Search found 134 matches

by L.Willms
16 May 2018, 02:51
Forum: Scanners and Build Threads
Topic: Libreflip - a new open source page-turning bookscanner
Replies: 16
Views: 51960

Re: Libreflip - a new open source page-turning bookscanner

Could you please tell more about those "USB 3.0 Industrial Cameras with 13 Megapixel each" which are included in the "just electronics" package? I had been looking for such, but found only cameras geared towards video, not stills. Added somewhat later: I found it on your website:...
by L.Willms
12 May 2018, 16:06
Forum: Cameras and Electronics
Topic: Is there an optimal angle of view of the camera?
Replies: 4
Views: 11465

Re: Is there an optimal angle of view of the camera?

After writing my initial post, I came to the conclusion that the best is a vertical look on the page, a 90° view or a 0° angle of view. That's what a scanner does with its moving bar of sensors. But when using a camera, additional constraints have to be considered, as duerig explained. Theoretically...
by L.Willms
05 May 2018, 07:01
Forum: Cameras and Electronics
Topic: Is there an optimal angle of view of the camera?
Replies: 4
Views: 11465

Is there an optimal angle of view of the camera?

Is there an optimal angle of view of the camera? Consider a rectilinear lens in a camera used to photograph an object at a distance S1 , and forming an image that just barely fits in the dimension, d , of the frame (the film or image sensor), where F is meant to be the focal length, which then resul...
by L.Willms
05 May 2018, 06:46
Forum: Cameras and Electronics
Topic: Casio Exilim EX-FR100 camera module and controller
Replies: 2
Views: 7907

Re: Casio Exilim EX-FR100 camera module and controller

The 10.2 megapixel with 4000x3000 pixels are sufficient for 300dpi of an ISO A4 sized page, and more dpi of smaller pages. As a disadvantage I see the lack of zoom, which requires to adjust the distance of the camera to the page relative to the page dimensions. A worm drive for this in the book sca...
by L.Willms
01 May 2018, 13:18
Forum: Scan Tailor
Topic: Two very similar pages, two very different results
Replies: 11
Views: 20088

Re: Two very similar pages, two very different results

0kelvin wrote: 01 May 2018, 10:41 STA 1.0.12. Different hardware doesn't affect the processing, does it?
Same version here. Strange...
by L.Willms
26 Apr 2018, 02:49
Forum: Scan Tailor
Topic: Two very similar pages, two very different results
Replies: 11
Views: 20088

Re: Two very similar pages, two very different results

Unfortunately I can't upload images to this forum. You should be able to attach files, [...], using the 'Attachments' tab below, and then optionally display images 'inline' in your posts. I had tried that, but apparently I don't know the syntax of the BB-Commands to show images inline in a message....
by L.Willms
25 Apr 2018, 12:34
Forum: Scan Tailor
Topic: Two very similar pages, two very different results
Replies: 11
Views: 20088

Re: Two very similar pages, two very different results

https://postimg.cc/image/cj0psw4u1/ Here is the original scanned page. I got it! Unfortunately I can't upload images to this forum. Settings in the "Output" stage: Mode = Black and White In the box "Options" Cut margins = ON Equalize illumination = OFF Savitzky-Golay smoothing =...
by L.Willms
25 Apr 2018, 03:35
Forum: Scan Tailor
Topic: Two very similar pages, two very different results
Replies: 11
Views: 20088

Re: Two very similar pages, two very different results

Bom dia, Okelvin, the resolution of the images which you posted is very low. Are these just copies with a reduced size for display on this forum, or are those the images you are working with in Scan Tailor? And which version of Scan Tailor are you using? I tried your images wich Scan Tailor Advanced...
by L.Willms
24 Apr 2018, 16:56
Forum: Scan Tailor
Topic: Two very similar pages, two very different results
Replies: 11
Views: 20088

Re: Two very similar pages, two very different results

With the "notgood2.png" I get the opposite result: the table in the upper part becomes a clear black and white, while in the lower part the blue appears as all black.