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Reflectivity estimation for SAR image compression

机译:SAR图像压缩的反射率估计

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摘要

Synthetic aperture radar (SAR) images suffer from speckle noise that degrades image quality. Also, speckle removal is needed for lossy image compression as such noise increases image entropy. Nevertheless, most lossy compression schemes act as lowpass filters that might not suit multiplicative noise reduction. In order to build a compression scheme that takes into consideration statistics of SAR images, a well-known reflectivity estimator is integrated into an JPEG 2000-like image compression strategy, so that image compression artifacts may be viewed as an adaptive despeckle filter instead of a simple lowpass filter. It yields a compression algorithm that acts in a similar way to the Lee (or Kuan) filter.
机译:合成孔径雷达(SAR)图像会受到斑点噪声的影响,从而降低了图像质量。另外,由于有损图像压缩,因此需要去除斑点以进行有损图像压缩。但是,大多数有损压缩方案都充当低通滤波器,可能不适合乘法噪声降低。为了建立一种考虑SAR图像统计信息的压缩方案,将众所周知的反射率估算器集成到类似JPEG 2000的图像压缩策略中,以便可以将图像压缩伪像视为自适应去斑滤波器,而不是将其视为简单的低通滤波器。它产生一种压缩算法,其作用类似于Lee(或Kuan)滤波器。

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