Use the image edge contrast method to select four color spaces, and propose three segmentation methods 3PCA, 2PCA, 1PCA based on the principal component analysis.
用图像边缘对比度方法选择了四个彩色空间,在主成分分析的基础上提出了三种分割方法3PCA、2PCA、1PCA。
参考来源 - 基于SOM神经网络的牛乳体细胞图像处理技术·2,447,543篇论文数据，部分数据来源于NoteExpress
The influence of the phase step of the broadband terahertz pulses on the edge contrast is discussed.
讨论了太赫兹脉冲在样品边缘处经历的相位阶跃与边缘对比度的关系。
This thesis proposes an algorithmic adaptive image enhancement method based on pixel classification, but this method only can change edge slope and can not change edge contrast.
本文在图像自适应增强方面，提出了基于像素分类的算法自适应图像增强方法。但是这种方法只能改变边缘的斜率而不能改变边缘两侧的对比度。
While shapes are mostly defined by a contrast between elements, they're also defined by their contour, or edge.
虽然形状主要是通过元素间的对比来定义，但它们也可以借助轮廓线或边来定义。
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