A security camera company wishes to add a face recognition feature to their came

Question

A security camera company wishes to add a face recognition feature to their cameras such that the camera only broadcasts video when a human face is detected in the video. The camera records 30 video frames per second. For each frame, the camera would execute a face recognition application. The application implemented on a microprocessor requires 50 ms. The application implemented as a custom digital circuit requires 1 ms. Compute the maximum number of frames per second that each implementation supports, and indicate which implementation is sufficient for 30 frames per second.

Explanation / Answer

for a micro processor,

since it takes 50ms/frame

total number o frames face recognized in 1 sec=1/50m =20frames /sec.<30 frames per sec

for custom digital circuit

it takes 1ms/frame

total number of frames face recognized in 1 sec = 1/1m=1000frames/sec.>30 frames per second

therefore, a custom digital circuit is necessary

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