The invention discloses a high-precision mirror image type voltage-stabilizing oscillation face recognition system with adjustable filter frequencies. The high-precision mirror image type voltage-stabilizing oscillation face recognition system is mainly composed of a facial image acquisition device and a microprocessor MCU connected with the facial image acquisition device, and is characterized in that the microprocessor MCU is connected with a face recognition circuit, the face recognition circuit is composed of a mirror image type voltage-stabilizing oscillation circuit, a signal processing circuit, a constant-current source circuit and a graph recognition circuit, the signal processing circuit is connected with the mirror image type voltage-stabilizing oscillation circuit, the graph recognition circuit is connected with the constant-current source circuit, and a filter-frequency adjustable circuit is arranged between the signal processing circuit and the constant-current source circuit. The high-precision mirror image type voltage-stabilizing oscillation face recognition system can make the voltage more stable, reduces voltage fluctuation, prolongs service life of circuits, can filter out undesired wave frequencies, avoids interference of the undesired wave frequencies in the recognition process, increases accuracy of the face recognition system, adjusts a potentiometer R3 and a potentiometer R6, and can adjust the recognition frequency of the face recognition system, thereby avoiding misrecognition phenomenon caused by different recognition distances.
High-precision mirror image type voltage-stabilizing oscillation face recognition system with adjustable filter frequency