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TDA4VM: Does the projection matrix in the Auto Valet Parking demos match the cameras?

John H. Gardner
Guru 52181 points
Part Number: TDA4VM

Subject line contains the question the singular question from the customer.

John

  • +1
    TI__Genius 10355 points

    No they don't. The sample matrix provided is tuned to IMX390 2MP camera with a down_sample factor of 8. The AVP demo cameras had a different projection matrix.

    Regards,
    Shyam

  • 0 in reply to Shyam Jagannathan
    Intellectual 880 points

    Hello Shyam,

        The AVP4 demo which uses 4 cameras comprises of IMX390 2MP cameras.If we are using IMX390 cameras can we resuse the projection matrix provided in the SDK to arrive at homography matrix for perspective transformation?

    Best Regards,

    Vijay

  • 0 in reply to Vijay Krishnan
    TI__Guru**** 477995 points

    Hi Vijay,

    Do you mean LDC loopup table? then yes, if you are using same D3 camera, you could reuse LDC Lut.

    Rgds,

    Brijesh

  • 0 in reply to Brijesh Jadav
    Intellectual 880 points

    Hello Brijesh,

         Thank you for the information.No I am talking about the projection matrix in Valet Parking .Please find the code below:

    double ValetApp_projection_matrix[12] = {
    -0.0370342771198098, 0.851584581647000, 1.040238195886740, 0.0,
    -0.3706994351336200, 1.386872073055660, 0.989116628168284, 0.0,
    -0.00000624740230713446, 0.000254219649153303, 0.000182713676343543, 0.0};

    The above matrix is present in projection_mat.c of app_valet_parking of ptk demo.Can I resue this matrix for my Sony IMX390 Camera(D3 is the manufacturer).

    Best Regards,

    Vijay

  • 0
    TI__Expert 3040 points

    Vijay,

    No, ValetApp_projection_matrix is for the 1MP camera that we used to collect our data set and it is from our specific camera setup (mounting position and camera angle) on a vehicle. So it won't work for your camera and your setup. 

    Best regards,

    Do-Kyoung