binaryzation

To meet the real-time request, the license plate is first located and segmented from the grey level image after preprocessing and then binaryzation of the license plate area only is implemented, sparing the long time spent on binaryzation of the whole image.

为了满足实时性要求，避免对整幅图像进行二值化耗时较长且阈值选取困难的缺点，直接在预处理后的灰度图像中定位车牌，然后对粗定位出的车牌二值化。

In this system, several functions are implemented, such as image importing, image smoothing, gray image binaryzation, the separation of mesh mark and gear teeth surface based on morphological filter, and the calculation of characteristic parameters of gearing mesh mark.

该系统具有图像导入、图像平滑、灰度图像二值化、基于形态学滤波的齿面接触印痕和齿面背景分离以及齿轮接触印痕特征参数计算等功能。

For solving this issue, the paper combines the techniques of grad image binaryzation, contour tracing and edge thinning on the basis of Gauss-Laplace edge operator, and obtaines one-pixel-wide edge image with high location precision.

为解决这类问题，在高斯拉普拉斯边缘检测算子的基础上，结合了梯度图像二值化，边界跟踪和细化技术，从而得到了具有较高定位精度的单像素宽的边缘图像。