Depth estimation method using depth-of-field imaging of retroreflector

The existing depth estimation methods commonly use an active light source to detect the depth of an object. However, in the outdoor situation, the sunlight interrupts their depth measurements and the accuracy of them.

The proposed method does not need any active light source because it measures the depth information not on the object domain but the object domain. Depth of field imaging by retroreflector indicates the depth position of object image, immediately. We believe that the proposed method is applied for the depth measurement systems such as LIDAR and time of flight camera.