DLPLCR4500EVM: Add 8 bit fringe pattern to pattern sequence

Hello John,

Yes, your four steps sound correct. As for your questions:

1. Could you confirm what training videos and what GUI version you are using? I believe the training videos may have been made before the latest GUI update.
2. Do you want to sync the images with an external trigger? Or do you want them to run automatically at a given framerate.
3. So far sounds like this is the correct approach. Let me know about how you are trying to sync the images with the camera though.
4. You can try to use the GUI on Windows 10. Some of our customers have been having difficulties though related to the GUI on Windows 10. Last time I used the GUI it did work on Winodws 10. So your results may vary.


Thanks,
Kyle

Hi Kyle,

Thanks for the feedback so far.

This is an experiment we are trying to perform based upon fringe projection and extracting 3D point cloud from the images.

To keep it relatively simple we were going to trigger the camera capture manually so we were hoping to show each of the images for a period of time ( say 3s each frame)  and snap a camera image during the 3s interval. We can automate the process at a later stage

The GUI version is 3.1. I found an updated training video that resembles more the GUI that is in 3.1 but I am still a little unclear of the following.  

How do I show the fringe pattern once it’s uploaded as part of the 24 bit image?  I couldn’t see from the video how you would show an image like I have attached. It showed more how to show red green and blue patterns.

Hope this helps clarify but let me know if you need more detail

Thanks

John

Hi Kyle,

I forgot to add the link the training video I was looking at. Like I said I think the difficulty we are having is how to 'play' our image pattern once we upload it. We will have 12 in total we need to sequence through

Thanks in advance

John

https://www.youtube.com/watch?v=Igw9I877kAM

Hi Kyle,

Sorry for nagging you. Any luck in figuring out my question on how to display the fringe patterns on the 4500? I'm under pressure here in work to get this resolved.

Thanks in advance

John

Hi Kyle,

I managed to upload and pull out the images from the firmware over the weekend. One last area I am struggling on.

Based upon the image above which is 912 x 1140 how do I modify this to take into account the unique diamond configuration of the 4500? 

If I don't alter it and leave it as it currently stands what artifacts will I see for my given image after it is projected through the 4500?

Thanks in advance

John

Hi Kyle,

Still a little confused on this one. In some of the posts you highlighted above it says I would need to alter the image and in another it says I can directly upload the 912 x 1140 pattern and it will just work.

Saying that I have uploaded the pattern as 912 x 1140 and it looks OK when I display it bar the the image seems to be banding.

See this image

Is this related to the post I have linked below? I get the same problems when I display the internal pattern ramp. Any ideas?

https://e2e.ti.com/support/dlp/f/94/p/168279/618397

Thanks

John

Hi Kyle,

I understand now. Just on that last question I had. Any ideas on the banding? I can't seem to get a linear horizontal ramp using the internal pattern or a pattern sequence that I create myself.

Thanks in advance

John