[GTALUG] CZUR scanners under Linux

[D. Hugh Redelmeier via talk]

We bought a CZUR ET24 Pro.  Quite a bit more expensive than other models.  
It claimed that it would support Linux.


I installed the supplied-to-me RPM using "rpm --force".  It seems to work.
(I only scanned the junk on the desktop where the scanning mat will go.)

| From: Kevin Cozens via talk 

| If it helps I found a page from two years ago where some asked about using a
| CZUR scanner. That page said they had installed and ran the Windows software
| using Wine but the driver was still an issue.

Right.  If it worked, that might be the best way.

Apparently the scan under MacOS (and probably under Windows) 
has better OCR than under Linux.  Grr.  At least if Stephen 
Wilkinson's review on the product page is correct.

| That page pointed to a web page
| from four years earlier that said it is a UVC device.

We have earlier CZUR scanners which are UVC at a lower resolution than the 
proprietary scanning software sees.

| The scanner has no support in XSane?

Not that I've seen.

| Is there any support for it in VueScan?

I don't know VueScan.

| From: Lennart Sorensen via talk 
| Subject: Re: [GTALUG] Borked Python setup, please help

| I see people claiming many CZUR scaners are just UVC devices, and that
| there exists programs that can capture from that, like guvcview and a
| few others.  It strangely does sound like it is actually more of a video
| camera than a scanner.

They are visible as UVC, but I think that the full resolution isn't what a 
UVC driver sees.  I have not tested this particular model.

The other thing is that CZUR has put a lot of effort into optimizing the 
scanning process.  Perhaps some of that also exists in mobile phone camera 
scanner apps.

- puts red reference lines (from LEDs) on the page to figure out and 
  correct for page curvature

- (optionally) combines scanning and OCR

- a workflow to speed up multipage scanning

- little tools to put on your finger to hold down page edges.  The 
  software edits these out of the picture.

- quite good resolution for the task

- various lights to try to avoid glare.

| Maybe your model is something else?

This model claimed Linux support.  We had an earlier one that we liked but 
we didn't like having to boot Windows and later having to ship the result 
to the Linux machine.  Every step in the workflow is a tax.

We'll see if the Linux software is good enough.  Eventually.
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Re: [GTALUG] CZUR scanners (was Borked Python setup, please help)

[Kevin Cozens via talk]

On 2022-11-09 16:00, Lennart Sorensen via talk wrote:

On Wed, Nov 09, 2022 at 12:04:44PM -0500, D. Hugh Redelmeier via talk wrote:

I recently bought a scanner from CZUR because it was to support Linux.
Well, they only supplied a binary .deb package.

[snip]

This solution is going to suffer bit-rot.  It was a mistake thinking that
this scanner supports Linux in a meaningful way.


I see people claiming many CZUR scaners are just UVC devices, and that
there exists programs that can capture from that, like guvcview and a
few others.


If it helps I found a page from two years ago where some asked about using a 
CZUR scanner. That page said they had installed and ran the Windows software 
using Wine but the driver was still an issue. That page pointed to a web 
page from four years earlier that said it is a UVC device. That page has 
some information about using the scanner. If it helps, the page is at:

http://www.johnwillis.com/2016/04/czur-scannerscanning-with-linux.html

The scanner has no support in XSane? Is there any support for it in VueScan?

--
Cheers!

Kevin.

http://www.ve3syb.ca/   | "Nerds make the shiny things that
https://www.patreon.com/KevinCozens | distract the mouth-breathers, and
| that's why we're powerful"
Owner of Elecraft K2 #2172  |
#include  | --Chris Hardwick

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Re: [GTALUG] Borked Python setup, please help

[Tim Tisdall via talk]

The OS has python needs and your app has its own. It's usually best to keep
those things independent to avoid dependency conflicts.  Using something
like virtualenv or pyenv to create a separate python environment and then
using the pip in it to install dependencies works well.
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Re: [GTALUG] Borked Python setup, please help

[Lennart Sorensen via talk]

On Wed, Nov 09, 2022 at 12:04:44PM -0500, D. Hugh Redelmeier via talk wrote:
> If I had to guess, Evan's problem (the one that started this thread) stems 
> from a software package that hasn't been updated in some time and no 
> longer matches what the distro provides.
> 
> Packages bit-rot.  One can do things to reduce this effect but it can 
> hardly be eliminated.
> 
> Sometimes a package is smart enough to refuse to install when its 
> requrements are not met.  But users aren't happy.  How many screw-heads 
> have been mangled my impatient users with to wrong screwdriver?
> 
> Speaking of bit-rot, ...
> 
> I recently bought a scanner from CZUR because it was to support Linux.  
> Well, they only supplied a binary .deb package.  This is a problem:
> - .deb won't work on my Fedora system
> - "alien" won't turn it into a .rpm
> - after a few queries, CZUR support sent me an RPM
> - the RPM elicits error from dnf on my system
> - CZUR support says to use "dnf --force".  I haven't tried yet.
> 
> This solution is going to suffer bit-rot.  It was a mistake thinking that 
> this scanner supports Linux in a meaningful way.

I see people claiming many CZUR scaners are just UVC devices, and that
there exists programs that can capture from that, like guvcview and a
few others.  It strangely does sound like it is actually more of a video
camera than a scanner.

Maybe your model is something else?

-- 
Len Sorensen
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Re: [GTALUG] Borked Python setup, please help

[D. Hugh Redelmeier via talk]

| From: Lennart Sorensen via talk 

| Well as far as I can tell every major linux distribution has got it right,
| and the issue mainly seems to happen on windows where apparently people
| can't get anything right.

If I had to guess, Evan's problem (the one that started this thread) stems 
from a software package that hasn't been updated in some time and no 
longer matches what the distro provides.

Packages bit-rot.  One can do things to reduce this effect but it can 
hardly be eliminated.

Sometimes a package is smart enough to refuse to install when its 
requrements are not met.  But users aren't happy.  How many screw-heads 
have been mangled my impatient users with to wrong screwdriver?

Speaking of bit-rot, ...

I recently bought a scanner from CZUR because it was to support Linux.  
Well, they only supplied a binary .deb package.  This is a problem:
- .deb won't work on my Fedora system
- "alien" won't turn it into a .rpm
- after a few queries, CZUR support sent me an RPM
- the RPM elicits error from dnf on my system
- CZUR support says to use "dnf --force".  I haven't tried yet.

This solution is going to suffer bit-rot.  It was a mistake thinking that 
this scanner supports Linux in a meaningful way.
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