Development of the algorithm of video image adaptation to spectral power distribution of illuminants

Pyliavskyi, Volodymyr

doi:10.15587/1729-4061.2019.156491

Cited by 6 publications

(2 citation statements)

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“…Since the color coordinates can be varied, and for undistorted transmission it is necessary to consider them as shown in papers [5,6], it is desirable to obtain an algorithm that describes the region shown in Fig. 1 as analytical formulas that can be implemented in existing and future color transmission systems and information about them.…”

Section: Methodsmentioning

confidence: 99%

“…If the color temperature (K) is determined, the coordinates x can be applied in the formula (6) to determine if coordinates y can be applied in the formula (7). In case when the search coordinate values belonging to isothermal lines determine coordinates x, y, the lower boundary line and the top, two points of the segment obtained isothermal line will meet the predetermined color temperature.…”

Section: Forward Model Determination Of Chromaticity Coordinates In mentioning

confidence: 99%

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Color temperature line: forward and inverse transformation

Qasim¹,

Pyliavskyi²

2020

Semicond. phys. quantum electron. and optoelectron.

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In the calculations, colorimetric calculations using different types of light sources used are the black body line and the family of isothermal lines but the coordinates of the light source are determined by a schedule or set of color coordinates. When using modern models of color type CAM02, CAM16 it is necessary to promptly receive the light source coordinate data knowing its color temperature. The paper proposes an analytical expression that binds the color temperature dependence and its location in the system Yxy. The presented results cover the Kelvin temperature range from 1080 up to 10,000 K. The algorithm has a certain conversion error, which is shown in the figures, but when evaluating its magnitude it was determined that these errors are beyond the threshold of human visibility. The paper presents results that can be used in the construction of modern adaptive to the source of illumination of photo and video transmission systems. The data describing the color body lines under different vision adaptation conditions are presented, which will allow considering these features in new systems, to make the perception of visual information maximum under different viewing conditions from ordinary to the extreme ones. The use of isothermal lines extends the functionality of the listed areas of application and simplifies working with them.

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Section: Methodsmentioning

confidence: 99%

Section: Forward Model Determination Of Chromaticity Coordinates In mentioning

confidence: 99%