为了获得真3D的显示效果,我们采用多层屏显示具有深度信息的衰减图的方法来实现.整个显示系统包括多层液晶显示模块、多路显示驱动模块和高亮度背光模块.多层3D图像采集和处理过程包括:架设相机对模型进行多个角度的拍摄,对这些投影图进行几何光学处理得到包含所有光线路径的稀疏矩阵,再通过最小二乘法拟合实际光场得到相应的衰减图,最后通过软件将衰减图输送到三层液晶屏显示系统进行显示.实验表明:重构出来的图像均方差为71.5,信噪比接近30 dB,效果较好.最后实验结果证明我们的显示系统具有良好的3D效果.
In order to obtain the true 3D display,we use the multi-layer screens to display the attenuation image with depth information.The display system includes the multi-layer liquid crystal device module,multi-channel driver module and high brightness backlight.We capture the objects from different angle,calculate the sparse matrix about the light field according to the project direction,and obtain the attenuation image by the least square fitting.At last,the attenuation image is conveyed to the three-layer LCD screen of display system by software.The experimental results show that the reconstructed image's mean square error is 71.5 and the peak signal to noise ratio is close to 30 dB,the effect is better.Finally,we give the experimental results which have the good 3D effect.
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