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Posted by JGCASEY on August 7, 2007, 6:47 pm
On Aug 8, 3:36 am, dmehl...@keenebroadband.com wrote:
> On Aug 6, 8:30 pm, shb*NO*SP...@comporium.net (Si Ballenger) wrote:
> > On Mon, 06 Aug 2007 23:46:22 -0000, dmehl...@keenebroadband.com
> > wrote:
> > >I need to determine the best imaging method for my book scanning
> > >robot. Up to this point I have been thinking of using a standard
> > >digital camera to capture the images. However I realized with the
> > >limited battery life and storage capacity of a standard camera, I
> > >would have to purchase an additional AC adapter and use a camera
> > >capture software program which usually only works with higher end
> > >cameras. All in all the cost would be at least $400 but probably
> > >closer to $500. It seems reasonable that I could probably get a
> > >decent web cam at a lower price that could give me a good enough
> > >quality image. Most of the web cams I have looked at have a 1.3
> > >megapixel capability but with software enhancement can take a picture
> > >of about five or six megapixels. Would I be able to record a fairly
> > >good image of a page so the text is legible?
> > Probably not. Cameras generally don't do well taking pictures of
> > flat surfaces up close. Get a cheap flat bed scanner instead.
> A flatbed scanner is totally out of the question. It is much too
> difficult for imaging a book and is too slow. A regular digital
> camera can do a great job of taking a picture of a single page. I
> would definitely not be taking a picture up close. What I really want
> to know is if a web cam can take a still image that approaches the
> quality of a digital camera.- Hide quoted text -
> - Show quoted text -
A web cam is no where near the the quality of a digital camera.
Web cams are noisy and most I think are just 640x480 resolution.
My digital cameras highest resolution is 2048x1536 and is a few
years old. You don't say how you intend to download the images
to a computer or what optical character recognition you intend
to use? The slow part with the camera might be downloading
each image to the PC.
--
jc
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>robot. Up to this point I have been thinking of using a standard
>digital camera to capture the images. However I realized with the
>limited battery life and storage capacity of a standard camera, I
>would have to purchase an additional AC adapter and use a camera
>capture software program which usually only works with higher end
>cameras. All in all the cost would be at least $400 but probably
>closer to $500. It seems reasonable that I could probably get a
>decent web cam at a lower price that could give me a good enough
>quality image. Most of the web cams I have looked at have a 1.3
>megapixel capability but with software enhancement can take a picture
>of about five or six megapixels. Would I be able to record a fairly
>good image of a page so the text is legible?