Research On Virtual Light Source Rendering Strategy Based On Visual Perceptual Features

With the improvement of hardware performance and the development of rendering technologies,computers have been able to restore real-world images to a high extent.In particular,the birth and development of new display technologies such as virtual reality provide new opportunities and challenges for rendering.As one of the most common objects in human visual impression,light source often appears in the applications of human factors research,lighting design and so on.However,it is difficult to restore the light source image actually seen by human eyes on the display device because the maximum brightness of the display hardware is far lower than the actual brightness of the real light source.Therefore,in this paper,the visual image features are attributed and modeled by studying the features of human visual perception,and a light source processing model for real-time rendering is proposed.Based on these results,the relationship between image features and perception is established to provide strategies for light source rendering.Starting from the features of visual perception,this paper theoretically analyzes the perception mechanism of luminous images in the order of optical signal transmission,reception and processing.According to the analysis results,the typical image features of the light source are extracted,and the real-time rendering model is built for each feature.On this basis,the effects of physical factors such as ambient illuminance,background luminance and light source intensity on image feature parameters are studied by matching virtual light source images with real light source visual images.According to the matching results,a set of parameter lookup table based on the above factors is established to realize the dynamic rendering strategy of light source.In addition,the relationship between image features and visual perception is studied,and the dynamic rendering strategy is compensated based on this relationship.Finally,the model is applied in the virtual reality environment,so that the light source rendering technology can be applied to the fields of human factors research,lighting design and so on at a lower cost.The relationship between light source image features and real physical parameters as well as subjective perceptual evaluation is studied in this paper.A set of real-time light source rendering model and an effective optimization strategy for the light source rendering is provided is also provided in this paper.