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arXiv 1306.1894cs.CV
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基于自适应层叠滤波器的相干斑抑制

Speckle Reduction with Adaptive Stack Filters

Universidad de Buenos Aires(布宜诺斯艾利斯大学);Universidade Federal de Alagoas(阿拉戈斯联邦大学)

María Elena Buemi, Alejandro C. Frery, Heitor S. Ramos

摘要:

堆栈滤波器是非线性滤波器的一种特殊情况。它们对于过滤具有不同类型噪声的图像具有良好的性能,同时保留边缘和细节。堆栈过滤器根据一组阈值将输入图像分解为二值图像堆栈。每个二值图像然后由布尔函数过滤,该布尔函数表征过滤器。自适应堆栈滤波器可以通过使用原型(理想)图像及其损坏版本进行训练来计算,从而导致关于损失函数的优化滤波器。在这项工作中,我们提出了使用选定的样本的最佳布尔函数的估计训练。我们研究了自适应堆栈滤波器的性能,当它们被应用到斑点图像,特别是合成孔径雷达(SAR)图像。这是通过使用合适的图像质量指标评估滤波图像的质量并通过测量所得图像的分类准确度来完成的。我们使用SAR图像作为输入,因为它们受到斑点噪声的影响,使得分类成为一项困难的任务。

英文摘要:

Stack filters are a special case of non-linear filters. They have a good performance for filtering images with different types of noise while preserving edges and details. A stack filter decomposes an input image into stacks of binary images according to a set of thresholds. Each binary image is then filtered by a Boolean function, which characterizes the filter. Adaptive stack filters can be computed by training using a prototype (ideal) image and its corrupted version, leading to optimized filters with respect to a loss function. In this work we propose the use of training with selected samples for the estimation of the optimal Boolean function. We study the performance of adaptive stack filters when they are applied to speckled imagery, in particular to Synthetic Aperture Radar (SAR) images. This is done by evaluating the quality of the filtered images through the use of suitable image quality indexes and by measuring the classification accuracy of the resulting images. We used SAR images as input, since they are affected by speckle noise that makes classification a difficult task.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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