Читать книгу Recognition and Perception of Images - Группа авторов - Страница 14

Let’s specify some works with a focus on the questions relating to visual perception. The work of [Pepperell, 2019] deals with the conceptual problems of visual perception with respect to the field of art. The author is a painter, and some of his pictures in the context of which the phenomenon of perception of works of pictorial art (Figure 1.1.1) is envisaged are represented in the work. In the opinion of the author the science is based on rational descriptions, and the art uses artful, aesthetic and philosophical concepts. The statement of German von Helmholtz about the perception of the external environment is mentioned. The qualities of our senses are projected on the objects in the external environment. They seem to be colorful, red or green, cold or warm, with smell or taste. Even understanding that these concepts are subjective and belong to the properties of our nervous system, the art can help us understand the complicated perception problems.

In the opinion of the author the perception of the real world and perception of images of the real world represent the extremely knotty problem associated with the rationality notion. The study of these problems may help us achieve progress in understanding perception in the context of art and current scientific and intellectual breakthroughs.

The results of a study of neuroelectrical brain activity in the course of perception of a particular set of images are presented in the work of [Maglione et al., 2017]. The original (Original set) and stylized pictures by Titian and a contemporary painter were shown to the selected group of people who passed the art studies. The stylized pictures were got from the original ones by means of leaving the color patches (Color set) and contour forms (Style set) (Figure 1.1.2). The picture and its processed images of L.D. Kampan, the modern painter, are represented in the first row, and the picture by Tiziano Vecellio and the relevant processed analogs in the second row. The research subjects were randomly affected by the offered irritators.

In the course of experimentation it has been found that the Original set induced more emotions than other sets of pictures during the first 10 seconds. The emotions brought out by Color and Style sets were intensified in 30 seconds. However, the emotions held steady for the first Original set. The evidences of cortical activity stream from the parietal and central regions to prefrontal and frontal regions in the course of viewing of images of all data sets were detected throughout the whole experiment. This result is congruent with the idea that active perception of images with the sustained cognitive attention in the parietal and central regions leads to the forming of judgments about their aesthetic valuation in the frontal region of head.

Figure 1.1.1 “Grey on orange”, “Flower”, “Drawing drawing” [Pepperell, 2019].

Figure 1.1.2 Example of three groups of stimuli tested in study (Original, column (a); Style, column (b); Color, column (c) [Maglione et al., 2017]).

It has been found that different regions of the brain including not only the frontal but also the motional and parietal cortical layers take part in the valuation of perceivable stimuli. It is necessary to admit that the prefrontal dorsolateral brain cortex is selectively activated by the only stimuli considered to be attractive. At the same time, the prefrontal activity is generally activated during the valuation of both pleasant and unpleasant stimuli. The value of research is that the neuroelectric visualization may be used for receiving useful information relating to the evolution of the aesthetic view of people who perceive the images from simple stimuli to the works of art.

The work of [Tikhomirov et al., 2018] is dedicated to the study of agnosia of visual objects to determine the pathologies of the brain. The visual agnosia has arisen in the case of damage of brain cortex structure responsible for the analysis and synthesis of information thus leading to the violation of the perceptual process and recognition of visual stimuli. The contemporary views about the neuroanatomical and neurophysiological basis of the visual process are described. The medical cases of visual objects agnosia and peculiarities of neuropsycological diagnostics and post-hospital rehabilitation of patients are presented.

The visual objects of different origin such as object images, geometric figures, letters, words and faces with various emotional expressions were used for testing. The basic test models were based on the modified methods of Wundt (Figure 1.1.3(a)), Stroop’s method (Figure 1.1.3(b)) and Gottschaldt figures (Figure 1.1.3(c)). The error types, response duration and detection time were evaluated; the recommendations on the diagnostics of visual agnosia in the clinical practice were worked out.

Furthermore, we’ll analyze some main concepts relating to the biological evolution of organs of visual sensing, the structural features of the human eye as well as the process of processing and perception of visual information by the brain.

Figure 1.1.3 Examples of interactive realization of basic test models: (a) Wundt’s method; (b) interference test by Stroop’s method; (c) test by Gottschaldt figures [Tikhomirov et al., 2018].