Method and system for calculating three-dimensional depth of field based on double imaging device

The invention relates to a method for calculating the three-dimensional depth of field based on double imaging device. The method comprises the steps of acquiring a first image and a second image, which are respectively collected by a first imaging device and a second imaging device, of a target object; determining a first pixel point in the first image, and acquiring a first row sequence value and a first column sequence value of the first pixel point; acquiring a second pixel point set in the second image; determining a pixel point with the highest similarity reference value in the second pixel point set to serve as a target pixel point; calculating the pixel position difference between the first pixel point and the target pixel point; and calculating a three-dimensional depth of field value of a point corresponding to the first pixel point and the target pixel point in the target object according to the pixel position difference. The beneficial effects lie in that the three-dimensional depth of field value of a certain point in the target object can be quickly determined according to the method for calculating the three-dimensional depth of field based on the double imaging device.