Skip to content

Instantly share code, notes, and snippets.

@snetgithub

snetgithub/whiteboardCleaner.md

Forked from lelandbatey/whiteboardCleaner.md
Last active August 29, 2015 14:01
Show Gist options
  • Save snetgithub/44893a651220e32f1526 to your computer and use it in GitHub Desktop.
Save snetgithub/44893a651220e32f1526 to your computer and use it in GitHub Desktop.
Download ZIP
Raw
whiteboardCleaner.md

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 for Windows is here:

@ECHO OFF
convert "%~dpnx1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%%,91%%,0.1 "%~dpn1_converted.png"
PAUSE

Just drag any picture to the .bat file and the script will create the converted picture in the same folder.

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