DLP3000: problem with projector calibration

Hi Shravani,

Hope you are following the instructions provided in this document http://www.ti.com/lit/ug/tidu985a/tidu985a.pdf 

Also for Webcam type system, please note you need to edit the config.txt in the application, look at page #26, Figure 3-1, camera_type = 0. Also when you run the step #3, camera calibration, you must see window with actual camera live feed appearing, if not then you must look at adjusting the camera settings exposure etc.. so that you can see clear video.

Regards,

Sanjeev

Hi Kyle,

Thanks for your reply. Unfortunately I do not have access to point grey camera and I am using Windows 10 operating system

Hi Sanjeev,

Yes, I am following the instructions provided in that document. I am getting the live feed- you can see that in the screenshots I have attached earlier query.I have made those changes you have suggested earlier itself(guide suggests so) else I wouldn't get live feed at all. This is the error message I receive while performing 'calibrate system'.  And the reasons listed here are not a problem because I have checked them and there is no glare , and all other conditions are satisfied... yet I don't understand why I am getting this error message. Also I made sure the feed that appears is almost similar to the pic that is showed in user guide, yet for some reasons it doesn't accept the pic and hence I can't proceed further. Please suggest accordingly

Hi Sanjeev,

That isn't a problem. I have tried whatever you suggested. But doesn't make a difference in hit rate. 

I have another doubt - shall I ask in same thread here or make another thread?

Doubt: The OpenCV camera I am using is compatible with the application and captures required images and gives point cloud as output. But my problem here is, the pics captured are of resolution 640x480, whereas my camera's resolution is 2592x1944 . I have checked all config files available, I couldn't find anywhere the option to modify camera's resolution. Can you guide me on this i.e changing camera's resolution from 640x480 to 2592x1944 or anything else I desire. I even tried to look at the files in source code available. but I got lost. Can you help me on this?

Thank You

Hi Sanjeev,

Thanks for your help regarding resolution, I could set my camera resolution. But I am still facing problems with projector calibration. 

Here is the link to video of projector calibration setup in my case. Please suggest accordingly. Thank You

drive.google.com/.../view

Hi Sanjeev,

Extremely sorry, couldn't update. Your suggestion didn't help me. But I could solve the problem by debugging the available source code. The following function 

projector_calib.RemovePrinted_AddProjectedBoard(camera_printed_board,projector_black,projector_camera_combo,&projector_pattern,&success);

I saved the images that are input to above function. Realized they weren't proper - maybe due to some delay with webcam while using it at 1280x720 resolution. Added delay and made sure that appropriate images are captured i.e white projection. no projection and combo projection images. And also verified, by saving the output image, which removes the projected from combo for further projector calibration. Whenever opencv's findchessboardcorners function doesn't find corners, it gives error. This implies now the code is fine , I just need to make sure to capture well focused images so that it can find corners.

So far this is what I have debugged. Since there is no trigger_in  and webcam's default resolution is 640x480, I am facing problem and adding some delay with trial &error , could just make it work.

Conclusion: Change Camera (as it is a fixed focus webcam with default resolution 640x480).  When new camera arrives, I shall try and let you know. 

Thank You

Kyle,

I was wondering if I could get help in buying camera. As per BOM for TIDA00361, FL3‐U3‐13Y3M is the part name. is the link to the part number mentioned. But nothing has been mentioned about lens' specifications been used. I would like to know the specs of lens been used by TI.

Thank You