Research On Depth Information Estimation Of Array Images And Its Application

In the field of computer vision technology,research on the depth information of the image is very important,and it is an important basis for 3D reconstruction,image replacement,image measurement technology.The accuracy of the calculation result of depth information influences the accuracy of other calculations.The traditional algorithm to obtain the depth information of the image is the binocular stereo vision algorithm,which can calculate the depth information of the scene according to binocular disparity.Compared with the binocular stereo vision system composed of two cameras,the multi-view stereo vision system can obtain more information of the scene,and can more accurately calculate the depth information of the scene.In this paper,based on the 3×3 array lens,the depth information of the scene is obtained by the array image,and the depth map is used in the image replacement.The main research contents and innovations are as follows:(1)Calibration of the array lens.According to the principle of Zhang Zhengyou's classical calibration algorithm,the camera is calibrated by every two arrays,and each small lens is calibrated with the middle lens respectively to obtain the Internal and external parameters of the lens.(2)Stereo matching of the array image.Using the global matching algorithm for array image matching.The main steps include the construction of the global energy function,establishing the grid map.Using graph cut method to solve the minimum value of energy function.Then assigns a label value for each pixel,and is the depth information,and the depth map image is obtained.(3)Image replacement based on depth map.Based on the depth image through stereo matching,carry on the image replacement for the objects in the image,clicking the object in the original image to obtain depth information at the location,and then insert the target image into the corresponding layer depth to cover the original object and then finish the image replacement.The experimental results show that the lens array image depth information acquisition method can be effectively used for image replacement,and it can overcome some occlusion problems in the image to get good results of the replacement.