Questions tagged [image-processing]
The image-processing tag has no usage guidance.
56
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Gifsicle: How to set it to not overwrite the original GIF file if the resulting modified GIF file is larger than the original?
About Gifsicle:
Gifsicle is a command-line tool for creating, editing, and getting information about GIF images and animations.
One of its features is (from its website):
Optimize your ...
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3
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Tesseract: OCR hex and binary strings from old documents
I have some questions about Tesseract
Context
I am currently working on an old cryptographic algorithm from East Germany (GDR) which was developed in the 80s. I implemented the algorithm in C#. Now ...
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Feather edge of image in with ImageMagick in 1 step (existing solution in 3 steps)
I am trying to add a feathered edge to a JPG such that it fades to black at the edge of the image. I was able to achieve this in three steps, but have been struggling to combine it into one step.
...
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2
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1
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Software to aid using camera as a scanner
I want to digitize some index cards with my camera. I'm looking for a program that would automatically fix geometry on the shots (as you would expect the cards come tilted on the picture).
I have an ...
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Color rotation/correction help request for GIMP
I'm new to GIMP and am looking for help on color rotation. Some target colors don't always seem to be accessible, or I don't understand how to get to it.
For example:
Here I can rotate the color from ...
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avoid duplicate frames in ffmpeg
I have a video.mp4 which I need to convert losslessly into a sequence of images.
I used
ffmpeg -i input.mp4 $filename%05d.tiff
but I get a lot (thousands) of duplicated frames. What are they? is it ...
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Extracting text from animated GIF file
I have a GIF file that shows a scrolling down through a table. That table has data that I need to extract. Here is how the file looks like,
BTW, I have video files that show the same. With extensions ...
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GIMP/Imagemagick: Breaking single images into multiple images
I have pulled the image files from this Gregg Shorthand resource site with the intent of using the shorthand figures in Anki flashcards to complement my study of the system. You will note that the ...
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Desktop Background Scaling and RAM usage
I've been setting my wallpaper on all my computers to just a single pixel image, in order to conserve RAM for more important uses. But I wonder if, in the process of the OS scaling the image to screen ...
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Is it possible to optimise and resize an image with mozjpeg?
I want to be able to compress and resize and image with mozjpeg's cjpeg command
However according to the usage file it does not seem like cjpeg can do both in one single command.
Is it right?
If ...
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Is it possible to render and/or recover half of an apparently damaged PNG file?
I have a chunk of a PNG file, missing its end. An unknown amount of data from the IDAT chunk is missing, as well as the IEND chunk. I've inspected the IHDR and it looks completely fine, correctly ...
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avconv / ffmpeg covert images to video skips frames when frame type changes
I have an instance of ffmpeg that captures one fps from our home CCTV cameras. At the end of the day I have an ffmpeg script that takes those images and turns them into a video. This is fine with one ...
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48
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Looking for a program that can monitor and downscale images
I have a Windows 2012 webserver to which users upload images, and at that point i dont have any control over file size or images size. But, sometimes they do upload way too big images. These images ...
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Is there a simple image tool on mac to read alpha value of a pixel?
I am looking for a simple tool that will let me read the RGB and alpha (A) values of a pixel in an image.
Something like DigitalColor meter but that returns alpha values.
I know this is possible in ...
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1
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1
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341
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How to extract image rotation from a PDF
I'm extracting all the images from a bunch of scanned PDFs using pdfimages, in order to process and repackage them.
The problem is that some images are rotated 90° (either CW or CCW) and others are ...
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