Color inconsistency between views is an important problem to be solved in multi-view video applications, such as free viewpoint television and other three-dimensional video systems. In this paper, by combining with multi-view video coding, a coding-oriented multi-view video color correction method is proposed. We first separate foreground and background in first Ggroup Oof Ppictures (GOP) by using SKIP coding mode. Then by transferring means and standard deviations in backgrounds, color correction is performed for each frame in GOP, and multi-view video coding is performed and used to renew the backgrounds. Experimental results show the proposed method can obtain better perform-ances in color correction and multi-view video coding.
Color inconsistency is an urgent problem to be solved in free viewpoint television.In this letter,a new color correction method is proposed by using disparity vector information.At first,we separate foreground and background from the scene with a method of mean-removed disparity estimation.Then the correction parameters are estimated by adopting linear fitting for foreground and background regions,respectively. Next,with expectation-maximization algorithm,we integrate correction parameters of foreground and background to get the final corrected image.Finally,video tracking technique is performed to correct multi-view video.Experimental results show that the proposed method is quite effective.
Color inconsistency between views is an important problem to be solved in multi-view video systems. A multi-view video color correction method using dynamic programming is proposed.Three-dimensional histograms are constructed with sequential conditional probability in HSI color space.Then,dynamic programming is used to seek the best color mapping relation with the minimum cost path between target image histogram and source image histogram.Finally,video tracking technique is performed to correct multi-view video.Experimental results show that the proposed method can obtain better subjective and objective performance in color correction.
Color and geometry inconsistency between different views is an urgent problem in multi-view imaging applications.In this paper,we present a color correction and geometric calibration method for multi-view images on the basis of feature correspondences between views.First,keypoints in views are detected by using scale invariant feature transform,and accurately matched by bi-directional feature matching between difference views.Then multiplicative and additive errors between matching keypoints are calculated to achieve color correction.In addition,an affine transformation between minimum cost matching keypoints is established to achieve geometric calibration.The experimental results verify the effectiveness of the proposed method in color correction and geometric calibration,and a higher coding efficiency is obtained.
