The independent detection of motion energy and counterchange: Flexibility in motion detection
نویسندگان
چکیده
منابع مشابه
The independent detection of motion energy and counterchange: Flexibility in motion detection
Motion perception is determined by changing patterns of neural activation initiated by spatiotemporal changes in stimulus features. Motion specified by 1st-order motion energy entails neural patterns that are initiated by spatiotemporal changes in luminance, whereas motion specified by counterchange entails oppositely signed changes in neural activation that can be initiated by spatiotemporal c...
متن کاملContrasting accounts of direction and shape perception in short-range motion: Counterchange compared with motion energy detection.
It has long been thought (e.g., Cavanagh & Mather, 1989) that first-order motion-energy extraction via space-time comparator-type models (e.g., the elaborated Reichardt detector) is sufficient to account for human performance in the short-range motion paradigm (Braddick, 1974), including the perception of reverse-phi motion when the luminance polarity of the visual elements is inverted during s...
متن کاملDetection and Tracking of Independent Motion
We describe an efficient method of using a translating camera to detect and track independently translating objects and assess the likelihood of a collision. By analysing the underlying geometry it is shown that the tracking is reduced to two independent linear searches for a single feature in the image plane. Results are presented for both an off-line implementation and work towards a real tim...
متن کاملDetection of Independent Motion Using Directional Motion Estimation
It is shown that the problem of independent motion detection can be addressed by analyzing constraints on low-dimensional directional (projected) components of ow elds. We construct a robust algorithm, implemented as a recursive lter, to extract directional motion parameters from long image sequences. Based on this a qualitative approach is described to detect independent motion, involving a co...
متن کاملAutomatic detection of liver tumor motion by fluoroscopy images
Background: A method to track liver tumor motion signals from fluoroscopic images without any implanted gold fiducial markers was proposed in this study to overcome the adverse effects on precise tumor irradiation caused by respiratory movement. Materials and Methods: The method was based on the following idea: (i) Before treatment, a series of fluoroscopic images corresponding to different bre...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Vision Research
سال: 2014
ISSN: 0042-6989
DOI: 10.1016/j.visres.2014.03.006