【摘要】 当利用X射线数字成像技术对在流水线上运动的工件进行检测时,图像采集系统与工件在曝光时间内发生相对运动,造成了采集到的图像运动模糊降质。通过对运动降质产生机理的理论分析,建立了图像降质的离散退化模型。提出了利用运动模糊降质点扩展函数频域特性加上投影均值最大法来测量模糊运动方向的方法。旋转运动模糊图像的幅度谱图像,利用整列投影值最小法提取运动模糊降质点扩展函数长度。利用维纳滤波法对模糊降质图像进行了恢复,取得了较好的效果。更多还原

【Abstract】 In X-ray digital real-time imaging testing , the image is degraded by motion blur caused by the relative linear movement between object and image acquisition equipment .After the analysis of the theory on motion blur, discrete mathematical model of motion degeneration is established. The frequency characteristics of motion blur point spread function and the maximal average value of projection are used to determine motion direction. And rotating the Fourier transform image of motion blurred image ,the displacement of motion is determined by minimum of row projection method. Wiener filter is used to restore the motion blurred image, and a satisfactory result is gotten.更多还原