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The RGB color model is an additive system in which each color is defined by the amount of red, green, and blue light emitted. In the RGB scheme, color... 阅读全文
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5.3 Tuples and SequencesWe saw that lists and strings have many common properties, e.g., indexing and slicing operations. They are two examples ofsequ... 阅读全文
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推荐博文,博客。写得很好,给个赞。Reference Link :http://blog.csdn.net/xiaowei_cqu/article/details/7829481一阶导数法:梯度算子对于左图,左侧的边是正的(由暗到亮),右侧的边是负的(由亮到暗)。对于右图,结论相反。常数部分为零。用... 阅读全文