DEVICE AND METHOD FOR ESTIMATIMING DEPTH MAP, AND METHOD FOR GENERATING INTERMEDIATE IMAGE AND METHOD FOR ENCODING MULTI-VIEW VIDEO USING THE SAME
First Claim
1. A device for estimating a depth map using multi-view images, comprising:
- a multi-view image storing unit that stores the multi-view images input through a multi-view video camera;
a segment setting unit that sets a segment for pixels having a difference in the intensity between adjacent pixels is equal to or less than a threshold value in a target image where the depth map is to be estimated among the multi-view images stored in the multi-view image storing unit;
a three-dimensional warping unit that acquires a warped image by performing three-dimensional warping for the segment set through the segment setting unit in a view of a reference image adjacent to the target image; and
an initial depth value searching unit that estimate only one depth value for each segment at the time of estimating the depth value of the warped target image on the basis of the reference image.
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Abstract
The present invention relates to a device and a method for estimating a depth map, and a method for making an intermediate image and a method for encoding multi-view video using the same. More particularly, the present invention relates to a device and a method for estimating a depth map that are capable of acquiring a depth map that reduces errors and complexity, and is resistant to external influence by dividing an area into segments on the basis of similarity, acquiring a segment-unit initial depth map by using a three-dimensional warping method and a self adaptation function to which an extended gradient map is reflected, and refining the initial depth map by performing a belief propagation method by the segment unit, and achieving smoother view conversion and improved encoding efficiency by generating an intermediate image with the depth map and utilizing the intermediate image for encoding a multi-view video, and a method for generating the intermediate image and a method for encoding the multi-view video using the same.
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Citations
14 Claims
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1. A device for estimating a depth map using multi-view images, comprising:
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a multi-view image storing unit that stores the multi-view images input through a multi-view video camera; a segment setting unit that sets a segment for pixels having a difference in the intensity between adjacent pixels is equal to or less than a threshold value in a target image where the depth map is to be estimated among the multi-view images stored in the multi-view image storing unit; a three-dimensional warping unit that acquires a warped image by performing three-dimensional warping for the segment set through the segment setting unit in a view of a reference image adjacent to the target image; and an initial depth value searching unit that estimate only one depth value for each segment at the time of estimating the depth value of the warped target image on the basis of the reference image. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for estimating a depth map using multi-view images, comprising:
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(a) storing the multi-view images input through a multi-view video camera; (b) setting a segment for pixels having a difference in the intensity between adjacent pixels is equal to or less than a threshold value in a target image where the depth map is to be estimated among the multi-view images stored through the step (a); (c) acquiring a warped image by performing three-dimensional warping for the segment set at step (b) on the basis of a reference image adjacent to the target image; and (d) estimating only one depth value for each segment at the time of estimating the depth value of the warped target image on the basis of the reference image. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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Specification