The major problem to be overcome in mapping of coral reef ecosystem using remote sensing imagery is the confusion arises between optically similar spectral characteristics of different end-members which are to be used as input for various classification techniques. This work attempts to study in detail the possibilities of identifying the specific wavelength regions for separating optically similar signals of coral reef benthic compositions based on two different hypotheses using derivative analysis. First hypothesis is 1st order derivative analysis can be used to separate optical signatures of different families of corals; and second hypothesis is 2nd order derivative analysis can be used to separate optical signatures of coral species among Acropora family. Results imply that, i) at 515 nm Acropora Muricata, at 585 nm Favia Speciosa & Porites Solida and at 635 nm dead staghorn coral exhibit a negative first order derivative may be the evident that these spectral windows can be helpful in discrimination of corals based on family-wise; ii) at 558 nm Acropora Digitfera, at 565 nm , at 582 nm Acropora Secale, at 595 nm Acropora Varibalis, and at 598 nm Acropora Muricata exhibit a positive second order derivative can be helpful in separating different species among the Acropora family.

使用遥感影像绘制珊瑚礁生态系统地图时要克服的主要问题是，不同末端成员的光学相似光谱特性之间会出现混淆，这些末端成员将用作各种分类技术的输入。这项工作试图详细研究识别特定波长区域的可能性，以使用导数分析基于两种不同的假设来分离珊瑚礁底栖成分的光学相似信号。第一个假设是一阶导数分析可用于分离不同珊瑚科的光学特征；和第二假设是二阶导数分析可以用于分离中珊瑚物种的光学特征鹿角家族。结果表明，i) 在 515 nmAcropora Muricata，在 585 nm Favia Speciosa & Porites Solida和在 635 nm 死鹿角珊瑚表现出负的一阶导数可能是这些光谱窗口可以帮助基于家庭来区分珊瑚的证据；ⅱ）在558纳米鹿角Digitfera，在565纳米，在582纳米的鹿角黑麦，在595nm处鹿角Varibalis，和在598纳米的鹿角柃表现出正的第二阶导数可以在中分离不同物种有用的鹿角家族。