基于Android手机的铅笔画生成方法研究

ON GENERATION METHOD OF PENCIL SKETCHING BASED ON ANDROID CELLPHONE

根据Android系统手机的特性以及真实铅笔画纹理的特点,提出一种基于快速线积分卷积(FLIC)的铅笔画自动生成方法。首先将用户输入的彩色图像进行灰度化处理,并利用Sobel算法进行轮廓提取,产生铅笔画中的轮廓效果;然后对图像进行分层处理,提出了适用于图层的白噪声生成方法;最后采用快速积分卷积(FLIC)替代传统线积分卷积(LIC)进行模拟纹理,并将各层结果以及图像轮廓进行叠加生成最终铅笔画。试验结果表明:该方法在Android系统的手机中生成速度快,并且结果接近于手绘铅笔画。

According to the property of Android system mobile phone and the characteristics of real pencil drawing texture, we propose an approach for automatic pencil drawing generation technique based On fast line integral convolution （FLIC）. First, we conduct gray-scale processing on colour image the user inputted, and use Sobel algorithm to extract the contour line to generate contour effects in pencil sketching. Secondly, we conduct hierarchical processirig on source image, and suggest a way to generate white noises fitting each layer. At last, we use FLIC instead of traditional line integral convolution （LIC） to simulate the pencil texture image, and superpose the results on each layer as well as image contours to obtain final pencil drawing. Experimental results show that our method has fast generation speed on mobile phones with Android system, and the images it generates approach the real pencil drawings.