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首页> 外文期刊>IEEE transactions on visualization and computer graphics >Light field morphing using 2D features
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Light field morphing using 2D features

机译：使用2D要素进行光场变形

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摘要

We present a 2D feature-based technique for morphing 3D objects represented by light fields. Existing light field morphing methods require the user to specify corresponding 3D feature elements to guide morph computation. Since slight errors in 3D specification can lead to significant morphing artifacts, we propose a scheme based on 2D feature elements that is less sensitive to imprecise marking of features. First, 2D features are specified by the user in a number of key views in the source and target light fields. Then the two light fields are warped view by view as guided by the corresponding 2D features. Finally, the two warped light fields are blended together to yield the desired light field morph. Two key issues in light field morphing are feature specification and warping of light field rays. For feature specification, we introduce a user interface for delineating 2D features in key views of a light field, which are automatically interpolated to other views. For ray warping, we describe a 2D technique that accounts for visibility changes and present a comparison to the ideal morphing of light fields. Light field morphing based on 2D features makes it simple to incorporate previous image morphing techniques such as nonuniform blending, as well as to morph between an image and a light field.
机译：我们提出了一种基于2D特征的技术来变形由光场表示的3D对象。现有的光场变形方法要求用户指定相应的3D特征元素以指导变形计算。由于3D规范中的细微错误会导致明显的变形伪影，因此我们提出了一种基于2D特征元素的方案，该方案对特征的不精确标记不太敏感。首先，用户在源和目标光场中的许多关键视图中指定2D特征。然后，两个光场在相应的2D要素的引导下逐个弯曲。最后，将两个弯曲的光场混合在一起以产生所需的光场变形。光场变形中的两个关键问题是特征指定和光场射线弯曲。对于要素规范，我们引入了一个用户界面，用于在光场的关键视图中描绘2D要素，并自动将其插入到其他视图中。对于射线扭曲，我们描述了一种2D技术，该技术考虑了可见性的变化，并提出了与理想光场变形的比较。基于2D特征的光场变形使合并先前的图像变形技术（例如非均匀混合）以及在图像和光场之间变形变得容易。

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