信号检测理论（signal detection theory）是研究噪声干扰下弱信号最优检测和信号参量估计的科学。又称噪声中的信号检测。信息论的分支学科。研究对象是在噪声理论和信号理论的基础上构造最优处理系统以最有效地获取有关信息。
本文根据信号检测理论，采用颜色相近的两光谱信号作分辨实验。
Based on the signal detection theory, an experiment on the recognition of colors was done by presenting two spectral signals of approximate colors.
同时引入空间距离的概念，根据调制映射关系，建立起多对一的最优信号检测理论。
At the same time, it introduces the definition of spatial distance, and establishes a multi-point to one point optimal signal detection theory according to the relationship of modulation mapping.
传统信号检测理论和方法主要采用似然比检测，已得到广泛的应用，但是存在明显的缺点。
The traditional signal detection theory and method using likelihood ratio test has been used widely, but it has obvious drawbacks.
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