On Apr 22, 2005, at 10:20 AM, Nicholas Ward wrote:

Hi, I was just wondering if anyone out there could recommend a good book/resource on image processing stuff. I just got pidip running and havent a clue what a bit mask is. I have a rough idea about pixel group processing and want to learn more on all this great stuff with a view to understanding whats goin on in GEM PIDIP a bit better. One other thing I noticed that the pdp_rec~ demo patch writes its file to private/tmp (os x). So i spent yesterday creating away writing to that folder and then found all the mov files gone when I rebooted at home! Should i take it their gone forever and the contents of /private/tmp are deleted on reboot? thanks all

...the following two pages are great places to start:

http://www.efg2.com/Lab/Library/ImageProcessing/Algorithms.htm http://homepages.inf.ed.ac.uk/rbf/HIPR2/wksheets.htm

...and yes, private/tmp is a temporary directory that gets flushed on restart: you should be able to send a message to pdp_rec~ to tell it to save to another directory...

l8r, james

thing I noticed that the pdp_rec~ demo patch writes its file to private/tmp (os x). So i spent yesterday creating away writing to that folder and then found all the mov files gone when I rebooted at home! Should i take it their gone forever and the contents of /private/tmp are deleted on reboot?

yes, but if you're really desperate, and you haven't used your HD too much since, it *might* be possible to get them back with the debugfs program.

1. as root, run the program:

debugfs /dev/hda<#>

2. at the prompt, list all deleted files with:

lsdel

3. then recover the file with:

dump <inode#> /path/to/recover/to

I wouldn't be too excited about this though - especially since you're trying to recover binary content. For text-based stuff, I think you can sometimes get some stuff back.

Hope this helps.

-Mike