This challenge involves drawing pictures on a screen or generating image files. For ASCII art output, use [tag:ascii-art]. For images as input, use [tag:image-processing].

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15
votes
4answers
473 views

I like Pythagorean trees

...so this is a challenge to make me a tree. Produce a program or function called tree which takes a single integer argument, N and draws a Pythagorean Tree N levels deep, where level 0 is just the ...
0
votes
1answer
422 views

“How many squares can you see?” [closed]

Sorry, guys, I understand that this is a low quality post, so please cast your close votes. Intro: Perhaps we all have come across "How many squares are there in the picture?" puzzles. (Right?) ...
8
votes
3answers
562 views

building circuit for divisibility by 3

A boolean circuit in TCS is basically a DAG consisting of And, Or, Not gates, and by what is known is "functional completeness" they can compute all possible functions. eg this is the basic principle ...
10
votes
2answers
608 views

Make a word cloud from a text

The code should take text from standard input: The definition of insanity is quoting the same phrase again and again and not expect despair. The output should be a PNG file containing the word ...
53
votes
6answers
5k views

Is it dark outside? Draw a sun map!

Our closest star, the sun, is quite fidgety. The times it rises and sets depend on where you are, and whether it is winter or not. We would like to be able to deduce if the sun is shining outside ...
12
votes
2answers
452 views

What do you see in an inkspot? Rorschach generation'

So I'd like you to attempt to generate Rorschach images like the below image: Here is a link to further inspiration. This is a popularity contest, but I will say that colours are likely to be more ...
6
votes
1answer
324 views

Create a random 3D asteroid

Imagine you are working on a 3D adaptation of the classical video game Asteroids. Your task is to write an algorithm that can create a random 3D asteroid. This is a popularity contest, not code golf. ...
50
votes
27answers
6k views

Mandelbrot image in every language

I always used a Mandelbrot image as the 'graphical' version of Hello World in any graphical application I got my hands on. Now it's your guys' turn. Language must be capable of graphical output or ...
24
votes
17answers
2k views

Output an image of your source code (not-quite-a-Quine)

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 ...
179
votes
38answers
41k views

Images with all colors

Similar to the images on allrgb.com, Make images where each pixel is a unique color (no color is used twice and no color is missing). Give a program that generates such an image, along with a ...
17
votes
8answers
1k views

Cubify This! A lesson in grayscale… er… color… er… whatever

Being a big fan of the Rubik's cube and of cool art, I've been working on combining the two together to do some really cool stuff. Basically solving miniature Rubik's cubes to form rudimentary pixels ...
0
votes
1answer
152 views

Plot gif of 3 dimensional heart in R [closed]

inspired by this blog: http://alstatr.blogspot.co.uk/2014/02/r-animating-2d-and-3d-plots.html I made a 2D gif of a heart with: library(animation) saveGIF({ for(i in 1:150){ dat<- ...
6
votes
1answer
253 views

Graphical, networked, two-(human)-player Tic-Tac-Toe

Create a Tic-Tac-Toe game that allows two human players to play against each other using two networked devices. Requirements: Network play. Program must let both players know whose turn it is. ...
12
votes
1answer
468 views

QR Codes… and all that Jazz!

This is going to be relatively challenging code-golf challenge. Input: Any URL, must have the protocol attached, e.g. http://codegolf.stackexchange.com (which will be our test case) Output: A ...
43
votes
41answers
15k views

Make a PNG image with “Hello World!” with programming APIs, in the shortest code possible

So, I want you to make a PNG image that says "Hello world!" and nothing else on a distinguishable background using only an image making API (eg ImageMagick) and return the image. Fewest characters ...
11
votes
11answers
904 views

Render a version of the BBC Micro owl logo

http://en.wikipedia.org/wiki/File:BBC_owl.svg Can you render out a version of the BBC Micro Owl logo as per above from code? Rules: You can use any programming language you like. Output can be ...
11
votes
13answers
2k views

