Meaning of output or processing latency

Question

What is output or processing latency?

Answer

Processing latency is the time from the start of camera exposure of the profile or last profile of the surface, to the time of the last frame which causes the scan to be emitted from the generation engine. In the case of long exposure time, the time is measured from the start of the exposure (profiles and surfaces). For multiple exposures it includes the summation of the individual exposure times (profiles and surfaces)."

https://d3ejaiy6gq5z4s.cloudfront.net/manuals/gocator/gocator-6.1/G2/Default.htm#Protocols/GocatorProtocol/HealthResults.htm?Highlight=processing%20latency

"Scan to be emitted from the generation engine"; the former is referring to the data is ready for output (stamp, surface, measurements, etc.). There is sequential mode vs simultaneous / parallel mode in processing that also comes in to play; it is linked to how big the frames are.

Sequential processing: processing of one frame all finishes before the next frame. In this case, it should be easy to find out how processing latency is affected by measurement tools (or whether it is affected by the measurement tools)

Simultaneous/parallel processing (happens for shorter frame lengths and very high scan speeds): the time spent on data processing in this case would affect 3d data generation of the next frame, hence has more effect on the processing latency that would be reported.