A reversed structure-from-motion effect for simultaneously viewed stereo-surfaces.pdfVIP

下载本文档

8
0
约4.83万字
约 12页
2017-03-16 发布于天津
举报
版权申诉

A reversed structure-from-motion effect for simultaneously viewed stereo-surfaces.pdf

1、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。。
2、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
3、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。
4、该文档为VIP文档，如果想要下载，成为VIP会员后，下载免费。
5、成为VIP后，下载本文档将扣除1次下载权益。下载后，不支持退款、换文档。如有疑问请联系我们。
6、成为VIP后，您将拥有八大权益，权益包括：VIP文档下载权益、阅读免打扰、文档格式转换、高级专利检索、专属身份标志、高级客服、多端互通、版权登记。
7、VIP文档为合作方或网友上传，每下载1次，网站将根据用户上传文档的质量评分、类型等，对文档贡献者给予高额补贴、流量扶持。如果你也想贡献VIP文档。上传文档

A reversed structure-from-motion effect for simultaneously viewed stereo-surfaces.pdf

Vision Research 46 (2006) 1230–1241 /locate/visres A reversed structure-from-motion e?ect for simultaneously viewed stereo-surfaces Julian Martin Fernandez *, Bart Farell Institute for Sensory Research, Syracuse University, Syracuse, NY 13244, USA Received 22 July 2004; received in revised form 24 October 2005 Abstract A spatially ?at stimulus is perceived as varying in depth if its velocity structure is consistent with that of a three-dimensional (3D) object. This is structure from motion (SFM). We asked if the converse e?ect also exists. A motion-from-structure e?ect would skew an object?s perceived velocity structure to make it more consistent with the 3D structure provided by its depth cues. This proposed phenomenon should be opposite in sign from velocity constancy and could potentially interfere with it. Previous tests of velocity constancy compared stimuli presented at di?erent times, not simultaneously. This explains why a reversal of SFM has not been previously reported, as it is expected to appear only for simultaneous presentations. We tested this prediction using random-dot stereograms to de?ne two adjacent moving surfaces separated in stereoscopic depth. We found that subjects did not perceive velocity constancy with either simultaneous or sequential stimulus presentations. For sequential presentations, subjects matched retinal speeds, in agreement with previous work. However, for simultaneous presentations, the nearer surface was seen as moving faster when both surfaces were moving with the same retinal speed, an e?ect opposite in polarity from velocity constancy and a signature of the motion-from-structure phenomenon. ó 2005 Elsevier Ltd. All rights reserved. Keywords: Velocity constancy; Structure from motion; Binocular disparity; Binocular vision; Speed discrimination; Motion from structure 1. Introduction Structure from motion (SFM) is a non-veridical percept in which the retinal motion ?eld of a 3D object is perceived as having a depth structure c