TRANSITION TYPE COLOR CALIBRATION CHART
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...
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Main Authors | , , , , , |
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Format | Patent |
Language | English Japanese |
Published |
28.03.2019
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Subjects | |
Online Access | Get full text |
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Summary: | 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 |
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Bibliography: | Application Number: JP20180155446 |