| Item type |
紀要論文 / Departmental Bulletin Paper(1) |
| 公開日 |
2023-03-30 |
| タイトル |
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タイトル |
Analysis of Required Quantization Precision for CIE XYZ Signals in Discrete Region |
| 言語 |
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言語 |
eng |
| キーワード |
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主題Scheme |
Other |
|
主題 |
digital cinema, digital TV, required number of bits, color difference, XYZ signal, CIE 1976 L*a*b* |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
departmental bulletin paper |
| 著者 |
古川, 功
鈴木, 純司
Isao, FURUKAWA
Junji, SUZUKI
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
The Digital Cinema Initiative (DCI) in the U.S. has standardized a system for digital cinema in 2005, which digitally processes movies from production to distribution/screening. In the DCI standard, the required number of quantization bits is determined by applying the Barten’s model as a visual model for luminance signals only. However, since most of the actual movies are in color, it lacks sufficient theoretical basis. In this study, we formulate the problem of applying various transformations corresponding to luminance, density, and gamma-corrected values in the discretized domain to the CIE XYZ color space. By using the asymptotic expansion method in the continuous-valued domain to these respective values, we compare the required quantization accuracy with that obtained by the corresponding analysis in discretized domain. The results show that the required number of quantization bits obtained by the analysis in the discretized domain is consistent with the results of computer simulations and the approximations obtained in the continuous-valued domain for the cases of luminance (14 bits), density (12 bits), and gamma-corrected value quantization (11 bits), respectively. The required accuracy of conventional TV signals, which have a smaller signal range than that of digital cinema, is also investigated, and its validity is confirmed by the simulation. The proposed analysis method makes it possible to obtain the required number of quantization bits without time-consuming computer simulations. |
| 書誌情報 |
広島工業大学紀要. 研究編
巻 56,
p. 49-62,
発行日 2022-03
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| 出版者 |
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出版者 |
広島工業大学 |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
13469975 |
| 書誌レコードID |
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収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA11599110 |
| 権利 |
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権利情報 |
publisher |
| フォーマット |
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内容記述タイプ |
Other |
|
内容記述 |
application/pdf |
research56_049-062.pdf (9.2 MB)
