Abstract: This paper is the third part of the three dimensional digital photogrammetry intelligent conformation under the machine vision parameter:the direct 3D imaging mechanism of the light field and the 3D intelligent conformation benchmark of digital photogrammetry.In this paper,the moving object’s capture takes 3-3-2 information processing as the starting point,the basic principle of using biological compound eye three-dimensional imaging,however,because the traditional bionic vision by the hardware constraints,this paper obtained the theory based on bionic compound eye 3-3-2 information,the use of a new generation of micro lens array light field camera technology,put forward a method of extracting depth information of the scene to single light field images,and its application to absolute depth measurement.The light field image an important characteristic is that the intensity and direction of different light information recording into the camera,this paper proposes the use of light information for multi depth focusing,the focusing points in different levels of cost calculation,determine the object image plane,finally construct the depth map object point based on the location of the imaging plane.Compared with the traditional light depth estimation,the depth map obtained by this method can greatly improve the resolution,and does not depend on the number of micro lens in the light field.In order to verify the effectiveness of the proposed method,this paper will compare the depth calculation using the algorithm proposed in this paper and the existing depth information algorithm.

Key words: bionic compound eye, light field, 3D-3D transform, 3D computation