{"id":21,"date":"2005-05-27T06:03:11","date_gmt":"2005-05-27T14:03:11","guid":{"rendered":"http:\/\/evanlenz.net\/blog\/?p=21"},"modified":"2005-05-27T06:07:03","modified_gmt":"2005-05-27T14:07:03","slug":"visual-intelligence-and-line-construction","status":"publish","type":"post","link":"https:\/\/evanlenz.net\/blog\/2005\/05\/27\/visual-intelligence-and-line-construction\/","title":{"rendered":"Visual intelligence and line construction"},"content":{"rendered":"<p><a href=\"http:\/\/www.amazon.com\/exec\/obidos\/ASIN\/0393319679\/manalangcom-20?dev-t=D2B1IIRG931JN5%26camp=2025%26link_code=sp1\" title=\"Visual Intelligence: How We Create What We See\"><img src=\"http:\/\/images.amazon.com\/images\/P\/0393319679.01.MZZZZZZZ.jpg\" alt=\"Visual Intelligence: How We Create What We See\" \/><\/a><\/p>\n<p>This morning&#8217;s reading is for my <a href=\"http:\/\/depts.washington.edu\/dxintro\/2\/\">class<\/a>. It&#8217;s from a book called <a href=\"http:\/\/www.amazon.com\/exec\/obidos\/ASIN\/0393319679\/manalangcom-20?dev-t=D2B1IIRG931JN5%26camp=2025%26link_code=sp1\" title=\"Visual Intelligence: How We Create What We See\">Visual Intelligence: How We Create What We See<\/a>. One of the things it talks about is how our brain constructs lines from the light that enters our eyes:<\/p>\n<blockquote><p>And that is what you do each time you see a line. You construct it from receptor responses. This is not so easy as you might think. Just ask researchers in computer vision. They have worked on &#8220;edge detection&#8221; or &#8220;line finding,&#8221; an apparently simple problem, for decades. They have made progress, but their current solutions require much computation&#8211;on the order of tens of millions of multiplications and additions just to construct lines in one small image. Even so, their performance is no match to yours.<\/p><\/blockquote>\n<p>Constructing a line from what clearly looks like a line seems like a pretty easy problem. (Of course it would.) But after recently working with the &#8220;bitmap trace&#8221; feature in products like Adobe Illustrator and Macromedia Flash, which tries to recognize lines in order to create vectors from pixels, I can vouch for the fact that computer scientists still have a long way to go when it comes to the &#8220;line finding&#8221; problem. &#8220;I see the line so clearly, why can&#8217;t the computer?!&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This morning&#8217;s reading is for my class. It&#8217;s from a book called Visual Intelligence: How We Create What We See. One of the things it talks about is how our brain constructs lines from the light that enters our eyes: And that is what you do each time you see a line. You construct it [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[2],"tags":[],"_links":{"self":[{"href":"https:\/\/evanlenz.net\/blog\/wp-json\/wp\/v2\/posts\/21"}],"collection":[{"href":"https:\/\/evanlenz.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/evanlenz.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/evanlenz.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/evanlenz.net\/blog\/wp-json\/wp\/v2\/comments?post=21"}],"version-history":[{"count":0,"href":"https:\/\/evanlenz.net\/blog\/wp-json\/wp\/v2\/posts\/21\/revisions"}],"wp:attachment":[{"href":"https:\/\/evanlenz.net\/blog\/wp-json\/wp\/v2\/media?parent=21"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/evanlenz.net\/blog\/wp-json\/wp\/v2\/categories?post=21"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/evanlenz.net\/blog\/wp-json\/wp\/v2\/tags?post=21"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}