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canon EOS D70 & David 3.10.4 problem

Problems, solutions and discussion about scanning with a video projector and stripe patterns.

canon EOS D70 & David 3.10.4 problem

Postby Cedric » Mon Sep 07, 2015 6:12 pm

Hello,
I am setting up a scanner solution based on a canon D70 and David 3.10.4.
My operating system is windows10.
If I use my previous webcam, David is working fine.
If I try to use the canon D70, I am able to find it in the selection list, but once selected, the camera display the horizontal leveling help, blink and come back to the original computer icon, liveview do not start.
on the pc, nothing happen,.
I am not using the 64bit, only the 32bit.

Do you have a solution to solve this?

Best regards

cedric
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Re: canon EOS D70 & David 3.10.4 problem

Postby stefanb » Mon Sep 07, 2015 8:40 pm

Hi cedric,

manual mode (M) selected on D70?

regards
S.
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Re: canon EOS D70 & David 3.10.4 problem

Postby Curiousjeff » Mon Sep 07, 2015 10:39 pm

Do you have Canon EDSDK.dll version 2.14.0.3 or later installed in the David directory ?

Can you try it on another computer with Windows 7 or 8 ?

Can you see the "liveview" from the D70 with Canon EOS utility on that computer ?

Jeff
Panasonic GH4 4K with lens 12-35, Inogeni 4K to USB3 hdmi capture device, projectors: Acer K135/Acer K11/NEC V260X, Canon 60D, macro 60 mm, MagicLantern
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Re: canon EOS D70 & David 3.10.4 problem

Postby Cedric » Tue Sep 08, 2015 8:06 am

dear all,

yes the camera what in manual mode :)

I finally solve the problem, It was the EDSDK.dll version.
The original one was too old to support D70.
It work fine now.

I just have to borrow a projector for a try before to buy one.

Do you thing that a full HD could work better (due to the higher resolution) than a standard HD, Especially if I want to use the high resolution of the camera?

thanks a lot for your support

Cedric
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Re: canon EOS D70 & David 3.10.4 problem

Postby Curiousjeff » Tue Sep 08, 2015 8:20 am

Unfortunately, for the moment, there is no side by side comparison of using various projectors with different native resolutions (I am curious what would be the result with a 4k projector. They are very expensive now but in a few years...).

Narmella uses his Letscan software to "grab" images with his Canon camera using a standard projector. The quality is very high.

It seems that up to a point, the increase in camera resolution is more important then the increase in projector resolution.

Also, it's not easy to find an HD projector with a short throw.

It's also easier to find used standard HD projectors on Ebay at low cost.

Jeff
Panasonic GH4 4K with lens 12-35, Inogeni 4K to USB3 hdmi capture device, projectors: Acer K135/Acer K11/NEC V260X, Canon 60D, macro 60 mm, MagicLantern
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Re: canon EOS D70 & David 3.10.4 problem

Postby Curiousjeff » Tue Sep 08, 2015 8:24 am

Beware:

When using Canon in liveview, your are limited to the liveview resolution of the camera:

960x640 pixels for the Canon 70D

You CANNOT use the Full HD resolution of the video mode.
Panasonic GH4 4K with lens 12-35, Inogeni 4K to USB3 hdmi capture device, projectors: Acer K135/Acer K11/NEC V260X, Canon 60D, macro 60 mm, MagicLantern
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Re: canon EOS D70 & David 3.10.4 problem

Postby Cedric » Tue Sep 08, 2015 8:52 am

Hi Jeff,

I saw that live view resolution is limited ( it is worse than my modified web cam :D )
But the idea what to use letscan to grab pictures and send them in David.

when you say "You CANNOT use the Full HD resolution of the video mode", are you taking about the video projector or the camera?

regards

cedric
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Re: canon EOS D70 & David 3.10.4 problem

Postby Curiousjeff » Tue Sep 08, 2015 9:14 am

I was talking about the full hd video resolution of the Canon camera.

Image grabber is a very slow and tedious process.

Narmella's software makes it easier but it is still much slower then the liveview / webcam approach.

If you need incredible details and high precision, it will help you get there, but before I would start using the "regular" method.

Have a look at the scans from Christian Mendes in this forum using a webcam.

Jeff
Panasonic GH4 4K with lens 12-35, Inogeni 4K to USB3 hdmi capture device, projectors: Acer K135/Acer K11/NEC V260X, Canon 60D, macro 60 mm, MagicLantern
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Re: canon EOS D70 & David 3.10.4 problem

Postby Cedric » Tue Sep 08, 2015 2:49 pm

HI jeff,

I still have a question:
Why is better to have a short throw projector?
is it useful to be able to project the 2 meter diagonal light frames at 0.5 meter or 1 meter distance (between projector and the object)?
especially is your object is less than 1 meter size?

thank for your help

cedric
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Re: canon EOS D70 & David 3.10.4 problem

Postby NARMELLA » Tue Sep 08, 2015 2:57 pm

Hi Jeff

To use which resolution of camera or data projector ; We have to have some information about the patterns that those are using by david laser scanner.

As i wrote it before i want to show those images here too :

Resolution of images : 720 x 480
Resolution of data projector : 800 x 600
LSCO0011.png
LSCO0011.png (81.93 KiB) Viewed 7083 times


Resolution of images : 1920 x 1280
Resolution of data projector : 800 x 600
LSCO0022.png
LSCO0022.png (91.05 KiB) Viewed 7083 times



Resolution of images : 2592 x 1728
Resolution of data projector : 800 x 600
LSCO0033.png
LSCO0033.png (98.35 KiB) Viewed 7083 times


And as you can see ; The second image is the good one
Data projector : NEC VE 281
Camera(s) : Canon eos 600D (3x)
Software : Lets scan 2.5 + David laser scanner 3.9
گشتاور صنعت تبریز
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Re: canon EOS D70 & David 3.10.4 problem

Postby NARMELLA » Tue Sep 08, 2015 3:08 pm

And take a look to these images :

The first one created using 11 images ( patterns ) and The second created using 12 images ( patterns ).

Only by using one more pattern :

CAL0022.png

CAL0033.png


I have created my own patterns ( in lets scan ) and i am testing and the results varies ( I will add more information later )

Its so difficult to introduce a good resolution for camera or data projector ( Until now )

NARMELLA
Data projector : NEC VE 281
Camera(s) : Canon eos 600D (3x)
Software : Lets scan 2.5 + David laser scanner 3.9
گشتاور صنعت تبریز
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Re: canon EOS D70 & David 3.10.4 problem

Postby Curiousjeff » Tue Sep 08, 2015 10:40 pm

Cedric:

Forget what I wrote about "short throw".

The projector must display a focused image that fits the calibration panel you want to use.

Many use calibration panel of 60, 120, 240 mm.

Roughly, your image diagonal should then start at 200 mm.

Otherwise, you will need to do something to the lens of the projector.

Narmella :

Actually, I prefer the third image, it's sharper, more detailed. Just need to find a way to get rid of the artifacts.

In just a few years anyway, we will all have 4k projector and camera :)
Panasonic GH4 4K with lens 12-35, Inogeni 4K to USB3 hdmi capture device, projectors: Acer K135/Acer K11/NEC V260X, Canon 60D, macro 60 mm, MagicLantern
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