimensions (HxW).
Is there any software that can resize all images to the configured size (for example proportionally reduce size of the pic by X) and build a ...
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26
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6
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62k
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Is there a command-line program that can convert an image to an ASCII art image?
Is there a command-line program (for Linux) that can convert an image to ascii art and then save that output as an image e.g. jpg or png?
To illustrate what I'm in need of, I want to convert the ...
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