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

new here, thinking about a book scanner

Don't know where to start, or stuck on a certain problem? Drop by and tell us about it. Feel like helping others? Start here.
bsbob
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Re: new here, thinking about a book scanner

Post by bsbob » 27 Apr 2014, 13:23

Confirming the sky is blue...

I've got one pane of glass from a scanner I found. I'd need another (or non-reflective acrylic something, the real goal).

So I've been looking for that second pane.

Today at Walmart, what do I see? Frames! Graduation frames of various sizes. And cheap -- $2/frame. So I got two 8.5x11's.

Still could experiment with them I guess. And they weren't that expensive. :roll:

It's hard to position them in the book I'm working on.
Tricky to flip pages then too.
And I see lots of reflection...

That's taking the glass out, not even attempting any pics with them. $4 of learning I guess, unless I return them right away.






Landin’s platen is about 9x14” 35cm x 22.5cm

Hm...
http://www.dpreview.com/forums/thread/3211080
Looks like I'd want anti-reflection acrylic.

Looks interesting.
http://www.tru-vue.com/Consumers/acrylic
Last edited by bsbob on 27 Apr 2014, 15:05, edited 1 time in total.

cday
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Country: UK

Re: new here, thinking about a book scanner

Post by cday » 27 Apr 2014, 14:26

bsbob wrote: http://www.dpreview.com/forums/thread/3211080
Looks like I'd want anti-reflection acrylic.
You're referring to the following paragraph from the above link presumably?
Acrylic has two kinds that reduce glare. The cheapest is usually called anti-glare and the expensive stuff is anti-reflection ... The former reduces glare by fuzzing the reflection and has the side effect of reducing the image dynamic range. It reduces glare by reflecting light in different directions ... Anti-reflective acrylic is coated with a special optical film that reduces the reflectance of light. look for reflective levels below 2%. This is similar to the way museum glass works.
Rather than an optical film, one manufacturer of anti-reflective acrylic refers to using a "Magnetron sputtered coating" which should have a very fine texture.

Some links and downloads from a bit of Googling:

http://www.tru-vue.com/Museums/

http://www.acrylite-shop.com/US/us/index.htm
Optium M99-01188_Anti_Reflec_SS.pdf
(913.33 KiB) Downloaded 173 times
M99-01263_NP_FS_ENG.pdf
(436.52 KiB) Downloaded 159 times
3075C AntiReflective sell sheet.pdf
(417.63 KiB) Downloaded 153 times

bsbob
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Re: new here, thinking about a book scanner

Post by bsbob » 27 Apr 2014, 15:07

I'm thinking it just needs to be 'good enough.' Not perfect.

Where do you get the stuff though?

Maybe this one?
http://www.tru-vue.com/Consumers/acrylic
Which one is the best non-reflective, still within a reasonable price....? Reasonable being under $50 total I guess for two pieces.


Get it here I guess...?
http://www.tru-vue.com/Find-A-Distributor/

bsbob
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Re: new here, thinking about a book scanner

Post by bsbob » 27 Apr 2014, 16:57

Canon Powershot a1400
They put the shutter trigger as a button in the middle of the ring that spins to zoom in and out.

So... Guess what happens once in a while when you hit the shutter? Yep. Zooms in or out. I've only done that a couple times but that's enough.


Definitely speedy, taking pics this way.
Definitely good to take them all straight in a row. Or at least have everything *exactly* the same.

However....
Taking pics from two little tripods, no platen... Except for the bend in the page, that might actually be good enough for me. it would be nice to get them 'all in one' form after that but even still... The info is there to be read.

I just zoom the cameras in to capture as much of the page as possible, but not chop any.


For the labeling of SD cards and cameras, trying to get the serial number on the camera to know which camera is which... It's easy enough to just look at the pics and see which is the left or right page set.




Grr.... Looking the results of today's batch of pics.... They're yellow. Haha. I moved my little rolling table two feet over and I get yellow pics. Fudge. :roll: :lol: Still fine. Legible. But they don't match the ones from the other day. Great... It's just the one camera. All the left hand pages are yellow. Warm light. The right side are what I'd describe as 'cool white.' :roll: Yep... One side was picking up the light from the room's overhead light. The other side was picking up light from the lamp nearby. Darnit... Haha. Oi....

I saw Scan Tailor can clear up some stuff like this. I think.
Last edited by bsbob on 27 Apr 2014, 17:25, edited 1 time in total.

cday
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Re: new here, thinking about a book scanner

Post by cday » 27 Apr 2014, 17:08

bsbob wrote:Where do you get the stuff though?
In general once you have the name of a suitable product Googling the name should bring up stockists.

bsbob
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Country: USA

Re: new here, thinking about a book scanner

Post by bsbob » 27 Apr 2014, 17:32

Hm. This one looks best.
http://www.tru-vue.com/products/optium-museum-acrylic/
Tru Vue Optium Museum Acrylic


I wonder what the price is though....

Or not... OMA -- That' 16% reflective.


