基于多尺度叠加的视觉距离模糊算法的研究

Research of Visual Distance Blur Algorithm Based on Multi-Scale Overlay

为能够模拟观察距离变大时引起的颜色视觉效应,研究了人眼视觉的视锐度特性和对比敏感度特性。通过对人眼视锐度原理的分析,实现了视锐度方法模拟视觉距离增大时的视觉模糊算法;通过对对比敏感度模型测试原理的分析,结合人眼视觉空间频率的多通道特性,实现了基于对比敏感度函数模型模拟视觉距离增大时的视觉模糊算法。视锐度方法可简单模拟视觉距离增大时的模糊效果,可用于观察灰度物体情况。观察彩色物体时,通过使用反差敏感度模型算法,能够模拟视觉感知的多尺度特性、低通和带通滤波特性、局部适应性和颜色感知的叠加性。

In order to simulate the visual effects caused by the change of visual distance, the visual acuity and contrast sensitivity function are researched. The principle of visual acuity and the test method of human contrast sensitivity model are analyzed. Considering of human vision characters, the visual acuity blur algorithm has been presented. It is able to simulate the visual blurred effect, when the visual distance is increased. This algorithm can be used to observe the gray object. Simultaneously the other algorithm is also presented based on contrast sensitivity model, it is capable of simulating the multi-scale characteristics of human visual perception, the visual characteristic of low-pass and band-pass filter, local contrast adaptability and color overlay. When the visual distance is increasing, it is able to simulate the visual blur effects to abserve color objects.