Abstract:
:Thresholds for the detection of rotation and divergence in the presence of a translational component in sparse random dot patterns are determined for human observers and two computer algorithms. The algorithms only make use of local velocity directions and not of local velocity magnitude (speed). The results show that psychophysical performance in this task can be well described without the need of specialized mechanisms tuned to either rotation or divergence. Possibly, integration of information over more than two frames occurs for low velocities. For high velocities the correspondence problem seems to limit performance.
journal_name
Vision Resjournal_title
Vision researchauthors
Kappers AM,te Pas SF,Koenderink JJ,van Doorn AJdoi
10.1016/0042-6989(96)00070-3subject
Has Abstractpub_date
1996-11-01 00:00:00pages
3539-47issue
21eissn
0042-6989issn
1878-5646pii
0042-6989(96)00070-3journal_volume
36pub_type
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