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Compiler/DLP4500: DLP 4500 projector calibration not found

Prodigy 45 points

Replies: 8

Views: 179

Part Number: DLP4500

Tool/software: TI C/C++ Compiler

Hello

I'm trying to make point cloud with DLP4500 through the High-Resolution 3D Scanner for Factory Automation Using DLP® Technology user guide.

The problem is that I keep failing to find the projector calibration board as below figure.

I don't know how to pass this stage.

Thanks.

  • Hi Song Jungmin,

    Welcome to TI E2E forums and thanks for showing interest in the DLP technology. 

    Our expert will look into your query and get back to you soon.

    Thanks and regards,

    Mayank

  • In reply to Mayank Khandelwal:

    Hi Song, 

    Kindly give us some more time, we are contacting the concerned experts. Thanks for your patience!

    Thanks & Regards
    Hirak.

    Thanks & Regards,
    Hirak.

     

    If a post answers your question, please click on "Verify Answer" button

  • In reply to Hirak Biswas:

    Hi Song,

    I see two issues here -

    1. Can you adjust the camera aperture? it looked too white and washed out

    2. Also in the captured image checkerboard is not continuous, it has spaces

    Refer to section 3.7 http://www.ti.com/lit/ug/dlpu019b/dlpu019b.pdf?ts=1590387214130

    Regards,
    Sanjeev 

    If a post answers your question, please click on "Verify Answer" button

  • In reply to Sanjeev:

    Hi Sanjeev. 

    Thank you for your kind and fast reply.

    1. I already tried with various amount of camera aperture. It does not seem to be a problem

    2. That image is a sample image automatically generated after 3rd or 2nd stage of your program. 

    The below figure shows the chessboard I used. Do I have to reprint it in more dark color?

    From your advice, I think the problem is related to the camera setting and clearness of the target, not technical missing.

    Am I understand it clearly?

    Thank you

    Song

  • In reply to Song Jungmin:

    Song,

    Yes, printing a little dark image can help. And also as I mentioned you can look closely at the camera view and verify that there are no gaps between the checkerboard.

    I am pretty sure it is related to camera setting and printed chessboard. This software is being used by many users. I also recommend you searching the TI E2E forum on this topic.

    Regards,

    Sanjeev

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  • In reply to Sanjeev:

    Hi Sanjeev

    This is Song.

    I followed your instructions, still have trouble, though. 

    I printed new chessboard with dark color. Also tried with different aperture and position of the camera.

    Sorry for bothering you again, but i need your help. Could you give me another tip to solve this problem. 

    Detail example about camera position or something. 

    Regard

    Song

  • In reply to Song Jungmin:

    Hi Sanjeev

    This is Song. 

    I solved the issue. So i closed it. 

    The main reason is about config setting. I changed the config projector and camera both. 

    As you mention before, the brightness in DLP was too high, so I changed the projector config.

    Thank you for helping me. 

    Best Regard

    Song

  • In reply to Song Jungmin:

    Hi Song,

    Okay. Sure no problem.

    Regards,

    Sanjeev

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