Alignment Issue of Hand-Held Scanner

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    Götz Echtenacher

    Hi Abanob,

    did you include color information? Because RC needs this to align images and scan...

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    Abanob

    yes i have coloured-order point cloud with .PTX extention

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    Götz Echtenacher

    Can you see your stations (little cubes) in the component with the laserscans?

    Could you include some screenshots?

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    Abanob

    yes i can see the stations and everything seems pretty normal , even after i use control points as u see in these screenshot it wouldnt even show me the amount of error and just gives me ' ---' as it appears in the second screen shot

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    Götz Echtenacher

    Hey Abanob,

    the --- simply means that the image is not registered in the currently active component.

    As for handheld scanners, I have speculated that it will not work with RC here:

    https://support.capturingreality.com/hc/en-us/community/posts/115001813332-Problems-with-the-import-of-laser-scan-data

    I wasn't sure if you and Bodo were the same person...  :-)

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    Abanob

    Dear Gotz ,

    i would like to inform you that it worked out for me , it was a problem with the inputs as they weren't sufficient, i am glad to let you know that RC works with HandHeld scanner i am not sure if it will with all the brands out there but it worked with mine, 

    The following is a Model generated from a HandHeld Scanner only as i disabled meshing from images.
    As per the other issue with the other guy u thought it was me(Bodo) , i think the problem with him is the colours as it's vital for RC alignment.

     

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    Götz Echtenacher

    Hi Abanob,

    thanks a lot for reporting and even good news!

    Do you mean you used not enough images or the scanned area was too small?

    Could you send a screenshot where one can see the scan-cube in relation to the scanned object?

    I wonder how RC determines a station since there is none with a handheld scanner.

    Maybe it worked in your case because your geometry is limited to a small part so there are basically no obstructed surfaces. With Bodo it was a whole building so there was a lot of obstruction going on...

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    Abanob

    Dear Gotz, 

    both scanned area and inputs were small , and the way RC determined the Station of the hand held, it through a 3rd party software where i converted the Hand-Held Scan into an Ordered Scan, with colours .

    and as i said , i really think that bodo's problem is due to colours absence , it would mess up alignment just because difference in colours .

    here is a screen shot of the station for the Hand-Held Scanner 

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    Götz Echtenacher

    Hi Abanob,

    ah, thanks for clearing that up. I understand now what Ordered Scan means.

    Without going into too much detail, could you give me a name for the software you used?

    I agree with you that the missing colors are preventing bodos model from being aligned. But looking at the sample image he provided of his scan, I would not be surprised if it would not work even with colors. In "normal" oriented scans, these images show exactly what the scanner "saw" from each station. It's basically a 360° image in the shape of a cube. So if you would convert a complex model into an Oriented Scan, you would have to create many stations (if that is possible) so that there are no self-obscuring surfaces. And even if one would manage to do that, it adds a lot of work figuring out where to place them.

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