Guided Depth Upsampling via a Cosparse Analysis Model

This paper proposes a new approach to upsample depth maps when aligned high-resolution color images are given. Such a task is referred to as guided depth upsampling in our work. We formulate this problem based on the recently developed sparse representation analysis models. More specifically, we exp...

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Bibliographic Details
Main Authors: Gong, Xiaojin, Ren, Jianqiang, Lai, Baisheng, Yan, Chaohua, Qian, Hui
Format: Conference Proceeding
Language:English
Subjects:
Algorithm design and analysis
Algorithms
Analytical models
Color
cosparse analysis model
Guided depth upsampling
Image color analysis
Image edge detection
Image reconstruction
Image resolution
Mathematical analysis
multi-modal data fusion
Operators
Tasks
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Summary:This paper proposes a new approach to upsample depth maps when aligned high-resolution color images are given. Such a task is referred to as guided depth upsampling in our work. We formulate this problem based on the recently developed sparse representation analysis models. More specifically, we exploit the cosparsity of analytic analysis operators performed on a depth map, together with data fidelity and color guided smoothness constraints for upsampling. The formulated problem is solved by the greedy analysis pursuit algorithm. Since our approach relies on the analytic operators such as the Wavelet transforms and the finite difference operators, it does not require any training data but a single depth-color image pair. A variety of experiments have been conducted on both synthetic and real data. Experimental results demonstrate that our approach outperforms the specialized state-of-the-art algorithms.
ISSN:2160-7508
2160-7516
DOI:10.1109/CVPRW.2014.114