首页>
外国专利>
Apparatus and method for robust non-local means filtering of tomographic images
Apparatus and method for robust non-local means filtering of tomographic images
展开▼
机译:用于对断层图像进行鲁棒的非局部均值滤波的设备和方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
An apparatus for performing a non-local means (NLM) filter is described. The pixel of the NLM-filtered image are weighted averages of pixels from a noisy image, where the weights are a measure of the similarity between patches of the noisy image. The similarity weights can be calculated using a Kullback-Leibler or a Euclidean distance measure. The similarity weights can be based on filtered patches of the noisy image. The similarity weights can be based on a similarity measure between patches of an anatomical image corresponding to the noisy image. The similarity weights can be calculated using a time series of noisy images to increase the statistical sample size of the patches. The similarity weights can be calculated using a weighted sum of channel similarity weights calculated between patches of noisy image that have been band-pass filtered. The NLM-filtered image can also be blended with a non-NLM-filtered image.
展开▼