Depth map is the key technology of "2D video + depth map" for 3D display. On the basis of the research into quaternion and Gabor filter, the depth map acquisition technique based on Quaternion-Gabor wavelet motion estimation was proposed. Through calculating the global motion vector of image from ordinary video, the background motion model was estimated and the motion field was gotten. In the end, the foreground and the background of the image were isolated, and the depth map of the image was obtained. Through expanding ordinary Gabor filter to Quaternion-Gabor filter, it can not only get extra information through transforming the picture to frequency domain, but also can get independent filter to each pixel's RGB. The experimental results show that the changes of depth map obtained by Quaternion-Gabor wavelet motion estimation will be very smooth and edges will be more outstanding.%深度图是“二维视频+深度图”格式3D显示器的关键技术所在.在对四元数及Gabor滤波器进行研究的基础上提出了基于Quatemion-Gabor小波运动估计的深度图获取技术.通过计算普通视频运动图像的全局运动向量,估计出图像背景运动模型,获得图像运动场,最后分离出图像的前景与背景,从而得到图像的深度图.将普通的Gabor滤波器扩展到Quaternion-Gabor滤波器,不仅把图像变换到频率域获得额外的信息,而且可以对每个像素的RGB分别独立滤波.实验结果表明,使用Quaternion-Gabor小波运动估计方法得到的深度图变化很平滑,边缘更突出.
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