Path: news.mathworks.com!not-for-mail From: "Ignazioc calo" <ignazioc@gmail.com> Newsgroups: comp.soft-sys.matlab Subject: calculate distance on particular direction. Date: Sun, 3 Jul 2011 17:50:24 +0000 (UTC) Organization: The MathWorks, Inc. Lines: 9 Message-ID: <iuqa50$1um$1@newscl01ah.mathworks.com> Reply-To: "Ignazioc calo" <ignazioc@gmail.com> NNTP-Posting-Host: www-04-blr.mathworks.com Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Trace: newscl01ah.mathworks.com 1309715424 2006 172.30.248.35 (3 Jul 2011 17:50:24 GMT) X-Complaints-To: news@mathworks.com NNTP-Posting-Date: Sun, 3 Jul 2011 17:50:24 +0000 (UTC) X-Newsreader: MATLAB Central Newsreader 2921051 Xref: news.mathworks.com comp.soft-sys.matlab:734725 hi, i have a BW image, i found centroids and boundaries for each blob. now i need to calculate some distances between centroids and boundaries on particular directions. i solved the simple problem for 0/90/180/270 degrees, now i have some doubt for the other directions, like 45 or 30 degree.. i tried two possible solution: 1) rotate image and reuse the same approach used for orthogonal axes 2) check for every point in boundaries his angle with centroid, if this angle == 45 i found a point and i can calculate euclidean distance. i think both approaches aren't very smart and i'm pretty sure that someone here can show me a better way to solve this problem. thanks in advance..