Eun-Su Kim

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SUMMARY The RGB signals generated by different cameras are not equal for the same scene. Therefore, cameras are characterized based on a CIE standard colorimetric observer. One method of deriving a colorimetric characterization matrix between camera RGB output signals and CIE XYZ tristimulus values is least squares polynomial modeling. Yet, this involves(More)
SUMMARY The gamma correction for the CMOS image sensors are implemented by the method of piecewise linear approximation through a look-up table. In this paper, we propose a quantitative criterion to select the piece linear segment with the same output interval for the reduction of the error between the value of piece linear approximation and gamma(More)
We investigated the effect of viewing condition on human visual perceivingness of colorfulness and conducted mathematical model for colorfulness by fitting regression curves to LUTCHI data. This model provides the simple and effective predictor for the relative appearance attribute of colorfulness as a function of brightness and saturation, taking into(More)
Generally, white balance of a conventional camera is set by linear adjustment of RGB channel gains. However, spectral sensitivity of human visual tri-receptor, LMS cone, is nonlinearly changed according to surround chromaticity and luminance level. Therefore, the perceived colors of the image reproduced on a standard display using the output signals of a(More)
In this paper, we propose a new algorithm for generating a high quality test bit-stream to evaluate the static image quality of DTV receiver based on a target bit allocation in the process of rate control. In order to allocate the number of target bits, we consider the normalized complexities, which are updated or maintained according to GOP picture(More)
SUMMARY In this paper, a chromatic adaptation model (CAM) based on the dependence on LMS cone responses of the human visual system (HVS) is proposed for TV and PC monitors under a variety of viewing conditions. We derived the proposed CAM based on Breneman's corresponding color data. The results of the experiments were carried out to assess the proposed(More)