Pixel unit and denoising method therefor, dynamic vision sensor and imaging apparatus

A dynamic vision sensor, comprising:

• a pixel array consisting of multiple pixel units, and the pixel unit, comprising:
• a pixel photosensitive circuit for detecting an optical signal, and generating and outputting an electrical signal when a change in the optical signal is detected;
• and
• a communication circuit connected to the pixel photosensitive circuit and outputting the electrical signal;
• characterized by further comprising:
• a neighborhood denoising circuit connected to the pixel photosensitive circuit, the communication circuit and other pixel units in four neighborhoods, for controlling, according to response states of adjacent pixel units, whether the communication circuit outputs the electrical signal;
• and outputting electrical signals generated after the pixel units in the array sense an optical signal,
• wherein an excitation signal output end of each of the pixel units is connected to neighborhood denoising circuits of other pixel units in neighborhoods of the pixel unit.

A denoising method of pixel units of a dynamic vision sensor, comprising steps of:

• when a central pixel unit detects a response trigger event, triggering and acquiring response states of other pixel units in four neighborhoods;
• judging whether at least three of the other pixel units in the four neighborhoods are in a non-response state;
• and
• if yes, the central pixel unit not responding to the response trigger event.

An imaging device, comprising:

• a dynamic vision sensor, comprising:
• a pixel array consisting of multiple pixel units, and outputting electrical signals generated after the pixel units in the array sense an optical signal, wherein an excitation signal output end of each of the pixel units is connected to neighborhood denoising circuits of other pixel units in neighborhoods of the pixel unit;
• an image processing unit processing an electrical signal input by the dynamic vision sensor, and generating and outputting picture data or dynamic image data;
• a storage unit storing the picture data or the dynamic image data generated by the image processing unit;
• and
• a transmitting unit enabling an external device to establish connection communication with the storage unit;
• and the pixel unit, comprising:
• a pixel photosensitive circuit for detecting an optical signal, and generating and outputting an electrical signal when a change in the optical signal is detected;
• and
• a communication circuit connected to the pixel photosensitive circuit and outputting the electrical signal;
• characterized by further comprising:
• a neighborhood denoising circuit connected to the pixel photosensitive circuit, the communication circuit and other pixel units in four neighborhoods, for controlling, according to response states of adjacent pixel units, whether the communication circuit outputs the electrical signal.