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 "$2"
| inoremap <silent> <Bar> <Bar><Esc>:call <SID>align()<CR>a | |
| function! s:align() | |
| let p = '^\s*|\s.*\s|\s*$' | |
| if exists(':Tabularize') && getline('.') =~# '^\s*|' && (getline(line('.')-1) =~# p || getline(line('.')+1) =~# p) | |
| let column = strlen(substitute(getline('.')[0:col('.')],'[^|]','','g')) | |
| let position = strlen(matchstr(getline('.')[0:col('.')],'.*|\s*\zs.*')) | |
| Tabularize/|/l1 | |
| normal! 0 | |
| call search(repeat('[^|]*|',column).'\s\{-\}'.repeat('.',position),'ce',line('.')) |