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題名 | Parametric-Effect Evaluation Using Small Colour-Difference Pairs=小色差色樣對之參數效果評估 |
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作者 | 管倖生; | 書刊名 | 成功大學學報 |
卷期 | 32(科技.醫學篇) 民86.11 |
頁次 | 頁135-151 |
分類號 | 963 |
關鍵詞 | 參數效果; 色差; 色差公式; 灰階法; Parametric effect; Colour difference; Colour-difference formula; Grey scale method; |
語文 | 英文(English) |
中文摘要 | 很多觀測變數會影響到色樣對的知覺性色差。世界照明委員會(CIE)屬下之 1- 28技術委員會所提出影響色差評估之參數,即用以調查此一問題。本實之目的即探討色樣 對間之間隔大小與背景顏色等觀測參數對知覺性色差之影響。 本研究依據間隔(無間隙、3英吋間隙)與背景色(色、灰、黑)等參數之別分成四組 實驗。全部色樣均採用酸性染料染色之純羊毛平織布製成,色彩分別落於CIE建議之五個色 彩中心內。四組實驗均由同一組21位觀測者使用灰階法就 75個色樣對進行判色,各實驗 結果分別求算出色彩區別橢圓。本研究採用三種方法評估參數效果,實驗結果與參考狀態 (GGH)加以比較,最大參數效果17%)出現於白色背景狀況。 這些實驗結果最後用於測試CIELAB'CMC'BFD及CIE94等四個色差公式。結果顥示BFD 色差公式最佳,次為CMC、CIE94、而CIELAB最差。此外本研究發現小色差色樣與大色差色 樣在知覺判斷上有相當大差別。 |
英文摘要 | Several viewing parameters might affect perceived colour differences of sample pairs, and the CIE Technical Committee 1-28 on Parameters Affecting Colour-difference Evaluation was therefore formed to investigate this problem. A large-scale experiment was conducted to study the effects of separations and background and it was divided into four phases according to the different parameters studied, which were two separations (hairline and three-inch gap) and three backgrounds (white, mid-gray and black). Wool samples were dyed using acid dyes corresponding to five colour centers suggested by CIE and for all four phases, 75 pairs were assessed by the same panel of 21 observers using the grey scale method. The colour-discrimination ellipses were obtained from the experimental results for the different phases. In this present study, three methods were derived and suggested to evaluate the parametric effects. The largest parametric effect (17%) was found with the white background in comparison with the reference phase (GGH). These visual data were then used to test four colour-difference formulae: CIELAB, CMC, BFD, and CIE94. The results showed that the BFD colour-difference formula performs best, followed by CMC and CIE94, while CIELAB performs least well. In addition, a large difference occurs in the characteristics of small and large colour differences. |
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