Image statistics of American Sign Language: comparison with faces and natural scenes
Image statistics of American Sign Language: comparison with faces and natural scenes
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DOI：
10.1364/josaa.23.002085
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发表时间：
2006-09-01
影响因子：
1.9
通讯作者：
Dobkins, Karen R.
中科院分区：
文献类型：
--
作者：
Bosworth, Rain G.;Bartlett, Marian Stewart;Dobkins, Karen R.
几条证据表明，环境的图像统计塑造了视觉能力。到目前为止，自然场景和人脸的图像统计已经很好地利用傅立叶分析。我们采用傅立叶分析来描述美国手语（ASL）中的符号图像。这些图像与依赖手语进行交流的签名者高度相关，因此手语的图像统计可能会影响签名者的视觉能力。对105幅标志的静态图像进行了傅立叶分析，并将这些图像与100幅自然场景图像和100幅人脸图像的分析进行了比较。我们从傅立叶分析中获得了两个度量：图像集上的平均幅度和幅度熵（这是信息论的一种度量），作为空间频率和方向的函数。我们的分析结果显示，在三个不同的图像集的图像统计有趣的差异，设置的可能性，美国手语的经验可能会改变视觉感知的可预测的方式。此外，对于所有图像集，平均幅度结果与熵结果明显不同，这提出了一个有趣的问题，即图像集的哪个方面（平均幅度或幅度熵）能够更好地解释已知的视觉能力。(c)2006年美国光学学会。
Several lines of evidence suggest that the image statistics of the environment shape visual abilities. To date, the image statistics of natural scenes and faces have been well characterized using Fourier analysis. We employed Fourier analysis to characterize images of signs in American Sign Language (ASL). These images are highly relevant to signers who rely on ASL for communication and thus the image statistics of ASL might influence signers' visual abilities. Fourier analysis was conducted on 105 static images of signs, and these images were compared with analyses of 100 natural scene images and 100 face images. We obtained two metrics from our Fourier analysis: mean amplitude and entropy of the amplitude across the image set (which is a measure from information theory) as a function of spatial frequency and orientation. The results of our analyses revealed interesting differences in image statistics across the three different image sets, setting up the possibility that ASL experience may alter visual perception in predictable ways. In addition, for all image sets, the mean amplitude results were markedly different from the entropy results, which raises the interesting question of which aspect of an image set (mean amplitude or entropy of the amplitude) is better able to account for known visual abilities. (c) 2006 Optical Society of America.