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DLP4500: 3D scan setting point could problem

user6196831
Prodigy 30 points
Part Number: DLP4500

I Follow (http://www.ti.com/lit/ug/dlpu019b/dlpu019b.pdf) till page 50 

but my point could result was terrible,(all detail setting is same as user"s guide)please help me

 

  • 0
    TI__Prodigy 280 points

    Hi 

    Welcome to the DLP forum and thank you for your interest in DLP technology.

    We are looking into your question and will get back to you with more information.

    Thanks,

    Andrew

  • 0 in reply to Andrew Wallace1
    TI__Mastermind 30875 points

    Hi Andrew,

    Are you using the same camera as explained in the application note? What is the camera model and resolution? Does it have h/w trigger mode?

    Have you done proper Camera and Projector calibration? Please note once after calibration you shouldn't move the position of camera and proejctor. Also the captured image should be static. 

    Check the reprojection error is within the limit - say < 2 mentioned in Page #41 point number (10). 

    10. The calibration process estimates the lens focal length, focal point, lens distortion, and the translation and rotation of the camera relative to the calibration board. The calibration procedure will generate a reprojection error. Zero reprojection error is ideal, however an error below 2 should be adequate for typical usage. If the reprojection error is not satisfactory or if initial scans are not providing good results, run the camera calibration routine again.

     

    Also on page #51, the reason for the poor result is explained, make sure you take care of those.

    Regards,

    Sanjeev

  • 0 in reply to Sanjeev
    Prodigy 30 points

    thanks for responding 

    My camera model is FL3-U3-13S2C-CS

     I had done proper Camera and Projector calibration  my error is 1.2 it's within the limit 

    and i think my camera and projector are Synchronize and the gray code are nice

    i still can't find the problem.......

  • 0 in reply to user6196831
    TI__Mastermind 30875 points

    Hi,

    Can you increase the brightness of the projector? or Increase the camera aperture to make image look brigter? For projector brightness you can increase it by changing the brightness values

    http://www.ti.com/lit/ug/dlpu019b/dlpu019b.pdf Figure Figure 3-4. Projector Exposure Settings for Vertical and Horizontal Three-phase Scanning

    Can you just try one option? Horizontal scan or Vertical Scan alone,

    I.e Option 6 or Option 7

    Regards,
    Sanjeev

  • 0 in reply to Sanjeev
    Prodigy 30 points

    Hi~

    my  (Horizontal scan) and (Vertical Scan) is better than (Horizontal and Vertical Scan),

    but point could maps still can't be recognize as a piece of paper, 

    i had tried to change the brightness values but it's not helpful

    i can't figure out what may be the problem...

  • 0 in reply to user6196831
    TI__Mastermind 30875 points

    Hi,

    I suggest you increase the LED_CURRENT futher - looks like you changed from 200,200,200 to 50,50,50. Can you try other way, 300,300,300.

    Regards,

    SAnjeev