A naked-eye 3D display method and device based on a multilayer transparent liquid crystal screen

Abstract

A naked-eye 3D display method and device based on a multi-layer transparent liquid crystal screen, the device includes a multi-layer transparent liquid crystal screen, and the method includes two parts: monocular image depth map estimation and depth-to-level conversion. The depth information of some video frames is calculated, and a video frame with depth information is obtained by correlation calculation. The depth-to-level conversion is based on the depth information. The distance between the multi-layer LCD screens and the light attenuation between the screens are considered, and the content of objects at different depths in the image corresponds to It is assigned to each LCD screen of the multi-layer transparent LCD screen for display to realize naked-eye 3D display. Based on the classical SFS algorithm principle, the invention optimizes its calculation process, improves its calculation speed, and cuts out the calculated depth information according to the characteristics of the liquid crystal multi-layer screen, so as to achieve the depth calculation that can basically calculate the image content in real time. , to meet the requirements of engineering applications.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal screens, relates to naked-eye 3D display, and relates to a naked-eye 3D display method and device based on a multilayer transparent liquid crystal screen. Background technique [0002] At present, the mainstream naked-eye 3D technologies include: slit liquid crystal grating, lenticular lens, pointing light source, and active backlight. [0003] [1] Slit type liquid crystal grating. The principle of this technology is that after adding a slit grating in front of the screen, when the image that should be seen by the left eye is displayed on the LCD screen, the opaque stripes will block the right eye; similarly, the image that should be seen by the right eye will be displayed When on an LCD screen, the opaque stripes shade the left eye, allowing viewers to see 3D images by separating the left and right eye views. [0004] [2] Lenticular lens, this technical principle is to project the pixels...

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Problems solved by technology

[0008] In the prior art, "3D Display System and Algorithm Design Based on Liquid Crystal Multilayer Screen" (Chen Xiaoxi, Li Guangyong, Wang Jimin, Jiang Shan, Huang Zhangying, Liu Chenxi. "Liquid Crystal and Display", 2017, 32(4): 302-307. ) proposed the concept of the liquid crystal multi-layer screen, but in the design of the display algorithm, only the attenuation of light after multi-layer transmission is studied and provided, how to display the distance and layering of the required content on the multi-layer LCD screen did not mention

The invention patent "A Virtual Reality Device and Corresponding Display Method" (CN201611264973.1) also proposed the concept of liquid crystal multi-layer screen, but in the algorithm design, it did not mention how to obtain the depth information of the image to be displayed, and mapped to each layer

In academia, although there are many research schemes for depth acquisition based on a single image, such as the SFS (Structure Restoration from Shadow) scheme proposed by Horn in 1970, this method uses the brightness and shadow of the image under different lighting conditions to extract Calculating the depth information of the surface of an object is one of the important means to obtain 3D data in computer vision. This type of algorithm is relatively mature and its content can already obtain more accurate depth information, but its calculation amount is relatively large, and it is difficult to match the normal LCD screen. The computing power of the band, and there is a certain amount of noise

With the development of machine learning technology, there have been new processing solutions recently, such as image depth acquisition based on deep learning, but the calculation amount of such solutions is unimaginable for the computing power of normal LCD screens.

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