【摘要】 为了抑制散射对数字射线图像特征造成的模糊,提出了立足于空间域的不依赖于成像条件的抑制散射算法。该算法设置像素波动标准差σ为阈值,自适应搜索邻域相似特征区间,以确定卷积核尺寸M×N;在M×N内采用快速算法计算卷积核系数,并定义散射补偿系数γ,获得图像的散射信息;从原始图像中减去卷积计算的散射值,便可提高特征的清晰度。该算法采用了简单快速的自适应空间域滤波和代数运算,提高了图像质量。试验表明算法不仅具有很好的稳定性,而且具备很强的适用性。更多还原

【Abstract】 In order to inhibit the fuzzy image features of digital radiography image induced by scattered radiation, an algorithm for inhibiting scattering light is proposed on the basis of spatial domain independent of imaging conditions. By setting standard deviation σ as threshold, the algorithm adaptively searches for similar feature region of neighborhoods to determine convolution kernel size M×N and calculates the convolution kernel coefficient by a fast algorithm within M×N, defines the scattering compensation coefficients, thus obtaining the scattered radiation of the image. And then using a mathematical mode subtracts the scattered radiation from the original image. In this way the feature sharpness can be improved. Simple, fast and adaptive spatial filtering and arithmetic operation are adopted by the algorithm and image quality is improved. The test results show that the algorithm not only has good stability, but also has a strong applicability.更多还原