Scan talk.

[rodney]

I am seeking a scanner that has software that will
identify say 30 images on the bed ( selected by the operator)
, and scan each individually at 600dpi.

Looking at Canon LiDE 600f it states.........

"Scan multiple images at once using the Multi-Scan function. Single-pass
Multi-Scan automatically aligns images and saves each image as a separate
file."

I am presuming it does just one pass, then isolates the images
and saves each as a file. (not what I am after)

If this is so, what should I be looking for? "multi marqee" perhaps?

 

[CSM1]

I am seeking a scanner that has software that will
identify say 30 images on the bed ( selected by the operator)
, and scan each individually at 600dpi.

Looking at Canon LiDE 600f it states.........

"Scan multiple images at once using the Multi-Scan function. Single-pass
Multi-Scan automatically aligns images and saves each image as a separate
file."

I am presuming it does just one pass, then isolates the images
and saves each as a file. (not what I am after)

You presume incorrectly.

Cannon does a preview and identifies each image. Then Scans each one in turn
(Makes multiple scans). Saving the files as it goes.

The preview must be performed to identify each image and the position on the
bed.

 

[rodney]

Cheers CSM1,
you solved one problem, and in doing so, created another.

Being as scanners have no purchase "safety net"
one needs to know exactly as they may perform.

I scan postage stamps, and my fear is now, whether Cannon's ID
would be sophisticated enough to identify the perforations
outside of the image proper.

I have used Epson 1670 perfection prior to this, and one could
"marquee" the desired area to be scanned around each stamp,
before kicking the scanner into action.
It performed well, it scanned approx 95,000 postage stamps before
the cold bulb began having issues.
Rod.


"CSM1"

 

[CSM1]

I don't have a Canon Lide 600, but I do have a Canon Canoscan 8400F.

As far as I know you can always re-position the marquee.

I would not recommend the Lide series of Canon scanners for scanning postage
stamps.

The Lide series are CIS sensors, CIS sensors don't have any depth of field.
I would choose one the CanoScan series instead.

Example of CIS vs CCD.
http://www.carlmcmillan.com/DOF/DepthofField.htm

My choice would be the CanoScan 8800F today.

You can download manuals for the scanner you are interested in from Canon.
http://www.usa.canon.com/consumer/controller?act=SupportIndexAct

Most of the manuals are in HTML format. Which is less than idea.

Your Epson 1670 perfection is a CCD sensor.

 

[rodney]

Marvelous Carl
I was recomended an LiDE, so I appreciate your "heads up"
You saved me some money.
I'll be off and kick some tyres on the Canoscans.
Very much appreciated.
Rod.

 

[rodney]

"Bennett Price" >>

Why is depth of field a need for postage stamps? What could be flatter?

I would echo Carl's comments,
we have this thing in stamp collecting called "fly specking"
I like my stamps so I can see the individual hairs on the
perforations.
Hence Carl's advice was pertinent and saved me purchasing
a model I would have been unhappy with.

 

[CSM1]

| www.carlmcmillan.com
| --
| | > CSM1 wrote:
| >> I don't have a Canon Lide 600, but I do have a Canon Canoscan 8400F.
| >>
| >> As far as I know you can always re-position the marquee.
| >>
| >> I would not recommend the Lide series of Canon scanners for scanning
| >> postage stamps.
| >>
| >> The Lide series are CIS sensors, CIS sensors don't have any depth of
| >> field.
| >> I would choose one the CanoScan series instead.
| >>
| >> Example of CIS vs CCD.
| >> http://www.carlmcmillan.com/DOF/DepthofField.htm
| >>
| >> My choice would be the CanoScan 8800F today.
| >>
| >> You can download manuals for the scanner you are interested in from
| >> Canon.
| >> http://www.usa.canon.com/consumer/controller?act=SupportIndexAct
| >>
| >> Most of the manuals are in HTML format. Which is less than idea.
| >>
| >> Your Epson 1670 perfection is a CCD sensor.
| >>
| > Why is depth of field a need for postage stamps? What could be
flatter?
|
| You may not need great depth of field for postage stamps.
|
| But none-the-less CCD sensors have better images that are correctly
focused
| and they have a lens in the system.
|
| CIS sensors don't have any optical components at all.
| C stands for Contact. I is Image, S is Sensor.
|
| Contact as in touching.
| Since in a scanner, the sensor is not actually touching the object (it
is
| separated by a layer of glass), the focus is not as sharp.
|
| --
| CSM1
| http://
|
This depth of field aspect is interesting.
Not something I would have given any consideration as I mostly scan flat
document type things.
I appreciate [now] how that might be associated with a better scanner or
potentially produce better scans.
Is the "depth" typically something adjustable as with the aperture in an
SLR
camera?
Thx.
Geo.

Not adjustable. Depth of field in a scanner is the result of the physical
design of the scanner.
CCD sensors have good depth of field because of the lens in the system.
CCD scanners have fixed aperture and fixed focal distance. (We hope the
sharp focus is at the surface of the glass).

Depth of field is very simple, the area of an image that is in acceptable
focus, near distance to far distance.

In the case of a scanner it is the height above the glass that can produce
an acceptable image.

Depth of field
http://en.wikipedia.org/wiki/Depth_of_field

 

[Phil Ardussi]

Might I suggest, where focus is a problem, editing in Picasa and using their
"sharpen" tool. It can be breathtaking in certain situations. It's free and
is worth looking at.

 

[rodney]

Yes, I have Picasa Phil,
yet I have never messed around with the sharpen tool,
didn't know it existed.

Picasa is absolutely brilliant for what I need,
that is, a free orientation tool option.

Postage stamp often do not have the image proper
relating to the perforations, so the ability to tweak
the orientation is a necessity.
A slick piece of software, however do not like the
"backup" of all images it creates.

 

[CSM1]

My UMAX Astra 2100U has died (left it plugged in too long), so I'm in
the market for another scanner.
The NewEgg site customer reviews for the Canon Canoscan8400F you
recommend mention a dust problem inside the glass. User IrishPirate
states that he cleans the 'platen' with alcohol and a cloth and
'problem solved'.
http://www.newegg.com/Product/Produ...eoOnlyMark=False&VendorMark=&Page=1&Keywords=
I know what a typewriter 'platen' is. It's the large rubber roller
that moves your typing paper. I don't know what a 'platen' is on a
scanner. Or how to access it. I perused the manual that you steered me
to, but don't see anything in the 'Troubleshooting' about cleaning a
platen. Would this be unauthorized maintenance? How would you access
the 'platen'?

The platen is the glass that you lay the document on to scan.

The Canon model 8400F has been replaced with model 8800F.
http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&fcategoryid=120&modelid=15561

Newegg:
http://www.newegg.com/Product/Product.aspx?Item=N82E16838111015

All scanners can get dust inside. They are not sealed.

Don't smoke in the room where you have a scanner, the tobacco smoke will
coat the inside of the scanner.

As to how to access the underside of the platen, you take the scanner apart
and clean the glass.
http://www.carlmcmillan.com/CanonScanner/Canon.htm