Daniel Reetz, the founder of the DIY Book Scanner community, has recently started making videos of prototyping and shop tips. If you are tinkering with a book scanner (or any other project) in your home shop, these tips will come in handy. https://www.youtube.com/channel/UCn0gq8 ... g_8K1nfInQ

Search found 3 matches

by cccshit
07 Nov 2010, 13:40
Forum: Software
Topic: Preserving colored text
Replies: 20
Views: 19918

Re: Preserving colored text

Yes. Your are absolutely right pointing out that, and not me. Actually my proof was incorrect, and my method worked fine just because a despeckle filter was later applied. By illumination I meant lightness. Probably it will work with brightness as well, but I really ignore the difference between both.
by cccshit
07 Nov 2010, 11:41
Forum: Software
Topic: Preserving colored text
Replies: 20
Views: 19918

Re: Preserving colored text

No and no. This is a messy process and wrong encoding scheme. 1) Just as you convert to b/w by setting a threshold level for illumination, in order to convert to three colours you may as well only consider illumination and set two thresholds (this method is valid since black and white are unique RGB...
by cccshit
17 Sep 2010, 09:11
Forum: Scanners and Build Threads
Topic: yet another quick and dirty approach
Replies: 8
Views: 16144

Re: yet another quick and dirty approach

It should be worth knowing what exactly the pattent describes and to which territories it applies.
Actually, the infrared technology is used since long in many flatbed photo scanners to detect and remove dust and scratches. Even VueScan supports it.