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We present a scene depth map generation method based on light field cameras. From the plenoptic function, the angular information about each image point under different sizes of aperture is extracted, which could be used for confocal stereo. Considering confocal constancy and gradient constancy, we take into account two constraints: (1) When a pixel is in focus, its relative intensities across aperture...
Plenoptic cameras which can capture both spatial and angular light information by one shot have attracted great interests. Compared with traditional cameras, a plenoptic image has large resolution and enormous amounts of microlens images. Due to huge volume of data, an efficient plenoptic image compression method for transmission and storage is required. In this paper, a novel plenoptic image compression...
Due to the trade-off between spatial and angular resolution, the effective spatial resolution of a light field image is usually less than one percent of the number of pixels on the photo sensor. In this paper, we propose a prototype algorithm to upsample a light field image. Because the boundary edges of 3D objects would result in lines on epipolar plane images (EPIs), the main idea of our method...
Pinhole-array-based hand-held light field cameras can be used to capture 4-dimensional light field data for different applications such as digital refocusing and depth estimation. Our previous experiences suggest the design of the pinhole array mask is very critical to the performance of the camera, and the selection of mask parameters could be very different between applications. In this paper, we...
Video stabilization is of fundamental importance to provide high-quality video for non-stationary camera. However, conventional video stabilization methods did not consider lens distortion because the inter-frame translation is mostly estimated under the assumption of pure geometrical transform. This paper proposes a video stabilization algorithm which models the image distortion with a division model...
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