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

Two very similar pages, two very different results

Scan Tailor specific announcements, releases, workflows, tips, etc. NO FEATURE REQUESTS IN THIS FORUM, please.
0kelvin
Posts: 24
Joined: 10 Nov 2012, 17:14
Number of books owned: 0
Country: Brazil

Two very similar pages, two very different results

Post by 0kelvin » 24 Apr 2018, 11:49

this page

Image

yields this result

Image

but this page

Image

yields this black thing

Image

L.Willms
Posts: 99
Joined: 21 Sep 2016, 10:51
E-book readers owned: Tolino Shine
Country: Germany
Location: Frankfurt/Main, Germany

Re: Two very similar pages, two very different results

Post by L.Willms » 24 Apr 2018, 16:56

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.

dpc
Posts: 268
Joined: 01 Apr 2011, 18:05
Number of books owned: 0
Location: Issaquah, WA

Re: Two very similar pages, two very different results

Post by dpc » 24 Apr 2018, 20:25

Can you post a link to the second image (page 208) as it came right from the camera (without the shading and selection rects added by ST)?

L.Willms
Posts: 99
Joined: 21 Sep 2016, 10:51
E-book readers owned: Tolino Shine
Country: Germany
Location: Frankfurt/Main, Germany

Re: Two very similar pages, two very different results

Post by L.Willms » 25 Apr 2018, 03:35

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, but I have to admit that I am overwhelmed by the big number of controls available in the "Output" step of this latest version of Scan Tailor.

0kelvin
Posts: 24
Joined: 10 Nov 2012, 17:14
Number of books owned: 0
Country: Brazil

Re: Two very similar pages, two very different results

Post by 0kelvin » 25 Apr 2018, 10:36

https://postimg.cc/image/cj0psw4u1/ Here is the original scanned page.

The other images are printscreen from scantailor itself (latest advanced version)

In the whole book thre are about 5 pages that happen to produce that black thing, all others are OK.

L.Willms
Posts: 99
Joined: 21 Sep 2016, 10:51
E-book readers owned: Tolino Shine
Country: Germany
Location: Frankfurt/Main, Germany

Re: Two very similar pages, two very different results

Post by L.Willms » 25 Apr 2018, 12:34

0kelvin wrote:
25 Apr 2018, 10:36
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 = OFF
Morphological smoothing = OFF

I had also "Color segmentation = OFF" in the box "Color operations", but I think that this did not the decisive setting.

cday
Posts: 221
Joined: 19 Mar 2013, 14:55
Number of books owned: 0
Country: UK

Re: Two very similar pages, two very different results

Post by cday » 26 Apr 2018, 02:12

L.Willms wrote:
25 Apr 2018, 12:34
Unfortunately I can't upload images to this forum.
Why not?

You should be able to attach files, and quite large file sizes relative to some forums, using the 'Attachments' tab below, and then optionally display images 'inline' in your posts.

However, only certain file formats can be uploaded directly, but it should be possible to attach any file if it is placed in a ZIP or similar archive.

L.Willms
Posts: 99
Joined: 21 Sep 2016, 10:51
E-book readers owned: Tolino Shine
Country: Germany
Location: Frankfurt/Main, Germany

Re: Two very similar pages, two very different results

Post by L.Willms » 26 Apr 2018, 02:49

cday wrote:
26 Apr 2018, 02:12
L.Willms wrote:
25 Apr 2018, 12:34
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.

I try again:
test.png
BTW, in spite of Mode = "Black & White", it had a grey background. But converting it to binary Black&White produced the above image (made with PMview)
Einstellungen.png
My settings for this result
Well, it works! Thanks for encouraging me to try it again!

dpc
Posts: 268
Joined: 01 Apr 2011, 18:05
Number of books owned: 0
Location: Issaquah, WA

Re: Two very similar pages, two very different results

Post by dpc » 26 Apr 2018, 11:49

Okelvin,
Thanks for providing the original image.

I didn't experience the problem that you saw. I used the default setting for ST version 0.9.11.1 (64-bit, non-enchanced version) and viewed the output in Black & White and in Mixed output mode and the page was displayed as you would expect. I can post those output images if that would somehow help you to determine the source of your problem.

0kelvin
Posts: 24
Joined: 10 Nov 2012, 17:14
Number of books owned: 0
Country: Brazil

Re: Two very similar pages, two very different results

Post by 0kelvin » 01 May 2018, 10:41

Changing the settings doesn't help. However, if I go in image editing program and erase the gray background by hand, then ST doesn't "get confused" by the background.

STA 1.0.12. Different hardware doesn't affect the processing, does it?

Post Reply

Who is online

Users browsing this forum: No registered users and 0 guests