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https://github.com/wsdt/stringtopng

This program converts arbitrary data (random or provided string) into a colorful picture (randomized colors).
https://github.com/wsdt/stringtopng

Last synced: 6 days ago
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This program converts arbitrary data (random or provided string) into a colorful picture (randomized colors).

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README 

        
# String 2 Png in GoLang [![Maintenance](https://img.shields.io/badge/Maintained%3F-no-red.svg)](https://GitHub.com/wsdt/GoLang_StringToPng/graphs/commit-activity) [![Generic badge](https://img.shields.io/badge/In-GO-BLUE.svg)](https://golang.org/) [![GitHub license](https://img.shields.io/github/license/wsdt/GoLang_StringToPng.svg)](https://github.com/wsdt/GoLang_StringToPng/blob/master/LICENSE) [![Donate](https://img.shields.io/badge/Donate-Pay%20me%20a%20coffee-3cf)](https://github.com/wsdt/Global/wiki/Donation) [![saythanks](https://img.shields.io/badge/say-thanks-ff69b4.svg)](https://saythanks.io/to/kevin.riedl.privat%40gmail.com)

First of all this is my first Go project, so please bare with me. 



## What is it? [![Open Source Love svg2](https://badges.frapsoft.com/os/v2/open-source.svg?v=103)](https://github.com/ellerbrock/open-source-badges/) ![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat-square)

This program converts arbitrary strings into a colorful .PNG. 



Example pictures: [pic1](https://github.com/wsdt/GoLang_StringToPng/blob/master/image_0.png), [pic2](https://github.com/wsdt/GoLang_StringToPng/blob/master/image_1.png), 

[pic3](https://github.com/wsdt/GoLang_StringToPng/blob/master/image_2.png)



![alt text](https://github.com/wsdt/GoLang_StringToPng/blob/master/image_0.png "Example image") #

![alt text](https://github.com/wsdt/GoLang_StringToPng/blob/master/image_1.png "Example image") #

![alt text](https://github.com/wsdt/GoLang_StringToPng/blob/master/image_2.png "Example image")



E.g. a random string like "5dfs45654sfefsfdfdsfew09´" or even a useful information like "Some secret geeky message." can be encoded into a picture. 



## Get started

As it is generally a bad idea to execute/download random .exe-files, I did not push it to Github. To run this program just execute following command in the src-directory. 

```go run *.go```



The **[main.go](https://github.com/wsdt/GoLang_StringToPng/blob/master/src/main.go)** contains some configuration params you can change if you want to. 

```

const USE_RANDOM_STR = true

// Length of random str generated (takes only effect if USE_RANDOM_STR true)

const RANDOM_STR_LENGTH = 30

// String_to_encode is only used if use_random_str is false!

const STRING_TO_ENCODE = "!ä"

/*Desired name of outputted image (saved in current folder)

Your image(s) will be saved as image_0.png, image_1.png ...*/

const PIC_OUTPUT_FILE = "image"

//Size of outputted image

const PIC_WIDTH = 200

const PIC_HEIGHT = 200

/*Encode desired string in multiple random colors (so structure of all the

additional outputted images will be the same, but the colors are randomized.



This variable should be bigger than 0! */

const ENCODING_VERSIONS = 3



/** Is used instead of STRING_TO_ENCODE in case

of USE_RANDOM_STR = false. */

const charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ<>|µ,;.:-_#'+*~^°!§$%&/()=?`´1234567890ß{[]}²³"

```



## How does it work?

The colors itself do not contain any information about the inputted string and are completely randomized. 



Therefore, each char of the string/information will be converted to unicode (numeric representation -> e.g. 'H' = 72, ...). This numeric representation is going to be used as an indicator of how long a color is supposed to stay. 



Consequently, a char like 'H' with the representation of 72 will cause 72 pixels in a random color. When the message is too short for the image-size the information will be repeated (so the image might contain the information multiple times). 



As the numeric representation of each char is saved into the image, the image could be theoretically converted back to a string. 



## Some thoughts

As images, videos, sound-files etc. consist of several chars (e.g. if you open one of those files via a text-editor) you could also encode a video/sound-file as such a image (for sure, the image would need to have the right size). 



But yeah, this whole project is just supposed to be something funny or whatever. To be honest I just wanted to use go-routines and the image-library :)