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| Colorimetric characterization of imaging device by total color difference minimization |
| MOU Tong-sheng, SHEN Hui-liang |
| State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China; Department of Information and Electronic Engineering, Zhejiang University, Hangzhou 310027, China |
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Abstract Colorimetric characterization is to transform the device-dependent responses to device-independent colorimetric values, and is usually conducted in CIEXYZ space. However, the optimal solution in CIEXYZ space does not mean the minimization of perceptual error. A novel method for colorimetric characterization of imaging device based on the minimization of total color difference is proposed. The method builds the transform between RGB space and CIELAB space directly using the downhill simplex algorithm. Experimental results showed that the proposed method performs better than traditional least-square (LS) and total-least-square (TLS) methods, especially for colors with low luminance values.
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Received: 31 October 2005
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