Depth Measurement Technology With Monocular And Binocular Composite System

Deep information recovery is an important research content in the field of computer vision.When using conventional optical imaging systems to image objects at different distances,mechanical movements are required to cause image magnification changes,resulting in errors in depth measurements.In recent years,electronically controlled liquid crystal lens optical imaging systems have achieved functions such as focusing,zooming,and depth measurement.The binocular stereoscopic depth measurement can be expanded by the liquid crystal lens optical imaging system to expand the binocular depth measurement range.The depth measurement accuracy of the binocular stereo vision system is related to the object distance.The farther the object distance is,the lower the accuracy is.This topic makes a detailed experiment and research on binocular stereoscopic depth measurement of liquid crystal lens optical imaging system by using the zooming characteristics of liquid crystal lens without mechanical movement.First,In the liquid crystal lens vision imaging system in order to obtain high contrast images without a polarizer an optimization algorithm for polarizer free imaging of liquid crystal lens is proposed(PFI).The edge of the image is extracted,and the PFI is performed using the unfocused image and the focused image at the edge portion of the image.Experiments show that the optimized algorithm improves the contrast of the image edge,and the image obtained after optimization is reduced by about 50% compared to the image before optimization.Secondly,in the study of the optical characteristics such as the power and rms aberration of the liquid crystal lens,the transient characteristics of the liquid crystal lens were found.Experiments have shown that the liquid crystal lens maintains the lens state at any switching time of the positive and negative lens and the aberration is less than 0.1 wave.The transient characteristics of the liquid crystal lens enable fast focus on every object in the scene.Based on this,the subject realizes extended deep of field imaging of liquid crystal lens.Experiments have shown that the magnification of the image with different object distances is the same when the liquid crystal lens aperture is used as the system diaphragm.Combined with the wavelet fusion algorithm,a series of images from different focusing surfaces are processed to obtain a clear extended depth of field image.Finally,binocular stereo vision optical imaging system with the liquid crystal lens is built,in accordance with the five steps of binocular stereo vision depth measurement technology.The image is acquired by the displacement platform,the camera calibration of the liquid crystal lens optical imaging system,the parallel calibration of the image binocular,and the semi-global matching algorithm are used to realize the depth measurement of objects at different distances.Experiments have shown that binocular depth acquisition can be extended by binocular depth acquisition using a liquid crystal lens optical imaging system.