破碎轮廓图形的光学几何特征与感知阈值

The optical-geometrical characteristics and thresholds of perception of fragmented outline figures.

作者信息

Merkul'ev A V, Shelepin Yu E, Chikhman V N, Pronin S V, Foreman N

机构信息

Visual Physiology Laboratory and Faculty of Information Technology, I. P. Pavlov Institute of Physiology, Russian Academy of Sciences, 6 Makarov Bank, 199034 St. Petersburg, Russia.

出版信息

Neurosci Behav Physiol. 2005 Jan;35(1):83-7. doi: 10.1023/b:neab.0000049654.31828.4f.

DOI:10.1023/b:neab.0000049654.31828.4f

PMID:15739791

Abstract

Measurements were made of the threshold of recognition of cumulatively forming line figures. The threshold value of the outline, expressed in pixels, depended on the length of the outline of the whole unfragmented figure. Relative threshold values were constant, and for the measures of figure fragments used in the present study, averaged 12.5%. A spatial frequency analysis of the test images was performed. Variation of the amplitude-frequency parameters of the spectra of the images of various figures with threshold fragmentation was minimal as compared with the variation of these parameters in figures with subthreshold or suprathreshold levels of fragmentation.

摘要

对累积形成的线条图形的识别阈值进行了测量。以像素表示的轮廓阈值取决于整个未分割图形的轮廓长度。相对阈值是恒定的，在本研究中使用的图形片段测量中，平均为12.5%。对测试图像进行了空间频率分析。与具有亚阈值或超阈值碎片化水平的图形相比，各种图形图像光谱的幅度-频率参数随阈值碎片化的变化最小。