matlab - Use more points to define imroi object -


in short: wondering if possible, when using roi base classes (imroi actually) such impoly, imfreehand , others increase number of points (i.e. increase sensitivity) generated getposition method.

sample code:

consider following code, in i:

1) read , display image

2) call imfreehand draw closed region of interest.

3) call getposition nx2 array in coordinates defining freehand object draw stored.

4) call scatter see actual coordinates recorded.

clear clc close  %// read , display image = imread('coins.png');  imshow(a)  %// set imroi object hroi = imfreehand(gca,'closed',1);  %// position nx2 array roiposition = getposition(hroi);  %// display points retrieved getposition method. hold on  scatter(roiposition(:,1),roiposition(:,2),20,'r','filled')

after zooming on roi drawn, this:

enter image description here

which 1 can see lack couple points describe object.

to put in other words, possible obtain nx2 array getposition method n larger default (whose value don't know)? searched on web couldn't find relating issue.

thanks!

if not late, there alternative method coordinates using bwboundaries() on mask of roi object hroi created.

here example :

a = imread('coins.png'); imshow(a) hroi = imfreehand(gca, 'closed', 1); bw = createmask(hroi); b = bwboundaries(bw); b = b{:}; hold on scatter(b(:,2), b(:,1),20, 'r', 'filled')

Comments

Post a Comment

Popular posts from this blog

php - failed to open stream: HTTP request failed! HTTP/1.0 400 Bad Request -

this code i'm using find latitude , longitude of place: function coords($address){ echo $url="http://maps.googleapis.com/maps/api/geocode/json?address=".$address; $json = file_get_contents(urlencode($url)); $data = json_decode($json, true); print_r($data['results'][0]['geometry']['location']['lat']); print_r($data['results'][0]['geometry']['location']['lng']); } however returns warning: failed open stream: http request failed! http/1.0 400 bad request if use above code in simple procedure works fine not in function. note: have tried curl_init()... method produced same result? instead of encoding whole url encode address part. following code work fine $add='jamshoro phase 2'; $url="http://maps.googleapis.com/maps/api/geocode/json?address=".urlencode($add); $json = file_get_contents($url); $data = json_decode($json, true); print_r($data['r
Read more

java - How to filter a backspace keyboard input -

i have code gives message when key number pressed: txtvalueofclause.addeventfilter(keyevent.key_typed, new eventhandler<keyevent>() { @override public void handle(keyevent t) { char ar[] = t.getcharacter().tochararray(); char ch = ar[t.getcharacter().tochararray().length - 1]; if (!(ch >= '0' && ch <= '9')) { system.out.println("the char entered not number"); t.consume(); } } }); now if press on wrong button , press backspace remove it, error message. how can add backspace input if statement? i have found answer: txtvalueofclause.addeventfilter(keyevent.key_typed, new eventhandler<keyevent>() { @override public void handle(keyevent t) { char ar[] = t.getcharacter().tochararray(); char ch = ar[t.getcharacter().tochar
Read more

java - Show Soft Keyboard when EditText Appears -

i have code in android app, alert dialog , keyboard, , when dialog shown want keyboard appear. not , not sure why? here code: final alertdialog.builder alert = new alertdialog.builder(this); alert.settitle("title"); alert.setmessage("message"); final edittext input = new edittext(this); input.setinputtype(inputtype.type_class_number); alert.setview(input); input.setonfocuschangelistener(new view.onfocuschangelistener() { @override public void onfocuschange(view v, boolean hasfocus) { if (hasfocus) { log.i(tag, "in focus"); inputmethodmanager inputmethodmanager = (inputmethodmanager) getsystemservice(context.input_method_service); inputmethodmanager.showsoftinput(input, inputmethodmanager.show_implicit); } } }); but keyboard not appear though edit text in focus, , tell appear why, doesn't come up? thanks in advance.
Read more