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Design of Advanced Color - Temperature Control System for HDTV Applications
BongsoonKang,OhakMoon,ChangheeHong,HonamLee,BonghwanCho,YoungsunKim 한국물리학회 2002 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.41 No.6
This paper proposes an advanced color-temperature control system for HDTV applications. Compared with the X-chromaticity method [1], it improves the capability in color-temperature calculation by using an additional Y-chromaticity coordinate. It also extends the temperature range from 3000 K to 1667 K by using new coordinates that are obtained by using a linear regression method. The proposed system requires 32174 bits in ROM size, which is an 88 % reduction in hardware compared with the X-chromaticity method. The proposed system is experimentally demonstrated for color temperatures in the range from 1667 K to 25000 K by using the Xilinx FPGA Virtex XCV2000E-6BG560 device.
Performance Analysis of SCA Algorithm in Comparison with DSA Algorithm
Bongsoon Kang,Hoongee Yang,Seong-Gyoon Park 한국정보과학회 1999 Journal of Electrical Engineering and Information Vol.4 No.2
This paper provides analytical details of adapting spatial correlation algorithm (SCA) to coherent nature of microwave imaging, which was originally designed to work in an incoherent target scenario. This is accomplished via subarray processing that enables the conversion of coherent target scenario from near field to far field, such that it resembles incoherent target nature. The criteria for subarray size is presented and it is incorporated in implementing the SCA. In order to compare the performance of SCA with that of dominant scatterer algorithm (DSA), two cases of adaptive beamforming (ABF) sources are utilized. For each case, two algorithms are compared in terms of reconstructed image quality such as peak sidelobe level, rms phase error, maximum amplitude, and lower bound of image correlation coefficient.