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List:       kde-devel
Subject:    Re: GSoC idea: improving scanning and OCR in KDE (skanlite/kooka)
From:       Kåre_Särs <kare.sars () iki ! fi>
Date:       2012-03-07 19:28:37
Message-ID: 1521341.aIXFRYSt5R () sars-eeepc
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How do we go forward from here? =

Who is willing to mentor for an ORC library + plugins + ...? =

What does a mentor do and how much time does it take?

/K=E5re

On Wednesday 07 March 2012 16:16:59 todd rme wrote:
> 2012/3/7 K=E5re S=E4rs <kare.sars@iki.fi>:
> > On Wednesday 07 March 2012 10:59:50 todd rme wrote:
> >> On Wed, Mar 7, 2012 at 10:46 AM, Andreas Pakulat <apaku@gmx.de> wrote:
> >> > On 07.03.12 10:23:32, todd rme wrote:
> >> >> On Tue, Mar 6, 2012 at 8:03 PM, Klaas Freitag <freitag@kde.org> wro=
te:
> >> >> > On 06.03.2012 18:02, todd rme wrote:
> >> > [...]
> >> > =

> >> >> > These kind of things. Not sure if a kio is cool for any of these.
> >> >> =

> >> >> A gui able to do all the things you listed would necessarily be
> >> >> extremely complicated and likely difficult to use, unless most of t=
he
> >> >> tasks were automated push-button affairs.  In the latter case, there
> >> >> is little advantage over a kio slave.  I would think that a kio sla=
ve
> >> >> would be more natural, since users would not need to know terminolo=
gy
> >> >> or the menu structure.
> >> > =

> >> > Maybe I didn't use enough of the more fancy kio-slaves, but I have a
> >> > hard time imagining how I'd be able to use this with say konqueror. =
I'd
> >> > go to
> >> > =

> >> > kscan://<scannername>/
> >> > =

> >> > And then see whats been scanned, but how do I initiate a scan? Do I
> >> > need
> >> > to go to some special url? If so, how do I trigger the OCR creation
> >> > after scanning?
> >> =

> >> To activate a scan of an image, you either drag the image file in the
> >> kio slave to another folder, or you open it in a program (either by
> >> clicking or using the right-click menu).  In the case of dragging it
> >> to a folder, it will be automatically scanned and saved in the
> >> destination folder without the user needing to do anything else.  In
> >> the case where you open it in a program, it will probably be scanned
> >> to a temporary folder or stored in memory and then opened in the
> >> program, once again without the user doing anything else.
> >> =

> >> In the case of OCR, it would be the same, except a temporary image
> >> file woulds be scanned, OCRed, and deleted (or again stored in
> >> memory).
> >> =

> >> This, at least, is how the CD kio slave does it.
> > =

> > If somebody is interested in making such a kio slave, for simple usecas=
es,
> > I would say go ahead and scratch your itch :) I do have a some doubts
> > about the usability tho.
> > =

> > 1) You would have to "refresh" the view to get a new preview of new pho=
tos
> > placed on the scanner and the automatic photo finder is bound to fail
> > sometimes and you would be unable to select the correct part of the
> > images.
> =

> Yes, refreshing would be needed, both for this and for a standalone app.
> =

> The issue with incorrectly detected borders would also affect a
> standalone app.  Of course this is intended for simple jobs, anything
> complicated would need a more advanced app.  But for most cases simple
> is enough.
> =

> > 2) You have options (folders?)
> >  - scan mode: grayscale, color
> >  - resolution 50 100 150 300 600 1200 2400 4800 ...
> >  - source: flatbed, automatic document feeder, transparency unit, ...
> >  - how would you adjust gamma if available
> >  - contrast/light...
> =

> The only folders would probably be resolution, and one extra folder
> for the ADF if available.  The ADF would primarily be useful for PDFs,
> TIFFs, and OCR, so in that folder could be individual files for OCR,
> PDFs at various resolutions, and TIFFs at various resolutions.
> =

> Color vs. grayscale could have two images for the whole scan, so only
> one more file per resolution.  OCR would handle that automatically,
> and scanned photos are unlikely to be in grayscale.
> =

> Transparency units usually replace the main scan bed, so the could be
> detected as individual pictures and scanned that way.
> =

> Gamma, contrast, lightness, etc would require a standalone app.
> =

> > 3) Multipage scanning from ADF can not have a preview...
> =

> No, but this is true in a standalone app as well.
> =

> > For simple point and shoot it might work some of the time but I'm not s=
ure
> > the amount of bug reports for heuristics failures would be fun to go
> > through ;)
> The same bug reports would be needed for a standalone app, since it
> would be using the same defaults.
> =

> -Todd
> =

> >> Visit http://mail.kde.org/mailman/listinfo/kde-devel#unsub to unsubscr=
ibe
> >> <<

>> Visit http://mail.kde.org/mailman/listinfo/kde-devel#unsub to unsubscrib=
e <<
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