A New Rule-Based Classification Method Using Shape-Based Properties of Spectral Curves

Figure 6

Reflectance spectra of available plastics. Each category of plastic material corresponds with a specific spectral shape; likewise the shapes of Continuum Removed Reflectance Spectra are different. This means the rule defined for a category is specific to this category and there is no possible confusion as the shapes are distinct enough. So, such rules can be used only if spectral curve shapes are all sufficiently distinct.