Abstract
Abstract3-D image acquisition is required to obtain 3-D information of the objective world or higher-dimensional comprehensive information for 3-D computer vision. This includes not only collecting 3-D images directly, but also collecting (implicitly) images containing 3-D information and extracting the 3-D information in subsequent processing. There are a variety of methods to obtain (or restore) depth information. This chapter will introduce the generalized high-dimensional image f(x, y, z, t, λ) with 5 variables, and gives several typical examples. This chapter will introduce the comparison of depth images and grayscale images, and further the comparison of more general intrinsic images and non-intrinsic images. In addition, various depth imaging methods are also listed. This chapter will introduce several typical direct methods for depth imaging, including time-of-flight method, structured light method, Moiré contour stripes method and laser radar (LADAR) that can simultaneously acquire depth and intensity images. This chapter will also introduce several typical modes of using binocular (dual cameras) to collect images for stereo imaging, including binocular lateral mode, binocular convergence mode, and binocular axial mode.
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