TEST AND FIELD SPECTRAL SENSITIVITIES OF COLOR MECHANISMS OBTAINED ON SMALL WHITE BACKGROUNDS - ACTION OF UNITARY OPPONENT COLOR PROCESSES
TEST AND FIELD SPECTRAL SENSITIVITIES OF COLOR MECHANISMS OBTAINED ON SMALL WHITE BACKGROUNDS - ACTION OF UNITARY OPPONENT COLOR PROCESSES
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DOI：
10.1016/0042-6989(83)90201-8
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发表时间：
1983-01-01
期刊：
影响因子：
1.8
通讯作者：
SNELGAR, RS
中科院分区：
文献类型：
--
作者：
FOSTER, DH;SNELGAR, RS
对于人类中央凹视觉，在大白色背景下获得的测试光谱灵敏度曲线在。apprx处显示峰值。440, 530和610纳米和一个小的倾斜或缺口在。580海里。在与测试场空间重合的小单色背景（辅助场）存在下推导出的中长波敏感显色机制的场光谱灵敏度曲线比相应的Stile' s II机制更清晰，峰值在.apprx处。530和605纳米。短波敏感的显色机制没有这种影响，峰值保持在。apprx。440海里。在大白色背景下得到的测试光谱灵敏度曲线和在空间重合的单色辅助场上得到的锐化场光谱灵敏度曲线都用色觉的对手过程理论来解释：非对手亮度系统的响应可以通过选择性消色差适应（在大白色背景下）或选择性轮廓掩蔽（在空间重合的辅助场下）来降低。将消色差和空间适应两种技术相结合：在空间上与测试场一致的小白色辅助场用于测试和现场光谱灵敏度的测量。测试光谱灵敏度曲线在.apprx处峰更清晰，缺口更深。实验结果表明，在大白色背景下获得的光谱灵敏度比在580 nm时高，且测试曲线与短波长和中长波场光谱灵敏度曲线的上包络线拟合良好，表明测试和场光谱灵敏度可能存在3种单一的对立色机制。对这一假设提出了一个关于辅助场色度对缺口位置的影响的检验。在580nm处测试光谱灵敏度曲线。
For human foveal vision the test spectral sensitivity curve obtained in the presence of a large white background exhibits peaks at .apprx. 440, 530 and 610 nm and a small dip or notch at .apprx. 580 nm. Field spectral sensitivity curves for the medium- and long-wavelength sensitive color mechanisms when derived in the presence of a small monochromatic background (auxiliary field) spatially coincident with the test field are sharper than the corresponding Stile''s II mechanisms and peak at .apprx. 530 and 605 nm. The short-wavelength sensitive color mechanism shows no such effect, the peak remaining at .apprx. 440 nm. The test spectral sensitivity curve obtained on a large white background and the sharpened field spectral sensitivity curves obtained on a spatially coincident, monochromatic auxiliary field were each interpreted in terms of an opponent-process theory of color vision: the response of the non-opponent luminance system may be reduced by selective achromatic adaptation (with the large white background) or by selective contour masking (with the spatially coincident auxiliary field). The 2 techniques of achromatic and spatial adaptations were combined: a small white auxiliary field spatially coincident with the test field was used in measurements of both test and field spectral sensitivities. The test spectral sensitivity curve showed more clearly defined peaks and a deeper notch at .apprx. 580 nm than when obtained on the large white background and the test curve was well fitted by the upper envelope of the short-wavelength and sharpened medium- and long-wavelength field spectral sensitivity curves, suggesting the possibility that 3 unitary opponent-color mechanisms may underlie test and field spectral sensitivities. A test of this hypothesis is proposed concerning the effect of auxiliary-field chromaticity on the position of the notch at .apprx. 580 nm in the test spectral sensitivity curve.