基于多种边缘检测的视频划痕检测技术

Vertical Line Scratches Detection on Aged Movie Film Based on Variety of Edge Detection Technologies

针对电影胶片中比较常见的垂直划痕及其特性,提出了一种新的基于多种边缘检测的检测算法。该算法首先运用Sobel算子中对垂直边缘响应最大算子对图像进行边缘检测,然后运用Canny算子进行边缘检测,再用概率Hough变换检测图像中垂直直线,最后结合形态学处理和宽度约束得到划痕位置。实验结果表明,该算法能有效地进行噪声干扰下的划痕检测。

A new method for vertical line scratches detection based on a variety of edge detection technologies is proposed for the vertical scratches in old film. The method uses Sobel operator in the largest response to detect the vertical edge and uses Canny operator to detect edges, and gains the vertical lines through probabilistic Hough transform. The true locations of the vertical lines scratches are gained through morphology and width constraints. The method proves capable of detecting vertical line scratches in heavily-degraded film sequences.