Mcalibrator: MATLAB言語を用いたディスプレイ較正のための統合型GUIソフトウェアの開発 : ディスプレイ特性に依存しない新しい色較正手法の提案とその有効性の検証

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  • Mcalibrator: MATLAB integrated GUI software for display calibration : A proposal of a new color calibration procedure applicable to a wide range of display devices and evaluation of its efficiency
  • Mcalibrator: MATLAB言語を用いたディスプレイ較正のための統合型GUIソフトウエアの開発--ディスプレイ特性に依存しない新しい色較正手法の提案とその有効性の検証
  • Mcalibrator MATLAB ゲンゴ オ モチイタ ディスプレイ コウセイ ノ タメ ノ トウゴウガタ GUI ソフトウエア ノ カイハツ ディスプレイ トクセイ ニ イゾン シナイ アタラシイ イロ コウセイ シュホウ ノ テイアン ト ソノ ユウコウセイ ノ ケンショウ

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The calibration of color monitors is an essential step for psychological experiments on color perception. For CRT displays, a procedure was established and standardized as the two-stage method of gamma correction, followed by linear color transformation. However, the standard method may not be appropriate for non-CRT displays. The present study has demonstrated that indeed the standard method was not applicable to some LCD (Liquid Crystal Display) and DLP (Digital Light Processing) display devices, which are now increasingly used in psychological or brain-imaging experiments. We therefore propose a new display calibration procedure which is based on least-square estimations. This method has a much broader range of applicability because it assumes only a piecewise linearity of the system and does not require any presumed model of the display properties. The proposed procedure, together with customizable gamma corrections, was integrated into a GUI-based calibration software which was written with MATLAB and called 'Mcalibrator'. The applicability and efficiency of our software to a wide range of displays, including LCD and DLP devices, was confirmed by comparing the calibration accuracy of our procedure with that of the standard two-stage method.

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