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

Dewraping with focus stacking

DIY Book Scanner Skunk Works. Share your crazy ideas and novel approaches. Home of the "3D structure of a book" thread.
User avatar
Gerard
Posts: 154
Joined: 17 Oct 2010, 07:15
Number of books owned: 0
Location: Berlin (Germany)

Re: Dewraping with focus stacking

Post by Gerard » 22 Nov 2010, 04:11

Hi,

if i have to trade bigger steps against intensity stability i would choose bigger steps, intensity can be normalized later

do you think 2 GB is enough?

when not we can transfer in more that one step

spamsickle
Posts: 596
Joined: 06 Jun 2009, 23:57

Re: Dewraping with focus stacking

Post by spamsickle » 22 Nov 2010, 17:45

Each of the RAW (CRW) images my camera generates is 10,341,600 bytes. I'm also taking a JPEG along with each RAW image, so a single pass with the chip I have (2GB) will have less than 200 images. I can go buy a larger-capacity chip, but first I'd like to go with a larger step size and no duplication-for-intensity-averaging, and see what you can do with 2GB. If that turns out to be insufficient, the experiment should tell us more about what is necessary.

User avatar
Gerard
Posts: 154
Joined: 17 Oct 2010, 07:15
Number of books owned: 0
Location: Berlin (Germany)

Re: Dewraping with focus stacking

Post by Gerard » 05 Jan 2011, 08:27

i have now two canon a495 and will try raw capturing, this will cost me some time to understand chdk, raw and so on but i still on the idea

User avatar
daniel_reetz
Posts: 2797
Joined: 03 Jun 2009, 13:56
E-book readers owned: Used to have a PRS-500
Number of books owned: 600
Country: United States
Contact:

Re: Dewraping with focus stacking

Post by daniel_reetz » 05 Jan 2011, 08:32

Cool, let me know if I can help somehow... I do have a Nikon SLR which can get very shallow depth of focus.

User avatar
Gerard
Posts: 154
Joined: 17 Oct 2010, 07:15
Number of books owned: 0
Location: Berlin (Germany)

Re: Dewraping with focus stacking

Post by Gerard » 06 Jan 2011, 08:18

sony seams to use this for 3d images

http://news.sel.sony.com/en/press_room/ ... 58846.html

User avatar
rob
Posts: 773
Joined: 03 Jun 2009, 13:50
E-book readers owned: iRex iLiad, Kindle 2
Number of books owned: 4000
Country: United States
Location: Maryland, United States
Contact:

Re: Dewraping with focus stacking

Post by rob » 06 Jan 2011, 10:55

Are they joking? They're planning on selling the DSC-WX9 in March for $220. It will be 16.2 MP, and have 3D still image capture. Is this the category-killer for DIY Book Scanner cameras?
The Singularity is Near. ~ http://halfbakedmaker.org ~ Follow me as I build the world's first all-mechanical steam-powered computer.

User avatar
daniel_reetz
Posts: 2797
Joined: 03 Jun 2009, 13:56
E-book readers owned: Used to have a PRS-500
Number of books owned: 600
Country: United States
Contact:

Re: Dewraping with focus stacking

Post by daniel_reetz » 06 Jan 2011, 11:04

I'll buy one just to find out, but the multiple-position focus 3D is usually super-coarse. Like, you can roughly separate a person standing in front of a distant city background coarse. And AFAIK, the output is processed anaglyph or designed specifically for their TVs (I'll bet our new member Thrillscience can talk a little more about this kind of thing; he has the Fuji 3D cams).

In any case, the new compacts coming out now are making DIY Book Scanning all that much better... with each new generation of tech, we get much, much better tools.

Post Reply