A Video Depth refinement with Circuit model constraint

彬彬

The raise of 3D image market is rapid. In previous work [Wang

2008], distortion and grid line bending constraints is adapted to

image resizing while important areas remain the same scale. In

another previous work [Lang 2010], disparity of input stereo

image is remapped, and warped stereo image pairs are

manipulated by similar constraints. In our system, we adapt image

constraints similar to Lang’s work, but for a depth refinement

purpose. Original random and sharp depth error causes

deformation and large defect of hole-filling. These errors are

refined, but with a consequence of blurred depth edge. So we

adapt another circuit model constraint to sharpen the depth edge

again, but maintain the smoothed results at the same time. This

technique is modified from previous work [Grady 2006], pixels

are electrical circuit nodes with resistance derived from RGB

difference. Generally, temporal smooth in video processing needs

information from several frames. But in our system, no multiple

frames involve but only current frame. In the same scene,

different frames share similar color and shape. Since depth map is

refined by 2D image, and temporal 2D images are similar, refined

depths tend to be smoothed and sharpened in similar way. Finally,

depth map of previous frame is used as an initial depth map of

current optimization. Experiment results in Figure 1 & 2 show

significant improvement.

奇

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tc

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晃晃

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C.R.CAN

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菜刀吻电线

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奇

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