Detection of flickering edges: absence of a red-green edge detector.
Detection of flickering edges: absence of a red-green edge detector.
复制标题
闪烁边缘检测：缺少红绿边缘检测器。
DOI：
10.1016/s0042-6989(99)00126-1
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发表时间：
1999
期刊：
影响因子：
1.8
通讯作者：
Kronauer,RE
中科院分区：
文献类型：
--
作者：
Gowdy,PD;Stromeyer3rd,CF;Kronauer,RE
Kelly（（1975）Science，188，371-372）表明，中心固定的对比度反转边缘对亮度和红绿闪烁的检测具有非常不同的效果。红-绿闪烁的灵敏度是均匀场的2.3倍，比两侧异相闪烁的“分裂”场大。对于亮度闪烁观察到正好相反的效果-分裂场在2或4 Hz下产生比均匀场7倍的优势，在12 Hz下产生3倍的优势。与Kelly相反，我们发现分裂场在2 Hz时仅提供40%的亮度闪烁的非常小的优势，并且在4 Hz及以上时几乎没有优势。凯利的色度结果是令人惊讶的，因为人们可能会认为，在中央边缘的较大的色差（或步骤）将有助于颜色的歧视，而不是强烈抑制敏感性。我们发现，中央色边缘只有微弱的损害检测。进一步的结果表明，彩色分裂场的两侧基本上独立地检测红色或绿色“斑点”检测器，不利用跨边缘的色差。这有一个显着的含义：当测量波长歧视与双边领域的两个方面是缓慢调制在相反的方向，那么一边可能会被删除，几乎没有不利影响。
Kelly ((1975) Science, 188, 371–372) showed that a centrally-fixated, contrast-reversing edge has a very different effect on the detection of luminance and red–green flicker. Red–green flicker sensitivity was ∼3-fold greater for a uniform field than for a ‘split’ field with the two sides flickering out-of-phase. Just the opposite effects were observed for luminance flicker — the split field yielded a 7-fold advantage over the uniform field at 2 or 4 Hz and a 3-fold advantage at 12 Hz. Contrary to Kelly, we find that the split field offers only a very small advantage of 40% for luminance flicker at 2 Hz and virtually no advantage at 4 Hz and above. Kelly’s chromatic results are surprising since one might expect that the larger color difference (or step) across the central edge would aid chromatic discrimination rather than strongly suppressing sensitivity. We show that the central chromatic edge only weakly impairs detection. Further results show that the two sides of the chromatic split field are detected essentially independently by red or green ‘blob’ detectors, which do not take advantage of the color difference across the edge. This has a remarkable implication: when wavelength discrimination is measured with a bipartite field whose two side are slowly modulated in opposite directions, then one side may be deleted with little adverse effect.