image - MATLAB ConnectedComponentLabeler does not work in for loop -


i trying set of binary images' eccentricity , solidity values using regionprops function. obtain label matrix using vision.connectedcomponentlabeler function.

this code have far:

files = getfiles('images'); ecc = zeros(length(files)); %eccentricity values sol = zeros(length(files)); %solidity values  ccl = vision.connectedcomponentlabeler;  i=1:length(files)      = imread(files{i});      [l num] = step(ccl, i);       j=1:num       l = changem(l==j, 1, j); %*     end      stats = regionprops(l, 'all');      ecc(i) = stats.eccentricity;     sol(i) = stats.solidity;  end

however, when run this, error says indicating line marked *:

error using connectedcomponentlabeler/step

variable-size input signals not supported when outputdatatype property set 'automatic'.'

i not understand matlab talking , not have idea how rid of it.

edit

i have returned bwlabel function , have no problems now.

the error bit hard understand, can explain means. when use cvst connected components labeller, assumes of images you're going use function are same size. error happens because looks images aren't... hence notion "variable-size input signals".

the "automatic" property means output data type of images automatic, meaning don't have worry whether data type of output uint8, uint16, etc. if want remove error, need manually set output data type of images produced labeller, or outputdatatype property static. hopefully, images in directory you're reading same data type, override field data type function accepts. available types uint8, uint16 , uint32. therefore, assuming images uint8 example, before run loop:

ccl = vision.connectedcomponentlabeler; ccl.outputdatatype = 'uint8';

now run code, , should work. bear in mind input needs logical have meaningful output.

minor comment

why using cvst connected component labeller when image processing toolbox bwlabel function works same way? using regionprops, have access image processing toolbox, should available you. it's simpler use , requires no setup: http://www.mathworks.com/help/images/ref/bwlabel.html


Comments

Post a Comment

Popular posts from this blog

c# - Validate object ID from GET to POST -

i have method allows user access comment have made on site. have post method lets them update comment. my normal solution send entire comment model through, let them update it, update on database when post back. involve sending commentid through in hiddenfor , can manipulated. how can verify commentid sent in get method same i'm getting in post , not able alter comment wish? how can verify commentid sent in method same i'm getting in post? basically have validate following things in post - user logged-in user. authenticated users post comments. commentid in post , should valid commentid , should present in database. userid associated logged-in user should same userid associated comment . comment should contain userid column, can check @ time of update. to make sure update happens comment has been sent in get - hold commentid in session , in post action compare commentid value in session .
Read more

node.js - Custom Model Validator SailsJS -

when using custom model validator checks record within model. return within spread doesn't seem end control flow. //post.js model /** * custom validator **/ types: { isuservalid: function(user_id) { var promise = require('bluebird'); promise.all([ user.findone({id: user_id}) ]) .spread(function(user) { console.log(user); if (user === null || user === undefined) { console.log('failed'); return false; }else{ console.log('passed'); return true; } }); } }, my response standard validation failed response. { "error": "e_validation", "status": 400, "summary": "1 attribute invalid", "model": "post", "invalidattributes": { "owner": [ { "rule": "isuservalid", ...
Read more

php - Find a regex to take part of Email -

i have following emails need extract part from: bestellnummer xxx: 1 von xxx, 1er pack ------------- anfang der nachricht ------------- foo bar baz foo bar baz // <<<<< need text here ------------- ende der nachricht ------------- ------------- anfang der nachricht ------------- foo bar baz foo bar baz ------------- ende der nachricht ------------- there 0 unlimited occurences of ------------- anfang der nachricht ------------- ------------- ende der nachricht ------------- and i'm able extract first part regex: $re = "/------------- .*? -------------.?(.*?).?------------- .*? -------------/s"; but, i'm quite new on learning regex, i'm pretty sure there must better regex extract part (foo bar baz foo bar baz) of text between ------------- anfang der nachricht ------------- ------------- ende der nachricht ------------- as can in different languages, i'm using .? to match between hyphens. i...
Read more