matlab - Auto selecting square blob area from image : Computer Vision -

-

image processed trying develop auto calibration plugin, need average pixel value value of centre blob in image. of converting image binary, , able identify different blobs in image.

but, want central blob getting identified how. maybe can take of surrounding 6 small blobs.

original image: https://drive.google.com/open?id=0b9kvfpiocm1ewnhjegtbz3a4etg

matlab code:

i = imread('blob.tif'); ibw = ~im2bw(i, 0.75); ifill = imfill(ibw,'holes'); iarea = bwareaopen(ifill, 500);  stat = regionprops(ifinal,'boundingbox'); imshow(i); hold on; cnt = 1 : numel(stat)     bb = stat(cnt).boundingbox;     rectangle('position',bb,'edgecolor','r','linewidth',2); end

your results close. after perform conversion binary, thresholding , performing area opening, image:

enter image description here

there pixels along borders of pixels still around. can use imclearborder function remove pixels touching border. absolutely sure, use 8-connectedness searches pixels in 8 directions. default use 4-connectedness north, south, east , west only:

iclear = imclearborder(iarea, 8);

we image:

enter image description here

we're done. want entire blob detected, not different parts of blob. recommend fill of gaps using morphological closing operator. use structure element quite large ensure fill in gaps. square structure element of size 50 x 50 should work. use imclose in conjunction strel specify structure element:

se = strel('square', 50); out = imclose(iclear, se);

we get:

enter image description here

we can use above image mask mask out of image except blob of interest multiplying mask , image together. can use mask index image directly , setting pixels not belonging mask equal 0. let's opt second option. first make copy of image, indexing:

filt = i; filt(~out) = 0; imshow(filt);

we get:

enter image description here

it's not perfect, it's start. may have tweak parameters bit better.

good luck!


Comments

Post a Comment

Popular posts from this blog

php - How to display all orders for a single product showing the most recent first? Woocommerce -

-
i have password protected page on frontend. on page, want display full list of purchases associated single woocommerce product id. option 1: i've looked through woocommerce docs , , found: wc_cli_order , list_( $args, $assoc_args ) function lists orders. presumably, orders can filtered product id [--=] filter orders based on order property. line item fields (numeric array, started index zero): line_items.0.product_id option 2: i found article , based on customer id. i've modified code based on guesses meta_key , meta_value. $customer_orders = get_posts( array( 'numberposts' => -1, 'meta_key' => '_product', 'meta_value' => get_product_id(), 'post_type' => wc_get_order_types(), 'post_status' => array_keys( wc_get_order_statuses() ), ) ); how display orders single product showing recent order first? here solution put based on these articles: http://www.w...
Read more

asp.net - How to correctly use QUERY_STRING in ISAPI rewrite? -

-
i'm having difficult time , hope guys can help. using helicon isapi rewrite version 3.1.0.104 on our iis server. edit http.conf file , have tried , still fail. this trying do: redirect url: https://www.domain.com/switch-by-version?version=2.8.5.2594 to: https://test.domain.com/load/load.aspx?tver=2.8.5.2594 the version number @ end source url change, , need target url have same version number @ end of url example above shows. i tried following not work: rewritecond %{query_string} ^version=(\d\d?)\.(\d\d?)\.(\d\d?)\.(.*)$ [nc] rewriterule ^/switch-by-version(.*)$ https://test.domain.com/load/load.aspx?tver=%1 [r=307,nc,l] any appreciated! thanks. if it's running in equivalent context of .htaccess , rule shouldn't start / . here's simpler version: rewritecond %{query_string} ^version=(\d+\.\d+\.\d+(?:\..+)?)$ [nc] rewriterule ^switch-by-version/?$ https://test.domain.com/load/load.aspx?tver=%1 [r=307,nc,l]
Read more

angularjs - How restrict admin panel using in backend laravel and admin panel on angular? -

-
https://scotch.io/tutorials/token-based-authentication-for-angularjs-and-laravel-apps following tutorials, try write authentication restrict admin panel, didn't understood how can that. this admin panel, admin panel don't want show , request database unauthenticated users. my laravel-routes route::get('/admin',function(){ return view('index'); }); route::get('/api/v1/employees/{id?}', 'employees@index'); route::get('/api/v1/users/{id?}', 'employees@users'); route::post('/api/v1/employees', 'employees@store'); route::post('/api/v1/employees/{id}', 'employees@update'); route::delete('/api/v1/employees/{id}', 'employees@destroy'); route::group(['prefix' => 'api'], function() { route::resource('authenticate', 'authenticatecontroller', ['only' => ['index']]); route::post('authenticate', 'authentic...
Read more