This one's 8%
http://www.tru-vue.com/products/reflect ... l-acrylic/
Anti-scratch sounds good too though.

dpc
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Re: new here, thinking about a book scanner

Post by dpc » 27 Apr 2014, 19:34

From that same webpage, this one is 1% reflected light: http://www.tru-vue.com/products/ar-reflection-free/

I've never understood why people want to use these non-reflective glass/acrylic panes in scanners. If you can control the lights in your room (i.e. turn them off or put a hood/cover over your scanner), there's no reason why you should see reflections (i.e. glare) in the images produced from a properly designed scanner.

I realize you're just toying around with your new cameras and a few glass plates at the moment (your progress posts are fun to read) and that's likely why you're getting these reflections in your images. Once you get those platen plates locked down to the correct angle and your cameras and light positioned properly these problems should go away.

In the meantime it might be worthwhile to put some black paper under the glass instead of a book and try to determine the source of the reflection (the black paper makes the plate glass act more like a mirror). Knowing the source of the reflection is the first step toward mitigating the artifact.

bsbob
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Country: USA

Re: new here, thinking about a book scanner

Post by bsbob » 27 Apr 2014, 22:21

Yep. I want to get some black paper. I'm going to keep the cheap Walmart glass. (until I accidentally break them...) They can be good for finding reflection/angles. The shinier, the better for that. (And now I remember the mirror youtube video from the founder guy here.... Mirrors would be the best. Shiny glass is good enough though.)

The point of the non-reflective platen would be to make the scanner as good as it can get. Or not spoil some pics. I think it's going to get a little annoying if I notice, "Hey, there's the reflection on the platen of the left bar on the structure." Just knowing it's there.

I'm still just fishing though. I read a few posts mentioning how expensive museum grade acrylic is.

Glad you like the thread. I didn't know if anyone was reading it. I'm sure some of this is reinventing the wheel (without the effort put in to actually invent anything). But a well-travelled path. Learning by doing for sure. There's a difference reading and watching videos and then taking your own book and set up and seeing a glitch.

I was surprised with the cheap glass today. One page I think would have been ok. I had a light (the darn yellow light) about a foot above and off to the right from the left page. I didn't see any reflections. I didn't want to experiment with reflections though. I was still happy finding the cheap glass. "I'm set for the platen now. Only $4.... Oh crud, look at all the reflections....


What I also don't have -- The covering. I'm still kind of leaning toward making my own pvc pipe structure, just to make something else out of pvc pipe. I can make it exactly as large as I want. Probably cover it with two layers of black bedsheets, unless there's something better. Actually... White pvc pipe (I would paint that).... But the sheets could possibly be on the inside, pipes outside. I wonder if something like that might work. It would look weird, but if it works and it's easy to make and set up... maybe.

bsbob
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Country: USA

Re: new here, thinking about a book scanner

Post by bsbob » 27 Apr 2014, 22:24

Yes, this one is looking best so far now.

http://www.tru-vue.com/products/ar-reflection-free/

Oh... This is glass though. That's more scratch resistant though, definite plus. If it matters though. I was only looking at the acrylic ones. Glass is supposed to be cheaper though too. And heavier, but that might not matter.

I'm still somewhat picturing some kind of platen glass holder along the edges. If it can hold the V's on both ends and maybe something along the top edge, out of the way of the cameras.... The middle part in the book wouldn't even need glue, I don't think. The platen on the arm has to be able to move a bit to adjust to the book and sink in so the pages are flat to the platen.


I've seen a screen privacy cover for a laptop. It definitely blurred things up a bit. I really don't think I want that effect. I'm thinking the 'non-glare' treatments might do that. If it's diffusing the light.... probably fine for a macro view, but if I shooting a pic in detail up close, it's probably splitting the light up for that. Which could still be fine, but if I can avoid it now in the planning phase, great.


Haha... Amusing... I just wondering if something like fishing line could work instead of a platen. The goal is flat pages. No glass/plastic means no reflection. Unless clear line would reflect. String/line could get in the way of the text though, esp. for diacritics I suppose. I wonder if something like that could work though.... A grid of clear/transparent wire/lines.... Like a mesh.... It would probably be noticeable in the pics though. I do have some fishing line around somewhere. It would like pressing a tennis racket mesh part into a book to flatten the pages I guess.

bsbob
Posts: 91
Joined: 16 Mar 2014, 15:05
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Country: USA

Re: new here, thinking about a book scanner

Post by bsbob » 28 Apr 2014, 19:04

Article looks good...
http://floodlightled.hubpages.com/hub/H ... emperature


I guess I'm buying someone a gift, so I'm looking at lights to get free shipping on Amazon. :roll:

Looking at these...
http://www.amazon.com/dp/B00CY3490I?_en ... 8&psc=1&s=

Oi...
20W... Because it's better than 10W... Should be bright.
Two of those... Because I don't know... Would one be enough? Then get two? Should make it obvious if four are needed.

I'm trying to figure out cool white vs. warm white. I'm leaning toward cool white. So there's no yellow tint.
"9. Color Temp: 6000~6500K." according to Amazon. (as accurate as Amazon specs are...)


I did think... Get both. One of each. Or... Get two of each. Then you could swap them out. That sounds like a waste though. If I got one of each, I wonder if they would blend. Probably not. I'd end up with a yellow page and a whiter page.

I see this is 6000K. Not quite the 7000K that website mentions.


Just like the cameras. There's some kind of pressure to buy something. :roll: I need the gift here soon.

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