Kim N G, Turvey M T
Center for the Ecological, Study of Perception and Action, University of Connecticut, Storrs 06269-1020, USA.
J Exp Psychol Hum Percept Perform. 1998 Dec;24(6):1690-704. doi: 10.1037//0096-1523.24.6.1690.
Five experiments addressed the perception of curvilinear heading under various conditions of optical flow. Perception of heading was unaffected by optical noise (Experiment 1) and was successful and equally accurate for flows generated by circular and elliptical paths of locomotion (Experiment 2). In Experiment 3, random perturbations of vector magnitudes in general curvilinear fields did not reduce the accuracy of perceived heading. When vector directions were randomly perturbed in Experiments 4 and 5, curvilinear heading perception was impaired. Discussion focuses on the inappropriateness of the vector normal hypothesis to the general curvilinear case, the importance of the pattern of relative vector directions, and the practical and theoretical significance of investigating different forms of noncanonical optical flow.
五项实验研究了在各种光流条件下对曲线航向的感知。航向感知不受光学噪声的影响（实验1），并且对于由圆形和椭圆形运动路径产生的光流，感知是成功且同样准确的（实验2）。在实验3中，一般曲线场中向量大小的随机扰动并没有降低感知航向的准确性。在实验4和5中，当向量方向被随机扰动时，曲线航向感知受到损害。讨论集中在向量法线假设对于一般曲线情况的不适用性、相对向量方向模式的重要性，以及研究不同形式的非规范光流的实际和理论意义。
