Create a program which can rearrange pixels in image so it can't be recognized. However your program should able to convert it back to original image. You can write two functions - for encoding and ...
Imagine a continuous 2-dimensional path that can only turn left, right, or go straight, cannot intersect itself, and must fill a rectangular grid such as the grid of pixels in an image. We'll call ...
I've compiled a mosaic of 2025 headshots from the avatars of the top Stack Overflow users. (Click the image to view it full-size.) Your task is to write an algorithm that will create an accurate ...
You are given two true color images, the Source and the Palette. They do not necessarily have the same dimensions but it is guaranteed that their areas are the same, i.e. they have the same number of ...
Dither a grayscale image into pure black and white with your own algorithm. Guidelines: You must come up with your own new algorithm. You cannot use pre-existing algorithms (ex. Floyd-Steinburg) but ...
As any amateur photographer can tell you, extreme post-processing is always good. One such technique is called "miniature-faking". The object is to make an image look like a photograph of a ...
You are a secret agent trying to communicate with your fatherland. Of course the information needs to be hidden so no one eaves drops your message. What would be better suited than a cat? Everyone ...
Code golf: Print an image of the source code. Requirements Must output the image of the source code itself, not a version stored elsewhere and retrieved at run time. Code must be legible enough ...
Challenge Recognize ASCII art numbers. To make things interesting, three random points in the image might be flipped. For example: ***** * ** ** ** ** ** Input A 7x7 ...
Over on http://meta.stackoverflow.com, we have a few memes of our own. One of them is Freehand Red Circles. See this post: So, the challenge is, can you draw freehand red circles... with code? ...
In the 2014 challenge, Michael Stern suggests using OCR to parse to 2014. I'd like to take this challenge in a different direction. Using built-in OCR from the language/standard library of your ...
Based on the very successful Twitter image encoding challenge at Stack Overflow. If an image is worth 1000 words, how much of an image can you fit in 114.97 bytes? I challenge you to come up with a ...
You have two images (64x64 pixels each): Your program must take the file names of each of them as command line arguments and determine which has more average saturation among their pixels. The ...