摘要
提出了一种数码相机拍摄的文本图像的二值化方法,该方法是全局阈值、局部阈值与灰度梯度方法的结合。全局阈值与局部阈值的结合能较好地保留字符的笔画细节,灰度梯度方法能增强字符的笔画轮廓,实验结果表明该方法是有效的。
A binarization method for digital camera-based document image was proposed. The method is a combination of the global thresholding, local thresholding and the gray gradient method. The global thresh- olding and local thresholding are combined to reserve character strokes finely. Outlines of the character strokes are enhanced by the gray gradient method. The efficiency is shown by experimental results.
出处
《上海工程技术大学学报》
CAS
2006年第3期214-218,共5页
Journal of Shanghai University of Engineering Science
关键词
二值化
文本图像
阈值
灰度梯度
binarization
document image
thresholding
gray gradient
