边缘检测

In addition, morphology analysis method of the dual value image is also discussed and the practical and improved operations of the four morphological image processing such as electric filter design, marginal pattern testing, skeleton withdrawal and image reconstruction are introduced.

在文章中，我们还讨论了二值图象的形态分析算法，接着引入了形态滤波器设计、边缘形态检测、骨架抽取、图象重建四种形态学图像处理的实用算法及其改进算法。

In addition, morphology analysis method of the dual value image is also discussed and the practical and improved operations of the four morphological image processing such as electric filter design marginal pattern testing, skeleton withdrawal and image reconstruction areint roduced.

在文章中，我们还讨论了二值图象的形态分析算法，接着引入了形态滤波器设计、边缘形态检测、骨架抽取、图象重建四种形态学图像处理的实用算法及其改进算法。

Due to different properties of the signal and noise in wave-let coefficient modulus under different scale of wavelet transformation, we can extract the edge characteristic through detecting the local maximum of the wavelet transformation coefficient modulus.

基于信号与噪声在不同尺度下小波系数模的变化特征，可以通过检测小波变换系数模局部极大值来提取图像的边缘特征。

The experimental results show that this detection method can effectively filter the noise, remain the fundamental information of original particle images, and the edge image has smooth edge, continual skeleton and less breakpoint.

实验结果表明：这种检测方法能有效地滤除噪声，很好地保留原有图像的基本信息，提取的边缘较光滑，图像骨架也比较连续，断点少。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。