Questions tagged [image-processing]
These challenges involve processing pre-existing image files, by altering them in some way, gathering statistics, or other image processing tasks.
133
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Rotate an Image
This challenge is simple: Take a path to an png image file as input and overwrite that file with a copy of itself rotated 90 degrees clockwise. You may assume that ...
- 5,700
3
votes
2
answers
537
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How Mondrian is your fine art collection? [closed]
For the purpose of this challenge a rectangular piece of ASCII art is Mondrian if it looks the same upside down.
What does "looks the same" mean?
A feature is any orthogonally connected ...
- 16.7k
8
votes
5
answers
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Random Pixels Image Compression
Challenge:
Given an integer \$n\$, guaranteed to be \$\geq2\$ and a power of 2, we are going to draw multiply boards either side-by-side or below one another, where the first has dimensions of \$n\$ ...
- 128k
3
votes
2
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Resize the image
Given an \$n\times m\$ matrix \$A\$ and two integers \$w,h\$, output a matrix of \$w\times h\$ called \$B\$, such that $$B_{i,j} = \int_{i-1}^i\mathbb dx\int_{j-1}^j A_{\left\lceil \frac xw\cdot n\...
- 25k
7
votes
2
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Temporally Dither an Image (Image to PWM Image)
Background
I want to display rich, vibrant images on my theoretical fancy custom display, but due to budget constraints, it displays everything in 3-bit colour! Whilst Regular Dithering would work, I ...
- 10.9k
14
votes
3
answers
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Recognize a Roboto Mono character
Your input will consist of an 18×18 image in any reasonable format, containing a horizontally and vertically centered 14px Roboto Mono character. This can be any of 94 printable ASCII characters (not ...
- 18.8k
12
votes
2
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Smallest image containing one of every RGB color
I'm not sure if this kind of golf is allowed, but here it is.
Your objective is to create an image containing one pixel of every possible RGB color. The image with the smallest file size wins.
Rules:
...
- 907
12
votes
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Toroidally magnify-blur a matrix
Task
Given a matrix of numbers \$M\$ with \$r\$ rows and \$c\$ columns, and the magnification factor \$n\$, build the matrix with \$rn\$ rows and \$cn\$ columns where the original elements are spaced ...
- 77.5k
19
votes
5
answers
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Generate Green Spray Paint Patterns
This challenge is about creating these neat "green spray paint" patterns: (more pictures below)
Loosely explained, they are generated by starting with a black image and a point in the center. ...
- 1,237
27
votes
5
answers
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Flag mashup generator
Part 2 of the challenge is here
Flags Mashup Bot is a small Twitter bot that generates a new flag based on two random flags and tweets the result every couple of minutes.
Task
Your task is to ...
- 3,879
4
votes
1
answer
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Draw these shapes
Given: a width, a height, and a set of sets of points. Output: An image where each set of points is connected and colored in (like a shape). Each shape must be a different color from all of the other ...
- 779
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vote
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(bit)Wise Images [closed]
Given a truth table and two images, use the truth table as a bitwise operation to the two images.
For example with the truth table:
1 0
1 0 0
0 1 0
(Note that ...
- 2,722
7
votes
1
answer
646
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Hilbertize an image
For a computer vision app I want to do a mapping of an image, in such a way that every pixel fit hilbert curve, instead of conventional layout. So task could be as follows:
Task description
Given ...
- 313
10
votes
0
answers
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Captcha Capture [closed]
Captchas aren't meant to be machine-readable, and that's terrible. It is time to end this obvious bout of unfounded hatred for machines just trying to let you know about great deals on ṗḧ@ṛḿ4ćëüẗ1ċäḷṡ ...
- 439
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Where's Blackhat?
Challenge
Write code which, given an image of a panel from a random xkcd comic, returns a truthy value if Blackhat is in the comic or falsey if not.
Who is Blackhat?
Blackhat is the unofficial name ...
- 23.4k