| 基于半像素的Hessian矩阵的空域误码掩盖 |
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| 引用本文： | 朱琳琳,赵岩,陈贺新.基于半像素的Hessian矩阵的空域误码掩盖[J].吉林大学学报(信息科学版),2009,27(6):557-562. |
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| 作者姓名： | 朱琳琳 赵岩 陈贺新 |
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| 作者单位： | (吉林大学 通信工程学院, ,长春 130012) |
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| 基金项目： | 国家自然科学基金资助项目，国家自然科学基金重点资助项目，吉林省科技发展计划基金资助项目 |
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| 摘 要： | 针对线条边缘采用传统的Sobel算子进行边缘检测和方向判别方法无法准确地检测其方向的问题，提出了基于半像素的Hessian矩阵对线条边缘进行检测的算法。该算法将图像中丢失的数据块的像素进行分类，再根据不同类别的边缘采用相应的边缘检测算子进行边缘检测，并根据检测的边缘方向对受损图像进行方向外推掩盖。实验证明，半像素精度的Hessian矩阵对线条边缘方向的检测更加精确，该算法较一般误码掩盖算法使受损图像的恢复质量PSNR(Peak Signul Noise Rate)值提高了0.2~0.4 dB。
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| 关 键 词： | 半像素 Hessian矩阵 边缘检测 方向外推 空域误码掩盖 |
Spatial Error Concealment Based on Hessian Matrix with Half Pixel Precision |
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| ZHU Lin-lin,ZHAO Yan,CHEN He-xin.Spatial Error Concealment Based on Hessian Matrix with Half Pixel Precision[J].Journal of Jilin University:Information Sci Ed,2009,27(6):557-562. |
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| Authors: | ZHU Lin-lin ZHAO Yan CHEN He-xin |
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| Institution: | College of Communication Engineering, Jilin University, Changchun 130012, China |
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| Abstract: | For the linear edges,the method using the traditional Sobel operator for edge detection and direction discrimination can not accurately detect the direction.An algorithm for linear edge detection using Hessian matrix with half pixel precision is proposed.The pixels in the lost block of the image are classified,for different edges,we use different edge detection operator to detect the directions of the edges.The corrupted image is concealed by directional extrapolation according to the detected edge directio... |
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| Keywords: | half pixel Hessian matrix edge detection directional extrapolation spatial error concealment |
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