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首页> 外文会议>Conference on Videometrics IX >Acquisition of three-dimensional coordinates of objects from Axi-Vision image data and application to stereoscopic display using Integral Photography system
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Acquisition of three-dimensional coordinates of objects from Axi-Vision image data and application to stereoscopic display using Integral Photography system

机译：从Axi-Vision图像数据获取对象的三维坐标，并使用集成摄影系统将其应用于立体显示

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摘要

Versatile three-dimensional (3D) image data as in the form of I(X, Y,Z) defined in the camera coordinate system are acquired from sets of color image and depth image, which are simultaneously captured at a video frame rate by a 3D camera named Axi-Vision camera. The X and Y coordinates are calculated from the image coordinates (x, y) on the image plane of CCD based on the perspective projection theory. The Z coordinate can be obtained for each pixel of the color image directly from the depth image without any complex processing. Thus, the 3D image data of objects, I(X,Y,Z), is obtained from the relation between the camera coordinate and the image coordinate systems. A stereoscopic video image display is demonstrated using the 3D image data using an integral photography (IP) system, which combines a 4-inch VGA liquid crystal color display panel and a pinhole array. Aliasing, an issue from mismatch of image qualities between the 3D image data and the IP system, is effectively suppressed by pre-processing the color Axi-Vision image data using a two-dimensional lowpass filter, which is designed based on analyses of the maximum spatial frequency of the 3D image transformed appropriate for the LCD size and the Nyquist spatial frequency of the IP system.
机译：从彩色图像和深度图像中获取在相机坐标系中定义的I（X，Y，Z）形式的多功能三维（3D）图像数据，并通过视频帧速率同时捕获这些图像。 3D相机称为Axi-Vision相机。 X和Y坐标是根据透视投影理论从CCD图像平面上的图像坐标（x，y）计算得出的。无需任何复杂处理，就可以直接从深度图像中为彩色图像的每个像素获取Z坐标。因此，从照相机坐标和图像坐标系之间的关系获得对象的3D图像数据I（X，Y，Z）。使用集成了4英寸VGA液晶彩色显示面板和针孔阵列的集成摄影（IP）系统，使用3D图像数据演示了立体视频图像显示。通过使用二维低通滤波器对彩色Axi-Vision图像数据进行预处理，可以有效抑制3D图像数据和IP系统之间图像质量不匹配引起的混叠问题，该滤波器是基于最大分辨率的分析而设计的转换为适合LCD尺寸和IP系统的奈奎斯特空间频率的3D图像空间频率。

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