基于傅里叶变换的图像素描效果生成算法

The Image Sketch Effect Algorithm Based on Fourier Transform

首先将真彩色图像转换为灰度图像,通过傅里叶正变换后将所有像素点的幅值设定为一常数,进行傅里叶逆变换,得到像素点的新灰度值;然后将每点灰度值倒置求反,再对图像进行锐化和平滑等处理来实现图像的素描效果。实验结果证明:该算法快速有效,生成的素描图像既能进行图像识别,提高图像质量,又可以达到美术和艺术效果,具有较高的理论和应用价值。

In this paper,we introduce an algorithm to realize the image's sketch effectAt first let the color image change into gray image,then set the pixels point's gray value through Fourier's positive and negative transformReset every pixels point's gray value negative,lastly,reset the new gray value of the pixels point by image sharp and smooth process.Experiment result prove that this algorithm is fast and effective,the image is distinct and vivid.The image can be identified and the image quality can be improvedMeantime,it can realize the art effect and have some useful theory and application worth