{"id":35561,"date":"2014-10-27T16:41:08","date_gmt":"2014-10-27T16:41:08","guid":{"rendered":"http:\/\/www.labri.fr\/perso\/barla\/blog\/?p=35561"},"modified":"2018-05-03T08:55:50","modified_gmt":"2018-05-03T08:55:50","slug":"conjoint-invariants","status":"publish","type":"post","link":"https:\/\/www.labri.fr\/perso\/barla\/blog\/?p=35561","title":{"rendered":"Conjoint appearance invariants"},"content":{"rendered":"<p id=\"top\" \/>Material and shape are intertwined in the way they convey cues about each other. For instance, a strong invariant for glossy\/shiny objects is the way reflections are curved and\/or diverge more toward silhouettes. This is a conjoint shape\/material invariant w.r.t. lighting.<\/p>\n<p>Such general patterns of distortion are more readily perceived when they come in familiar form, as with ground\/sky gradients reflected off undulating waters, high-curvature edges attracting nearby highlights, near flat surface regions showing a filtered image of the environment lighting, engravings appearing with high contrast due to alternations of lights and darks in shading, etc.<\/p>\n<p>These configurations represent a higher level of analysis than mere differential or statistical ones, but are restricted to special cases that are likely to occur in an animal\/human environment. They are likely to correspond to common settings in evolution, and may have been studied and carefully reproduced in paintings.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Material and shape are intertwined in the way they convey cues about each other. For instance, a strong invariant for glossy\/shiny objects is the way reflections are curved and\/or diverge more toward silhouettes. This is a conjoint shape\/material invariant w.r.t. lighting. Such general patterns of distortion are more readily perceived when they come in familiar &#8230; <a title=\"Conjoint appearance invariants\" class=\"read-more\" href=\"https:\/\/www.labri.fr\/perso\/barla\/blog\/?p=35561\" aria-label=\"Read more about Conjoint appearance invariants\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[651],"tags":[],"class_list":["post-35561","post","type-post","status-publish","format-standard","hentry","category-thoughts"],"_links":{"self":[{"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=\/wp\/v2\/posts\/35561","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=35561"}],"version-history":[{"count":4,"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=\/wp\/v2\/posts\/35561\/revisions"}],"predecessor-version":[{"id":39695,"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=\/wp\/v2\/posts\/35561\/revisions\/39695"}],"wp:attachment":[{"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=35561"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=35561"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=35561"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}