TRANSITION TYPE COLOR CALIBRATION CHART

• Main Authors: OGINO YOSHIHIKO, SAWARA TAKAHIRO, TAGUCHI KUNIO, KAJIMURA YOICHI, SASAGAWA YASUSHI, MIZUNO HITOSHI
• Format: Patent
• Language: English; Japanese
• Published: 28.03.2019
• Subjects: COLORIMETRY; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT; MEASURING; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; RADIATION PYROMETRY; TESTING

To provide a transition type color calibration chart performing accurate color calibration of imaging equipment by uniformizing brightness of a color bar group and suppressing influence of an IR cut filter.SOLUTION: The transmission type color calibration chart includes a transparent substrate and a color bar group formed on the transparent substrate. The color bar group is constituted in such a manner that color bars of a plurality of colors including at least a first color and a second color are arranged in a pattern shape in a random order. A coordinate point of the first color exists in a region surrounded by four points of (0.351, 0.649), (0.547, 0.453), (0.380, 0.506) and (0.433, 0.464) on an xy chromaticity diagram, and a coordinate point of the second color exists in a region surrounded by four points of (0.125, 0.489), (0.112, 0.229), (0.270, 0.407) and (0.224, 0.242) on the xy chromaticity diagram. A transmission spectrum of a color bar of the first color and a transmission spectrum of a color bar of the second color individually have peak tops separated from each other.SELECTED DRAWING: Figure 3 【課題】カラーバー群の明るさを均一にし、かつ、ＩＲカットフィルターの影響を抑制し、撮像機器の正確な色較正を行う透過型色較正用チャートを提供する。【解決手段】透明基板と、透明基板上に形成されたカラーバー群と、を有し、カラーバー群は、少なくとも第１色および第２色を含む複数色のカラーバーが、順不同でパターン状に配列されて構成され、上記第１色の座標点は、ｘｙ色度図上で（０．３５１、０．６４９）、（０．５４７、０．４５３）、（０．３８０、０．５０６）、（０．４３３、０．４６４）の４点に囲まれた領域内にあり、上記第２色の座標点は、ｘｙ色度図上で、（０．１２５、０．４８９）、（０．１１２、０．２２９）、（０．２７０、０．４０７）、（０．２２４、０.２４２）の４点に囲まれる領域内にあり、第１色カラーバーの透過スペクトルおよび第２色カラーバーの透過スペクトルが、それぞれ分離したピークトップを有する。【選択図】図３