面向图像感知的轮廓力渲染技术研究  

Study on Contour Force Rendering Technology Oriented to Image Perception

作　　者：韩兴光[1] 李继婷[1] 王党校[1] 

机构地区：[1]虚拟现实技术与系统国家重点实验室北京航空航天大学机器人研究所,北京100191

出　　处：《系统仿真学报》2011年第4期713-718,共6页Journal of System Simulation

基　　金：国家自然科学基金(60605027);国家863计划项目(2007AA01Z310)

摘　　要：随着力觉交互技术的不断发展,力觉感知将在娱乐、助盲、科普等更多领域发挥作用。力觉渲染是实现逼真的力觉感知效果的关键问题。研究面向图像的二维轮廓力渲染技术,使用者操作二维力反馈鼠标与平面图像进行交互,通过鼠标的反馈力感知图像的轮廓形状。首先提取目标图像的边界轮廓,将离散的边界点拟合为有向轮廓线,然后基于虚拟工具和图像轮廓之间的位置关系和最小距离进行碰撞检测。基于轮廓力的连续性特征,提出一种轮廓力渲染算法,使系统获得较好的稳定性。设计了一个通过反馈的轮廓力来识别生肖动物的实验,分析了系统的实时性、稳定性以及对图像轮廓的识别率,验证了文中算法的可行性和有效性。With the development of the haptic interaction technology,the force perception will play an important role in more fields,such as in entertainment,blind help,and science popularity.Force rendering is a key problem to realize the realistic force perception.The image-based 2D contour force rendering method was investigated.The user interacted with the planar images by operating the 2D force feedback mouse.With the force feedback,the user could perceive the contour shape of the image.The target image boundary was firstly extracted and the discrete pixel points were fitted to a polygonal contour curve.Then the collision detection was done according to the relationship between the positions of the virtual tool and the contour as well as the minimum distance from the virtual tool point to the contour.Based on the continuity of the contour force,the contour force rendering algorithm was proposed which ensured the system stable.An experiment was conducted to identify the animal sign by the fedback contour force.The performance,including real time response,stability and recognition rate was analyzed which verified the feasibility and the effectiveness of the presented method.

关 键 词：轮廓拟合 碰撞检测 虚拟弹簧模型 轮廓力 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]