Glünder H
Institut für Medizinsche Psychologie, Ludwig-Maximilians-Universität München, Federal Republic of Germany.
J Opt Soc Am A. 1990 Feb;7(2):255-63. doi: 10.1364/josaa.7.000255.
The visual estimation of object velocity in systems of tuned bilocal detector units (simplified Hassenstein-Reichardt detectors) is investigated. The units contain delay filters of an arbitrary low-pass characteristic. Arrays of such detector units with identical delay filters are assumed to cover the plane of analysis. The global evaluation of the output signals of suitably arranged detector units is exemplified by the analysis of frontoparallel translations of rigid objects. The correlative method permits the estimation of the instantaneous object velocity, independently of object form. The time course of the resulting estimate is shown to be the convolution of the true velocity profile with a time-invariant kernel that depends solely on the impulse response of the delay filters and thus characterizes the analyzer system. The mathematical analysis of the processing principle is illustrated by considering idealized detector systems. The response of correlative motion analyzers to compound motion and to motion of nonrigid objects is discussed.
研究了在调谐双局部探测器单元系统（简化的哈森斯坦 - 赖夏特探测器）中对物体速度的视觉估计。这些单元包含具有任意低通特性的延迟滤波器。假设具有相同延迟滤波器的此类探测器单元阵列覆盖分析平面。通过对刚性物体的前平行平移分析，举例说明了对适当排列的探测器单元输出信号的全局评估。相关方法允许独立于物体形状估计瞬时物体速度。结果估计的时间过程显示为真实速度分布与一个时不变核的卷积，该核仅取决于延迟滤波器的脉冲响应，从而表征分析器系统。通过考虑理想化的探测器系统来说明处理原理的数学分析。讨论了相关运动分析器对复合运动和非刚性物体运动的响应。
