Fig. 2.

Data processing flowchart of the OCT system. Solid arrows: data stream, blue indicates internal GPU or Host data flow red indicates GPU-host data flow; here the entire GPU memory buffers were allocated on global memory. Thread 1 boxed by green controls the OCT data acquisition; thread 2 boxed by yellow controls the GPU1 data processing and galvanometer mirrors; thread 3 boxed by red controls the GPU2 volume rendering processing. Synchronization and hand-shake between threads are realized through a software event-based trigger.