Research On Holographic Stereogram Synthesis Technology Based On Integrated Imaging Data Source And Double Exposure Method

Holographic display technology has the characteristic of real reproduction of wave-front information and can format three-dimensional images in space.Holographic stereogram is based on the principle of traditional optical holography,through the point by point interference recording method,the three-dimensional information of the scene is recorded on the holographic dry plate in the form of interference fringes.Due to binocular visual effects,stereoscopic scene information can be seen in a large field angle range during optical reproduction.This paper is mainly focus on the acquisition of parallax image data and improving the efficiency of synthesizing holographic stereogram.Firstly,the principle of optical holography and binocular stereoscopic vision effect are expounded and the geometric correspondence between holographic synthesis and parallax image acquisition is clarified.The acquisition methods of disparity images of three-dimensional scene for synthesizing holographic stereogram are analyzed.The traditional methods are complicated,cumbersome and prone to errors.Therefore,the method of obtaining parallax image data based on integrated imaging acquisition system is studied,which is convenient,fast and accurate to obtain the parallax image array of three-dimensional scene for the synthesis of holographic stereogram.Secondly,based on the principle of synthesis holographic stereogram,the methods of improving image resolution and field of view of holographic stereogram are analyzed.The relationship between the parameters of integrated imaging acquisition system and the resolution of holographic stereogram is analyzed.To obtain high resolution images requires a dense and large number of parallax image arrays,which also leads to a significant increase in the synthesis time.Then,aiming at the problem of low synthesis efficiency of traditional synthetic device,a double exposure method is proposed to improve the efficiency of synthesis.According to the principle of double exposure method,a rectangular double lens is designed and fabricated,and the two-dimensional image array is pretreated.The factors influencing the results of holographic experiments are studied,including the stability of the devices,the angle of the incident light,the intensity ratio and the diffraction effect of the spatial light modulator.Finally,based on the integrated imaging data,a dot matrix full-parallax holographic stereogram is synthesized by double exposure synthesis device and the optical reproduction is performed.The optical reproduction results are better,and significant parallax information can be observed in both horizontal and vertical directions.The comparison with the traditional single exposure method shows that the double exposure method can improve the synthesis efficiency of holographic stereogram under the premise of ensuring the quality of the synthesis.