Multi-camera unit structure and device

A multi-camera unit device, comprising:

• a first camera unit;
• a second camera unit being distant from the first camera unit with a first distance in a first direction, wherein the first direction is defined by the first camera unit and the second camera unit, and the first camera unit and the second camera unit, with taking the first camera unit as an imaging reference, obtain a first DOF (depth of field) image of a target object;
• a third camera unit being distant from the first camera unit or the second camera unit with a second distance in a second direction, wherein the second direction is defined by the third camera unit and the first camera unit or by the third camera unit and the second camera, the first direction and the second direction define an included angle, and the third camera unit and the first camera unit, with taking the first camera unit as an imaging reference, obtain a second DOF image of the target object, or the third camera unit and the second camera unit, with taking the second camera unit as an imaging reference, obtain the second DOF image of the target object;
• a calibrated-image generation unit obtaining a calibrated DOF image according to the first DOF image and the second DOF image;
• and
• a casing, wherein the first camera unit, the second camera unit, the third camera unit and the calibrated-image generation unit are disposed in the casing.