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Investigation on Temporal Property of Human Visual System

Author: XuTao
Tutor: HanFeng
School: Inner Mongolia University of Technology
Course: Measuring Technology and Instruments
Keywords: Human visual Time characteristics Delayed response characteristics Dynamic response characteristics
CLC: TP391.41
Type: Master's thesis
Year: 2010
Downloads: 67
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Abstract


The time response characteristics of the human visual system determines whether the person is able to get the real image of the moving object as well as its actual location, therefore, has long been widespread concern in biomedical, Television and Film, psychology, image processing and other fields. However, due to a visual image signal after transformation mechanism is very complicated and time characteristics of the human visual system has not been an accurate conclusion test of the human visual system has a certain degree of difficulty. Predecessors Most of the time characteristics of study of the visual system is the delayed response characteristics of the system, which led to a lot of controversy, and even difficult to explain some visual phenomenon. This article on the basis of these studies that the time characteristics of the human visual the delay response characteristics of the visual system and the dynamic response characteristics, and made a test method based on system identification theory. First of all, the test of the delayed response characteristics of the visual system uses eye tracking moving objects will generate an error position principle subjects tracking a moving target and the target positioning experimental program, use of time, the velocity of the object object movement distance of three mutually equivalent relationship will delay the response time of the visual system into erroneous positioning distance test, a high reliability of the results obtained by the large number of experiments. More importantly, the human visual system first proposed this concept different delay times, respectively, the test visual system response of the bright objects delay time of about 74ms, while the response delay time of the dark object on the bright and dark excitation response about 106 ms. This result is improved delay the response characteristics of the human visual system. Second, the time is adjustable pulse signal as a system of incentives, through behavioral experiments to complete the visual system of dynamic luminance signal response test. The test results reveal the visual intensity of the image according to the exponential relationship between the variation over time, to determine the time history of the establishment of new images or old images disappear. The test results were fitted with mathematical functions to obtain the mathematical model of the dynamic response characteristics of the visual system in the test conditions, and the mathematical model is extended to the general. In the grasp of two characteristics of the delayed response, and dynamic response of the visual system, by analyzing the relationship between the dynamic response of the visual system response delay is caused by the visual system. At the same time, the use of the above conclusions of the study explain the reasons for the blurred images of moving objects, multi-frame image fusion mechanism of the long-standing problem.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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