objective c - iOS face detection CIDetectorAccuracyHigh vs CIDetectorAccuracyLow -

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i'm concerned time takes detect faces using cidetector.

using cidetector large image such [rep fullscreenimage] cidetectoraccuracyhigh should produce best results , longest execution time. execution time consists of decoding image , running detection on bitmap image. more noticeable on older devices.

to save execution time, should use:

  1. [rep aspectratiothumbnail] & cidetectoraccuracyhigh
  2. [rep fullscreenimage] & cidetectoraccuracylow
  3. other ideas?


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