DLPDLCR3010EVM-G2: How to calculate the effective resolution

Francesco Leacche

Part Number: DLPDLCR3010EVM-G2
Other Parts Discussed in Thread: DLP4500, DLP3010EVM-LC

Hello everyone,

I want to build a 3D scanning system using the hardware I have available: a DLP LightCrafter Display 3010EVM-G2 (1280x720 resolution) and a 2D CMOS industrial camera (2592x1944 resolution).

I am totally new to this and I was going through the basics following this TI tutorial https://training.ti.com/how-select-resolution-and-configuration-3d-machine-vision-applications?cu=1127611 . At the minute 2:30 it introduces how to calculate the effective resolution of the system.

In the video he has a DLP4500 with a resolution of 912x1440 and a 2048x2048 camera. Of course I get the difference in the aspect ratio, but I don't get why he multiplies the 2048 pixels * 60%.

Where does the 60% comes out from?

over 6 years ago

0 Kyle Rakos over 6 years ago

TI__Mastermind 20045 points

Hello Franesco,

I think this is due to the fact that not 100% of the camera pixels will result in a 3D point in the resulting scan. This would be highly algorithm and optical dependent.

Note that instead of the DLP3010EVM-G2 I would recommend the DLP3010EVM-LC. It uses the same DMD but has a controller that is intended for Light Control applications such as 3D scanning. In either case you will be required to implement your own algorithm and camera control.

Thanks,

Kyle

0 Brandon Seiser over 6 years ago

TI__Intellectual 1825 points

Hi Francesco,

Thank you for your post and interest in DLP products.

The 60% is used as approximate fill factor of the DMD resolution laid over the camera sensor resolution. In the video example, the camera sensor is a square and the DMD is a rectangle. In that example, the entire DMD is used, so the camera sensor cannot use all of the pixels. This number will change depending on your DMD and camera sensor and the configuration you use.

Thanks,

Brandon

0 Francesco Leacche over 6 years ago in reply to Kyle Rakos

Prodigy 20 points

Hello Kyle,

Thanks for the reply. Unfortunately I have the G2 already available and I think I will have to stick with it. Do you think it will be too limiting? What's the main difference? The absence of input/output triggers to synchronize with the camera?

0 Kyle Rakos over 6 years ago in reply to Francesco Leacche

TI__Mastermind 20045 points

Hello Francesco,

Please take a look at the FAQ: "What is difference between Display and Light Control EVMs? Which is suited for my application?"

Thanks,

Kyle

DLP®︎ products

DLP products forum

DLPDLCR3010EVM-G2: How to calculate the effective resolution