基于空间频率平均能量谱的整体视觉认知理论研究

发布时间：2018-03-17 06:30

本文选题：空间频率　切入点：视觉通道　出处：《天津大学》2012年硕士论文　论文类型：学位论文

【摘要】：早期视觉认知过程存在两大认知理论:即“初期整体知觉”理论和“初期特征分析”理论。其中“初期整体知觉”理论把视觉认知看作是一个“从大范围性质到局部性质”的认知过程,而“初期特征分析”理论则把视觉认知看作是一个“从局部性质到大范围性质”的认知过程。然而人类的视觉认知系统,不可能同时存在两条研究方向截然相反的认知路线。本文基于自然图像空间频率与平均能量谱的线性规律,在频率域研究视觉频率多通道理论,并建立图像的空间频率与平均能量谱的统计规律计算模型理论,利用图像的空间频率统计特性来重新解释“初期整体知觉”理论及其著名实验现象。文章的主要工作如下: 1.在以往视觉系统的生理特性及视觉信息多通道理论研究基础之上,深入研究了视觉在空间频率域的多通道理论,并从空间频域阐述了用视觉多通道理论解释拓扑知觉的可行性。 2.根据自然图像空间频率与平均能量谱的统计规律特性,设计人类视觉认知在空间频域的统计规律计算方法,建立相应的视觉空间频率统计模型。 3.用本文提出的视觉空间频率统计模型在频域将陈霖拓扑知觉理论中的著名实验现象以及视觉不变性等基础的视觉现象进行重新解释,从而在频域上补充完善了视觉的整体认知理论。视觉系统的研究是个十分复杂的问题,然而从频域角度分析拓扑知觉理论既具有一定生理依据和物理意义,又能很好的解释视觉认知的一些实验现象,而且能辩证统一以上两种对立的早期视觉认知理论,是很有发展前景的理论方向。
[Abstract]:There are two cognitive theories in the process of early visual cognition: the theory of "initial global perception" and the theory of "initial characteristic analysis", in which the theory of "initial global perception" regards visual cognition as "from a wide range to a wide range". The local nature of the cognitive process, The theory of "initial feature analysis" regards visual cognition as a cognitive process from local nature to large-scale nature. However, human visual cognitive system cannot simultaneously have two opposite cognitive routes. Based on the linear law of spatial frequency and average energy spectrum of natural image, the multichannel theory of visual frequency is studied in frequency domain, and the statistical model of spatial frequency and average energy spectrum of image is established. The theory of "initial global perception" and its famous experimental phenomena are reinterpreted by using the spatial frequency statistics of images. The main work of this paper is as follows:. 1. On the basis of the previous researches on the physiological characteristics of visual system and the multi-channel theory of visual information, the multi-channel theory of vision in spatial frequency domain is deeply studied. The feasibility of explaining topological perception by visual multi-channel theory is expounded from spatial frequency domain. 2. According to the statistical characteristics of spatial frequency and average energy spectrum of natural image, the statistical law calculation method of human visual cognition in spatial frequency domain is designed, and the corresponding statistical model of visual spatial frequency is established. 3.Using the frequency statistical model of visual space proposed in this paper, the famous experimental phenomena in Chen Lin's topological perception theory and the basic visual phenomena such as visual invariance are reinterpreted in frequency domain. Thus, the whole cognitive theory of vision is supplemented in frequency domain. The study of visual system is a very complicated problem. However, analyzing the theory of topological perception from the perspective of frequency domain not only has certain physiological basis and physical significance, but also can explain some experimental phenomena of visual cognition. Moreover, it is a promising theoretical direction to dialectically unify the two opposing early visual cognitive theories.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：R318.0

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