x-射线前散射图像物体真实灰度级的图像处理

为了准确提取物体的有效特征值,得到目标物体的真实灰度级,以前散射图像为例,建立了目标物体、背景物体及重叠区域灰度级之间的数学模型来描述物体间的重叠关系,把多个物体重叠问题简化为两个物体重叠问题.根据x-射线与物质相互作用关系、x-射线源类型、探测器通道数等对重叠关系模型进行转换、简化、推导,得到目标物体真实灰度级模型.将测得的80组灰度级代入目标物体真实灰度级模型中进行求解,结果表明,模型误差在10%以内,该模型算法有效可行.

Image processing for true gray level of objects in x-ray forward scatter images

In order to extract the valid eigenvalue and obtain the true gray level of target objects, the mathematical model for the relationship between the target objects, background objects and overlapping regions was established to describe the overlapping relationship between the objects through taking the forward scatter images as examples, and a multi object overlapping problem was simplified into a two object overlapping problem. According to the interaction relationship between x ray and objects, the type of x ray source and the channel number of detector, the model for the overlapping relationship was converted, simplified and derived. In addition, the model for the true gray level of target objects was obtained. 80 groups of measured gray levels were substituted into the model for solving the true gray levels of target objects. The results show that the model error is within 10%, and the proposed model algorithm is effective and feasible.