Speckle reduction in optical coherence tomography images by use of a spatially adaptive wavelet filter
Speckle reduction in optical coherence tomography images by use of a spatially adaptive wavelet filter
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DOI：
10.1364/ol.29.002878
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发表时间：
2004-12-15
期刊：
影响因子：
3.6
通讯作者：
Fujimoto, JG
中科院分区：
文献类型：
--
作者：
Adler, DC;Ko, TH;Fujimoto, JG
采用一种空间自适应二维小波滤波器对时域和傅立叶域光学相干层析成像（OCT）图像中的散斑噪声进行抑制。边缘可以从由于噪声引起的不连续性中分离出来，并且可以在小波域中衰减噪声功率而不会显著损害图像清晰度。单个参数控制降噪程度。当将该滤波器应用于眼科OCT图像时，获得了>7 dB的信噪比改善，锐度降低了
A spatially adaptive two-dimensional wavelet filter is used to reduce speckle noise in time-domain and Fourier-domain optical coherence tomography (OCT) images. Edges can be separated from discontinuities that are due to noise, and noise power can be attenuated in the wavelet domain without significantly compromising image sharpness. A single parameter controls the degree of noise reduction. When this filter is applied to ophthalmic OCT images, signal-to-noise ratio improvements of >7 dB are attained, with a sharpness reduction of