Fourier power spectrum characteristics of face photographs: attractiveness perception depends on low-level image properties.
Fourier power spectrum characteristics of face photographs: attractiveness perception depends on low-level image properties.
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DOI：
10.1371/journal.pone.0122801
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发表时间：
2015
期刊：
影响因子：
3.7
通讯作者：
Redies C
中科院分区：
文献类型：
--
作者：
Menzel C;Hayn-Leichsenring GU;Langner O;Wiese H;Redies C
我们调查了自然场景和艺术品共享的低水平加工图像属性--但不是真实的面部照片--是否会影响对面部吸引力和年龄的感知。具体地说，我们考虑了对数-对数曲线中径向平均傅里叶功率谱的斜率。该斜率是对特定频率功率在图像中的分布的测量。与面部图像相比，自然场景和艺术品的图像具有相对较浅的斜率(即增加的高空间频率功率)。由于审美感知可能基于对具有自然场景统计的图像的有效处理，因此我们假设面部吸引力的感知也可能受到这些属性的影响。我们计算了面部图像中的傅立叶斜率和其他与美貌相关的测量，并将它们与所描绘的人的吸引力和年龄的评级相关联(研究1)。我们发现，当我们控制年龄时，傅立叶斜率--与其他测试的图像特性相反--并不能预测吸引力评级。在研究2A中，我们用具有不同统计量的随机相位图案来覆盖人脸图像。与自然场景和艺术品中的斜度相似的图案导致吸引力较低，年龄评级较高。在研究2B和2C中，我们直接操纵脸部图像的傅立叶斜率，发现斜率较浅的图像被评为更具吸引力。此外，未改变的面孔的吸引力受到随机相位背景的傅立叶斜率的影响(研究3)。统计数据与自然场景相似的背景前面的面孔和面孔被评为更具吸引力。我们得出的结论是，面部吸引力评级受到特定图像属性的影响。一个解释可能是有效编码假说。
We investigated whether low-level processed image properties that are shared by natural scenes and artworks – but not veridical face photographs – affect the perception of facial attractiveness and age. Specifically, we considered the slope of the radially averaged Fourier power spectrum in a log-log plot. This slope is a measure of the distribution of special frequency power in an image. Images of natural scenes and artworks possess – compared to face images – a relatively shallow slope (i.e., increased high spatial frequency power). Since aesthetic perception might be based on the efficient processing of images with natural scene statistics, we assumed that the perception of facial attractiveness might also be affected by these properties. We calculated Fourier slope and other beauty-associated measurements in face images and correlated them with ratings of attractiveness and age of the depicted persons (Study 1). We found that Fourier slope – in contrast to the other tested image properties – did not predict attractiveness ratings when we controlled for age. In Study 2A, we overlaid face images with random-phase patterns with different statistics. Patterns with a slope similar to those in natural scenes and artworks resulted in lower attractiveness and higher age ratings. In Studies 2B and 2C, we directly manipulated the Fourier slope of face images and found that images with shallower slopes were rated as more attractive. Additionally, attractiveness of unaltered faces was affected by the Fourier slope of a random-phase background (Study 3). Faces in front of backgrounds with statistics similar to natural scenes and faces were rated as more attractive. We conclude that facial attractiveness ratings are affected by specific image properties. An explanation might be the efficient coding hypothesis.
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