Color Management for Future Video Systems

Symp Digest of Tech Papers

Lin

2013

Self Cite

Section: P-34 / S Wenmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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P.34: A Video Signal Coding Method Based on an Absolute Color Space for Saving Bit Depth

Symp Digest of Tech Papers

Lin

2013

Self Cite

“…The authors of [14] considered interpolation in the RGB signal space, where the camera was assumed to follow the sRGB standard so that RGB signal values and XYZ tristimulus values can be converted to each other via the well-known sRGB matrix. This hypothetical camera is called the sRGB camera, and its spectral sensitivities are presented in [22].…”

Section: Introductionmentioning

confidence: 99%

Auxiliary Reference Samples for Extrapolating Spectral Reflectance from Camera RGB Signals

Hsu

et al. 2022

Sensors

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Surface spectral reflectance is useful for color reproduction. In this study, the reconstruction of spectral reflectance using a conventional camera was investigated. The spectrum reconstruction error could be reduced by interpolating camera RGB signals, in contrast to methods based on basis spectra, such as principal component analysis (PCA). The disadvantage of the interpolation method is that it cannot interpolate samples outside the convex hull of reference samples in the RGB signal space. An interpolation method utilizing auxiliary reference samples (ARSs) to extrapolate the outside samples is proposed in this paper. The ARSs were created using reference samples and color filters. The convex hull of the reference samples and ARSs was expanded to enclose outside samples for extrapolation. A commercially available camera was taken as an example. The results show that with the proposed method, the extrapolation error was smaller than that of the computationally time-consuming weighted PCA method. A low cost and fast detection speed for spectral reflectance recovery can be achieved using a conventional camera.

“…The number density of palette colors is large at a high luminance level, while it is sparse at a low luminance level. The non-uniform color distribution results in the flaw color appearance such as color banding [1] and the fail of color gamut mapping (CGM) [3]. For an original picture with neighboring pixels of smoothly changing colors, a display may show the same color for these pixels due to the lack of corresponding palette colors.…”

Section: Introductionmentioning

confidence: 99%

13.4: An Electro‐Optical Transfer Function with Improved Uniformity of Palette Color Distribution in Absolute Color Space

Symp Digest of Tech Papers

2015

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