The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Para que os dicromatas recebam as informações representadas nas imagens coloridas, é importante estudar métodos de melhoria de contraste e índices de avaliação quantitativa dos resultados de conversão de cores. Existe um índice para avaliar o grau de melhoria do contraste e neste índice é dada importância ao contraste para dicromacia causado pelo componente de luminosidade. Além disso, a amostragem aleatória foi introduzida no cálculo deste índice. Embora a validade do índice tenha sido demonstrada através da comparação com uma avaliação subjetiva, considera-se que os dois pontos seguintes devem ser examinados. Primeiro, o contraste para tricromacia normal causado pelo componente de luminosidade também deve receber importância. Em segundo lugar, a influência da amostragem aleatória deve ser examinada detalhadamente. Neste artigo, um novo índice é proposto e os pontos acima mencionados são examinados. Para o primeiro ponto, o seguinte é revelado através da experiência. A consideração do contraste da tricromacia normal causado por um componente de luminosidade igual ao da dicromacia pode ou não resultar em um bom resultado. O desempenho de avaliação do índice proposto é equivalente ao do índice anterior em geral. Pode-se dizer que o índice proposto é superior ao anterior em termos de unidade de avaliação do contraste. Para o segundo ponto são mostrados o tempo de cálculo e a avaliação dos dígitos significativos. Neste artigo, é utilizado um número de amostragem tal que o número de dígitos significativos possa ser considerado como três. Neste caso, a variação causada pela amostragem aleatória é insignificante em comparação com o intervalo do índice proposto, enquanto o tempo de cálculo é cerca de um sétimo daquele quando a amostragem não é adotada.
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Xi CHENG, Go TANAKA, "Examination of Quantitative Evaluation Index of Contrast Improvement for Dichromats" in IEICE TRANSACTIONS on Fundamentals,
vol. E106-A, no. 6, pp. 916-923, June 2023, doi: 10.1587/transfun.2022EAP1048.
Abstract: For dichromats to receive the information represented in color images, it is important to study contrast improvement methods and quantitative evaluation indices of color conversion results. There is an index to evaluate the degree of contrast improvement and in this index, the contrast for dichromacy caused by the lightness component is given importance. In addition, random sampling was introduced in the computation of this index. Although the validity of the index has been shown through comparison with a subjective evaluation, it is considered that the following two points should be examined. First, should contrast for normal trichromacy caused by the lightness component also be attached importance. Second, the influence of random sampling should be examined in detail. In this paper, a new index is proposed and the above-mentioned points are examined. For the first point, the following is revealed through experiment. Consideration of the contrast for normal trichromacy caused by a lightness component that is the same as that for dichromacy may or may not result in a good outcome. The evaluation performance of the proposed index is equivalent to that of the previous index overall. It can be said that the proposed index is superior to the previous one in terms of the unity of evaluating contrast. For the second point, the computation time and the evaluation of significant digits are shown. In this paper, a sampling number such that the number of significant digits can be considered as three is used. In this case, the variation caused by random sampling is negligible compared with the range of the proposed index, whereas the computation time is about one-seventh that when the sampling is not adopted.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.2022EAP1048/_p
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@ARTICLE{e106-a_6_916,
author={Xi CHENG, Go TANAKA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Examination of Quantitative Evaluation Index of Contrast Improvement for Dichromats},
year={2023},
volume={E106-A},
number={6},
pages={916-923},
abstract={For dichromats to receive the information represented in color images, it is important to study contrast improvement methods and quantitative evaluation indices of color conversion results. There is an index to evaluate the degree of contrast improvement and in this index, the contrast for dichromacy caused by the lightness component is given importance. In addition, random sampling was introduced in the computation of this index. Although the validity of the index has been shown through comparison with a subjective evaluation, it is considered that the following two points should be examined. First, should contrast for normal trichromacy caused by the lightness component also be attached importance. Second, the influence of random sampling should be examined in detail. In this paper, a new index is proposed and the above-mentioned points are examined. For the first point, the following is revealed through experiment. Consideration of the contrast for normal trichromacy caused by a lightness component that is the same as that for dichromacy may or may not result in a good outcome. The evaluation performance of the proposed index is equivalent to that of the previous index overall. It can be said that the proposed index is superior to the previous one in terms of the unity of evaluating contrast. For the second point, the computation time and the evaluation of significant digits are shown. In this paper, a sampling number such that the number of significant digits can be considered as three is used. In this case, the variation caused by random sampling is negligible compared with the range of the proposed index, whereas the computation time is about one-seventh that when the sampling is not adopted.},
keywords={},
doi={10.1587/transfun.2022EAP1048},
ISSN={1745-1337},
month={June},}
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TY - JOUR
TI - Examination of Quantitative Evaluation Index of Contrast Improvement for Dichromats
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 916
EP - 923
AU - Xi CHENG
AU - Go TANAKA
PY - 2023
DO - 10.1587/transfun.2022EAP1048
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E106-A
IS - 6
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - June 2023
AB - For dichromats to receive the information represented in color images, it is important to study contrast improvement methods and quantitative evaluation indices of color conversion results. There is an index to evaluate the degree of contrast improvement and in this index, the contrast for dichromacy caused by the lightness component is given importance. In addition, random sampling was introduced in the computation of this index. Although the validity of the index has been shown through comparison with a subjective evaluation, it is considered that the following two points should be examined. First, should contrast for normal trichromacy caused by the lightness component also be attached importance. Second, the influence of random sampling should be examined in detail. In this paper, a new index is proposed and the above-mentioned points are examined. For the first point, the following is revealed through experiment. Consideration of the contrast for normal trichromacy caused by a lightness component that is the same as that for dichromacy may or may not result in a good outcome. The evaluation performance of the proposed index is equivalent to that of the previous index overall. It can be said that the proposed index is superior to the previous one in terms of the unity of evaluating contrast. For the second point, the computation time and the evaluation of significant digits are shown. In this paper, a sampling number such that the number of significant digits can be considered as three is used. In this case, the variation caused by random sampling is negligible compared with the range of the proposed index, whereas the computation time is about one-seventh that when the sampling is not adopted.
ER -