However, far too often color enters the equation as an afterthought, or worse, not all all.

然而，颜色往往只是通盘决定之后的马后炮，有时候甚至被不管不顾。

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In this paper, current colorization algorithms are summarized and the principle of color propagation is analyzed. Then a colorization algorithm based on Laplace equation is proposed.

在总结现有图像彩色化方法的基础上，分析了彩色化由局部向全局扩展的本质，进而提出了一种通过求解拉普拉斯方程实现颜色扩展的彩色化方法。

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A method of H-D two-line analysis is given and isochromate equation of pseudo-color code of optical image is obtained.

本文提出了H-D双线的分析方法，得到了光学图象假彩色编码中的等色线方程。

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