Questions tagged [image-processing]

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3answers
48 views

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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1answer
65 views

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 ...
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1answer
88 views

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 ...
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2answers
72 views

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 -...
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1answer
116 views

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 ...
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2answers
130 views

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 ...
5
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1answer
316 views

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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2answers
87 views

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 ...
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2answers
120 views

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 ...
5
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3answers
9k views

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 ...
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1answer
1k views

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 ...
6
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2answers
703 views

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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3answers
1k views

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 ...
3
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1answer
312 views

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 ...
2
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2answers
241 views

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 ...
2
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1answer
1k views

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 ...
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1answer
705 views

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 ...
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1answer
433 views

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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1answer
49 views

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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1answer
8k views

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 ...
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2answers
1k views

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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0answers
42 views

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 ...
3
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1answer
837 views

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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2answers
268 views

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 ...
2
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2answers
1k views

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 ...
1
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1answer
2k views

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:
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0answers
34 views

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 ...
23
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5answers
49k views

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 ...