What types of on-camera image processing modes are supported on OptiTrack cameras, and for what application would each be used?

OptiTrack cameras can send a variety of pre-processed image types to your PC, each of which offers a different combination of 2D object information and bandwidth. Image processing types include:

• Object - Performs on-camera detection of marker location, size, and roundness using our most precise grayscale processing methods. Provides excellent precision with the smallest CPU footprint. Generally, we recommend using the object mode over precision mode or segment mode. 

Note: Flex 3, V120:Slim, V120:Duo/Trio cameras utilize a different Object mode than other OptiTrack cameras. This alternate Object mode delivers less precise 2D information when compared to Precision mode.

• Precision - Similar to object processing, but sends selective grayscale images of markers to the PC for calculation of object data. The Precision mode provides the most verbose marker information, but requires more CPU resources than object processing. 

• Segment - Like precision grayscale processing, segment mode divides processing between the camera and CPU, providing streamlined marker information for CPU-efficient marker detection. Provides a balance between precision and processsing load. We recommend using the object mode over the percision mode, if available. 

• MJPEG-compressed grayscale - Full frame grayscale images, compressed on-camera for scalable video. Used primarily for reference videos. 

• Raw grayscale - Full resolution, uncompressed grayscale delivered at a reduced frame rate, as restricted by the bandwidth. Used primarily for aiming purpose.

Refer to the camera's technical specifications to determine which image processing modes it supports.

For most motion capture applications, Precision mode is recommended for systems with up to 24 cameras, and Object mode is recommended for systems with 25+ cameras. MJPEG-compressed grayscale is recommended for cameras operating as reference video, while Raw grayscale is recommended during focusing and aiming.