摘要
点扩展函数的设置是图像复原中的关键问题,对于匀速直线运动模糊图像,运动方向和模糊长度决定了点扩展函数。根据运动模糊图像和原始图像在频谱上存在的对应关系,即运动模糊图像频谱存在着对应于传递函数零点的暗条纹,提出对运动模糊图像,通过二维傅里叶变换、二值化以及Radon变换检测运动模糊图像频谱图上暗条纹的方向和位置,来实现运动方向测量的方法。用该方法对模糊图像进行检测,模糊方向的识别精度小于1°。实验证明该方法可以实现平面内任意方向运动的测量。
Setting the point spread function of motion blurred image is zhe key problem in the image restoration. For uniform linear motion blurred images, the blur direction and length determine the point spread function. The identification of blur direction in motion blurred images is one of the most important steps of image restoration. There are sets of negative ripples corresponding to zero values of the transfer function, which can be found on spectrums of motion blurred images. Based on this spectrum relationship between motion blurred image and original image, a method to identify the motion blur direction from the motion blurred image is presented by detecting the negative ripples direction and location on the 2D-Fourier transform spectrum with binary image and Radon transform. The method is used to detect motion blurred images and vague direction. The identification accuracy is less than 1°. The experimental results prove that this method is able to measure motion blur in discretionary direction.
出处
《光学与光电技术》
2008年第4期68-70,共3页
Optics & Optoelectronic Technology
关键词
运动模糊
传递函数
频谱
RADON变换
motion blur
transfer function
frequency spectrum
Radon transform
