Skip to content

Instantly share code, notes, and snippets.

@KartikTalwar
Forked from lelandbatey/whiteboardCleaner.md
Created April 3, 2014 07:07
Show Gist options
  • Save KartikTalwar/9949599 to your computer and use it in GitHub Desktop.
Save KartikTalwar/9949599 to your computer and use it in GitHub Desktop.

Description

This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.

The script is here:

#!/bin/bash
convert $1 -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 $2

Results

Here are some of the input images:

And here are the results:

Usage

Assuming it's saved as a file named whiteboardClean.sh, the command is ./whiteboardClean.sh {name of input file} {name of file to output to}.

Here's an example:

./whiteboardClean.sh example1.jpg output1.png

How I Came Up With This

I was doing a lot work with whiteboards and I'd been taking pictures of them to document what had been written. I wanted a more clean version of the pictures though, something that captured the essence of what a whiteboard image showed.

Eventually I found this excellent guide to cleaning up whiteboard photos using GIMP. However, I found I wanted more automation. So, I spent a few hours yesterday figuring out how to do the same thing using ImageMagick from the command line and made this script.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment