About a month ago, after searching for an existing solution, I built a little script to take photo's of whiteboards and clean them up/make them into near perfect digital representations. Here's the script:
#!/bin/bash
convert $1 -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 $2
Example Input:
Input 1: http://i.imgur.com/CTSIPwm.jpg
Input 2: http://i.imgur.com/37GXrwo.jpg
Example Output:
Output 1: http://i.imgur.com/Qf3jkBW.png
Output 2: http://i.imgur.com/oNueb0L.png
The basic procedure was outlined in this excellent post for cleaning up whiteboard photos using GIMP: http://matthew.mceachen.us/blog/how-to-clean-up-photos-of-whiteboards-with-gimp-403.html I just replicated the procedure using Imagemagick.
Since I do a ton of work on whiteboards nearly every day, I found this really helpful for managing photos of my whiteboard work. I figured I should share this with you guys, since the HN community seems like the kind of people who'd make use of it.
Second, posts without urls (i.e. Ask HNs) have an automatic rank penalty applied to them. Could you please put it up at an external url—even just a pastebin would do—and resubmit it? It'll have a much better chance of making the front page, where it belongs.
Alert readers may notice that I have to resort to this because we don't really have any tools for making stories go up in rank. It's upvotes or nothing.
Also, I've got a sweet plan to get all the good Show HNs the attention they deserve. It's a matter of finding time to implement it.