{"id":69,"date":"2006-07-11T07:00:35","date_gmt":"2006-07-11T11:00:35","guid":{"rendered":"https:\/\/blogs.mathworks.com\/steve\/?p=69"},"modified":"2019-10-22T13:59:57","modified_gmt":"2019-10-22T17:59:57","slug":"input-from-tech-support","status":"publish","type":"post","link":"https:\/\/blogs.mathworks.com\/steve\/2006\/07\/11\/input-from-tech-support\/","title":{"rendered":"Input from tech support"},"content":{"rendered":"<p>\r\nRecently, our application support engineers gave a series of presentations to development groups. These presentations summarized calls received by tech support about different products. I thought I'd share some things that interested me in the presentation covering the Image Processing Toolbox.\r\n<\/p>\r\n\r\n<p>\r\nThere were a few \"customer-favorite\" functions mentioned. These included:\r\n<ul>\r\n<li> <tt>regionprops<\/tt> - Measure properties of image regions (blob analysis) <\/li>\r\n<li> <tt>bwlabel<\/tt> - Label connected components in binary image <\/li>\r\n<li> <tt>graythresh<\/tt> - Global image threshold <\/li>\r\n<li> <tt>imtool<\/tt> - Image navigation, viewing, and pixel inspection tool <\/li>\r\n<\/ul>\r\n<\/p>\r\n\r\n<p>\r\nThen there were the problem spots. Here are a couple of samples:\r\n<ul>\r\n<li> How different image types (grayscale, indexed, RGB, binary) work is a source of confusion.<br><br>\r\nIt's true - to use the Image Processing Toolbox effectively, it's important to understand the different ways that matrix values can correspond to pixel colors.  That's one reason I wrote <a href=\"https:\/\/blogs.mathworks.com\/steve\/?p=51\">several blog entries<\/a> on this very topic.  You might also want to look at the relevant chapter of the Users Guide. <br><br> <\/li>\r\n<li> Some users want to use <tt>cpselect<\/tt>, the control-point selection GUI, as part of the workflow in another GUI. Specifically, they want to write code that launches <tt>cpselect<\/tt>, waits for the user to select the control points, and then continue. Currently there's no real way to do that.<br><br>\r\nThe development team is actively exploring this particular use case, and we hope to have something to help you out in a future release.<\/li>\r\n<\/ul>\r\n<\/p>\r\n\r\n<p>\r\nDo you have any particular favorites or frustrations to share?  Feel free to leave a comment on the blog.\r\n<\/p>","protected":false},"excerpt":{"rendered":"<p>\r\nRecently, our application support engineers gave a series of presentations to development groups. These presentations summarized calls received by tech support about different products. I thought... <a class=\"read-more\" href=\"https:\/\/blogs.mathworks.com\/steve\/2006\/07\/11\/input-from-tech-support\/\">read more >><\/a><\/p>","protected":false},"author":42,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[166,82,180,168],"_links":{"self":[{"href":"https:\/\/blogs.mathworks.com\/steve\/wp-json\/wp\/v2\/posts\/69"}],"collection":[{"href":"https:\/\/blogs.mathworks.com\/steve\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.mathworks.com\/steve\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.mathworks.com\/steve\/wp-json\/wp\/v2\/users\/42"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.mathworks.com\/steve\/wp-json\/wp\/v2\/comments?post=69"}],"version-history":[{"count":4,"href":"https:\/\/blogs.mathworks.com\/steve\/wp-json\/wp\/v2\/posts\/69\/revisions"}],"predecessor-version":[{"id":3062,"href":"https:\/\/blogs.mathworks.com\/steve\/wp-json\/wp\/v2\/posts\/69\/revisions\/3062"}],"wp:attachment":[{"href":"https:\/\/blogs.mathworks.com\/steve\/wp-json\/wp\/v2\/media?parent=69"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.mathworks.com\/steve\/wp-json\/wp\/v2\/categories?post=69"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.mathworks.com\/steve\/wp-json\/wp\/v2\/tags?post=69"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}