A TARGET IN REAL MOTION APPEARS BLURRED IN THE ABSENCE OF OTHER PROXIMAL MOVING TARGETS
A TARGET IN REAL MOTION APPEARS BLURRED IN THE ABSENCE OF OTHER PROXIMAL MOVING TARGETS
复制标题
DOI：
10.1016/0042-6989(94)00308-9
复制
发表时间：
1995-08-01
期刊：
影响因子：
1.8
通讯作者：
OGMEN, H
中科院分区：
文献类型：
--
作者：
CHEN, S;BEDELL, HE;OGMEN, H
对于长于约40毫秒的曝光持续时间，据报道，采样运动中的点场看起来比从静态显示器的视觉持久性预测的拖影要少，这种感觉到的拖影的减少归因于运动“去模糊”机制，然而，人们很早就认识到，在暗场中连续运动的孤立目标似乎受到了广泛的拖累。为了调和这些明显相互矛盾的观察结果，我们研究了在密度从0.75到7.5点/度(2)的网点区域中，网点密度对单个移动网点酸的可感知涂抹程度的影响。明亮的目标在光照亮的背景场上连续运动，结果与之前相互矛盾的观察结果相一致，结果表明，在长于约50毫秒的曝光时间内，感知涂抹的长度随点密度系统地减小。在另外三个实验中，我们安排了目标的空间构型，以评估运动去模糊主要是由运动补偿机制(如假设的运动机制的时空定向接受场内的整合)还是来自时空相邻目标施加的抑制造成的。结果表明，运动机制的激活不是运动去模糊的充分条件，而感知拖尾的减少需要时空相邻目标的存在，这些发现表明，运动去模糊主要是由时空近端目标施加的掩蔽造成的。
For exposure durations longer than about 40 msec, a field of dots in sampled motion has been reported to appear less smeared than predicted from the visual persistence of static displays, This reduction of perceived smear has been attributed to a motion ''deblurring'' mechanism, However, it has been long recognized that an isolated target moving continuously in a dark field appears to be extensively smeared. To reconcile these apparently contradictory observations, we investigated the effect of dot density on the extent of perceived smear for a single moving dot acid for fields of dots with densities ranging from 0.75 to 7.5 dots/deg(2). Bright targets were presented in continuous motion against a photopically illuminated background field, The results reconcile previous conflicting observations by showing that the length of perceived smear decreases systematically with dot density for exposure durations longer than about 50 msec, In three additional experiments, we arranged the spatial configuration of the targets to evaluate whether motion deblurring results primarily from a motion compensation mechanism (such as integration within the spatiotemporally oriented receptive fields of putative motion mechanisms) or from inhibition exerted by spatiotemporally adjacent targets. The results show that the activation of motion mechanisms is not a sufficient condition for motion deblurring and that the reduction of perceived smear requires the presence of spatiotemporally adjacent targets, Taken together, these findings suggest that motion deblurring results primarily from masking exerted by spatiotemporally proximal targets.