Generate a 1920 x 1080 graphic with 2,073,600 unique colours

Challenge: Write a program that outputs a graphic file 1920 pixels wide by 1080 pixels high. Every one of the 2,073,600 pixels within the graphic must be a unique colour and no colour values should ...
12
votes
10answers
1k views

stupid restrictions and desert

So, you were sitting at your desk, golfing a program to calculate the first 20 digits of pi, and along comes your boss and throws your apple IIe out the window. You are now working on a new project ...
0
votes
5answers
635 views

Lua: Render a chess board in smallest code

I'm creating a simple challenge here as a first test of the community's reactions. Please let me know if this challenge is the kind of thing you guys like or what I can improve... :) The task is ...
9
votes
3answers
553 views

Let's simulate a random snowflake

I saw this question on http://mathematica.stackexchange.com/ and I think it's pretty cool. Let's make the snowflake with other programming languages. This is a quote from the original question: ...
9
votes
17answers
844 views

Histogram generation

Write the shortest program that generates a histogram (a graphical representation of the distribution of data). Rules: Must generate a histogram based on the character length of the words ...
1
vote
13answers
569 views

Generate a pentagram star

Your challenge is generate a pentagram like below, the star don't need filled. Shortest code wins.
19
votes
47answers
3k views

Hello World window

Create a window that says hello world inside and nothing else. You can not have any ok or cancel buttons inside. It must be just a plain window that says hello world. I do not care about the contents ...
10
votes
3answers
324 views

Recreation of Piet Mondrian Composition

Good Afternoon, Your goal is to, in the least amount of source code bytes, recreate any of Piet Mondrian's 'Composition' paintings (for instance, Composition 10) The recreation can either use the ...
28
votes
8answers
2k views

xkcd Golf: “Percentage of the screen that is [x] color”

So I think we've all probably seen this xkcd comic: : This might either be too general or too difficult, I'm not sure. But the challenge is to create a program in any language that creates a window ...
2
votes
9answers
651 views

Display Scrolling Waves

The challenge is to display and scroll a sine waveform in the least number of characters. Restrictions: Total height of wave must be at least seven units (characters, pixels, etc). The generated ...
5
votes
3answers
770 views

ASCII-visualize a graph

Your mission, should you choose to accept it, is to input a series of point pairs that form a graph, like this: A,B C,A B,A A,D A,E F,G C,G You must then output an ASCII visualization of the ...
7
votes
4answers
934 views

Breakout in half an hour

When I was a young teen I had a very boastful friend who claimed he could code up breakout (http://en.wikipedia.org/wiki/Breakout_(video_game)) in half an hour. Half an hour later he had done a great ...
4
votes
6answers
660 views

Cropping an image succintly

I am constantly frustrated by how complicated it is to write graphical programs that would have been only a few lines of code 20+ years ago. Since the invention of the mouse this has become even ...
13
votes
5answers
2k views

“Sorry, young man, but it's Turtles all the way down!”

Execute a Lindenmayer System A Lindenmayer System (or L-system) is related to Thue and Post systems, and is used in botanical modeling and fractal generation. An L-system is described by ...
7
votes
6answers
1k views

Generating PBM bitmap files from ASCII text

The PBM (Portable BitMap) format is a very simple ASCII black and white bitmap format. Here's an example for the letter 'J' (copy-pasted from the wikipedia link): P1 # This is an example bitmap of ...
31
votes
13answers
2k views

Generate the Stack Overflow logo

The challenge is to generate an image similar to the StackOverflow logo: The output must contain: Image size 64*64 or greater A gray |__| shaped base A curved segmented stack coming up from the ...
11
votes
2answers
2k views

Generate Newton fractals

You all know the Newton method to approximate the roots of a function, don't you? My goal in this task is to introduce you into an interesting aspect of this algorithm. Newton's algorithm converges ...
11
votes
4answers
617 views

Help Mr Jones to enjoy his bicycle round-trip

Mr Jones wants to do a round-trip on his bicycle. He wants to visit several cities in arbitrary order, but his route must not cross it self, since he hates to be at the same place twice in his ...
7
votes
8answers
1k views

Output a playable crossword grid

Write a program to produce a file containing a crossword grid that the user can print out and work the puzzle on. Input A filename representing a crossword grid file and optionally a second ...