Questions tagged [image-processing]
The image-processing tag has no usage guidance.
183
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363
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How to get information about an image (picture) from the Linux command-line?
I'm working on a web app and currently migrating some stuff from an old app, but I hate that I have to open an image editor to get some info about images I'm migrating. Things like image dimensions.
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261
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2
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Vertically stack multiple images using ImageMagick
I would like to combine multiple images into one image using ImageMagick. To explain a little better, I want the result to look similar to this:
That is, I have a number of screenshots, and I want to ...
- 2,721
157
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14
answers
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How to prove the authenticity of a screenshot?
I have take some screenshots of chat from Whatsapp web using Windows 8 Snipping Tool. I saved those images in PNG format.
Now I want to prove that those images are the original, not tampered or ...
- 1,521
118
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3
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Using GIMP, what is the easiest way to repeat an image in a tiled fashion?
I have an image that is 100×125 pixels in size.
I'd like to create a new image by repeating the source image, five times, horizontally (so the new image is 500×125px).
The repetitions must be pixel ...
- 2,242
81
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16
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How can I combine 30,000 images into a timelapse movie?
I have taken 30,000 still images that I want to combine into a timelapse movie. I have tried QuickTime Pro, TimeLapse 3, and Windows Movie Maker, but with such a huge amount of images, each of the ...
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4
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How to crop an image using ImageMagick from the command line?
I am trying to crop a 640x640 image using ImageMagick on the command line.
I need to remove about 20 pixels from the bottom part of the image all the way from left to right. A long strip along the ...
user2041357
58
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5
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I want to change DPI with ImageMagick without changing the actual byte-size of the image data
In GIMP there is a very simple way to do what I want. I only have the German dialog installed but I’ll try to translate it. I’m talking about going to Picture -> PrintingSize and then adjusting the ...
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Is there a generic mime-type for all image files?
I know that I can use the specific mime-types as listed for example here, or a generic mime-type for any file like application/octet-stream, but is there a generic mime-type for all image files?
(I ...
user162573
35
votes
9
answers
69k
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Photoshop: Trim a photo so it contains no transparent pixels?
In Photoshop, I've put together some panorama photos using the Photomerge tool, and the resulting image contains a lot of transparent pixels. Also, because it's assembled from multiple photos, the ...
- 2,290
33
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10
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How to print documents to pictures (gif, bmp etc.) on windows
What is the easiest way to capture the printout of a document in a picture (i.e. GIF, BMP etc.)? Making a screenshot does not help, since the printout is different and larger than the screen. Is there ...
- 2,259
14
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7
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What is the best method to remove duplicate image files from your computer?
I have a lot of duplicate image files on my Windows computer, in different subfolders and with different file names.
What Python script or freeware program would you recommend for removing the ...
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11
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4
answers
37k
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How to get a good clean newspaper scan?
I tried a few times to scan newspaper articles, but the images I got were always blotchy and with bad colors, sort of like this:
Sometimes I see some really good scans, like this:
What is the trick ...
- 1,780
10
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4
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How to resize an animated webp？
I want to be able to change the size of a dynamic webp.
Sample picture. I found this website to do just that.
So how can I implement something similar in my own program?
I tried using ImageMagick7 or ...
- 113
10
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7
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Detecting blank image files
I am using scanimage with a document scanner (Canon DR-2510C) that supports duplex scanning. Unfortunately, its SANE driver does not support blank page detection, so that with mixed pages (single/...
9
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2
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Auto-crop black margins dynamically of scanned images?
I have a notebook photocopied and the photocopy scanned, about 200 pages.
For various reasons I need to print this material. There are large amounts of black areas at the sides of the page (after the ...
- 6,426