A mechanical-noise suppressor based on a priori noise information for digital still cameras and camcorders

摘要

This paper proposes a mechanical-noise suppressor based on a priori noise information for digital still cameras and camcorders. With given timing information about noise periods, mechanical noise generated by motors and lens-actuators is suppressed based on reference noise data prepared in advance. The noise replica is generated from the reference noise and subtracted from the input signal for suppression. Individual and aging differences in the reference noise are automatically adjusted by scaling the reference such that the residual noise is minimized. Simulation results demonstrate that the mechanical noise generated by zooming and auto-focusing are successfully suppressed.