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COLORMETRIC CHARACTERIZATION OF DECOMPOSED MEDIA WITH A MULTISPEKTRAL SCANNER AND A SPECTRAL BASIC MODEL
COLORMETRIC CHARACTERIZATION OF DECOMPOSED MEDIA WITH A MULTISPEKTRAL SCANNER AND A SPECTRAL BASIC MODEL
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机译:用多光谱扫描仪和光谱基本模型对分解后的介质进行比色表征
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摘要
Modeling spectral characteristics of an image acquisition device. In one implementation, a computer system predicts the spectral reflectance or transmittance of a sample scanned by an image acquisition device, such as a graphic art scanner, by modeling the device. The sample is scanned by a scanner. The computer system searches for media coordinates in a colorant space corresponding to the sample. The media coordinates correspond to an estimated spectrum in a basis spectra model. The basis spectra model is derived by analyzing training color patches of the sample distributed throughout the gamut of the colorant set on the sample media. The estimated spectrum generates estimated digital values through a forward model of the scanner. The estimated digital values are compared to target digital values generated by the scanner to calculate an error value. The computer system repeats this process until a desired stopping criterion or criteria are met. The estimated spectrum corresponding to the final estimated digital values represents the reflectance spectrum of the sample as scanned by the scanner.
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