What is Glass to Glass Latency?

There are three major factors that contribute to the latency of the camera when measuring glass to glass latency:

• Camera

• V4L2 layer/application layer

• Display

 

More details regarding the camera part:

 

• The latency of the data stream depends upon the resolution, framerate and exposure settings of the camera. For example, the higher resolutions will have higher latency compared to lower resolutions.

• At faster framerates, the readout time from the camera is reduced which also contributes to lower latency.

• The general rule of thumb for expected latency from a MIPI camera is 3-4 times of the current frame time.

Ref: https://www.e-consystems.com/

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