Comments on: Labeling labeled objects http://blogs.mathworks.com/steve/2006/11/17/labeling-labeled-objects/ Steve Eddins manages the Image & Geospatial development team at The MathWorks and coauthored Digital Image Processing Using MATLAB. He writes here about image processing concepts, algorithm implementations, and MATLAB. Sat, 11 Feb 2012 18:27:50 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Steve http://blogs.mathworks.com/steve/2006/11/17/labeling-labeled-objects/#comment-23088 Steve Mon, 10 May 2010 15:51:06 +0000 http://blogs.mathworks.com/steve/?p=94#comment-23088 Matteo—Glad it helped. As you discovered, bwboundaries does indeed trace boundaries by following consecutive pixels. Matteo—Glad it helped. As you discovered, bwboundaries does indeed trace boundaries by following consecutive pixels.

]]> By: Matteo http://blogs.mathworks.com/steve/2006/11/17/labeling-labeled-objects/#comment-23086 Matteo Mon, 10 May 2010 15:44:33 +0000 http://blogs.mathworks.com/steve/?p=94#comment-23086 Steve, this data cursor is great! I was trying to use bwboundaries to digitize some polygons from a scanned geological map. This worked quite well and I was going to use the result as a mask to parse coordinates from the matrices weith X and Y coordinates. But I was not sure if points in the boundary were stored as consecutive pixels or by row,columns from top left corner to bottom right. This helped me confirm points are stored as consecutive pixels. Thank you. Matteo Steve,

this data cursor is great! I was trying to use bwboundaries to digitize some polygons from a scanned geological map. This worked quite well and I was going to use the result as a mask to parse coordinates from the matrices weith X and Y coordinates. But I was not sure if points in the boundary were stored as consecutive pixels or by row,columns from top left corner to bottom right. This helped me confirm points are stored as consecutive pixels. Thank you.
Matteo

]]> By: Steve http://blogs.mathworks.com/steve/2006/11/17/labeling-labeled-objects/#comment-23048 Steve Sun, 25 Apr 2010 15:41:23 +0000 http://blogs.mathworks.com/steve/?p=94#comment-23048 Alis—Use the <tt>'PixelValues'</tt> option of the function <tt>regionprops</tt>. Alis—Use the 'PixelValues' option of the function regionprops.

]]> By: Alis http://blogs.mathworks.com/steve/2006/11/17/labeling-labeled-objects/#comment-23044 Alis Sun, 25 Apr 2010 12:57:43 +0000 http://blogs.mathworks.com/steve/?p=94#comment-23044 I missed:total pixel value for the coins at grayscale image(coins.png) Best regards Alis I missed:total pixel value for the coins at grayscale image(coins.png)
Best regards
Alis

]]> By: Alis http://blogs.mathworks.com/steve/2006/11/17/labeling-labeled-objects/#comment-23043 Alis Sun, 25 Apr 2010 12:53:34 +0000 http://blogs.mathworks.com/steve/?p=94#comment-23043 Dear Steve first I should thank to you for your great work ;-) and my question is if I want to know total pixel value of each coin and lable them then what should I do? Best regards Alis Dear Steve
first I should thank to you for your great work ;-)
and my question is if I want to know total pixel value of each coin and lable them then what should I do?
Best regards
Alis

]]> By: Kevin http://blogs.mathworks.com/steve/2006/11/17/labeling-labeled-objects/#comment-22920 Kevin Fri, 26 Mar 2010 13:28:06 +0000 http://blogs.mathworks.com/steve/?p=94#comment-22920 oh i see thx a lot for those precious tips Steve... ^^ oh i see thx a lot for those precious tips Steve… ^^

]]> By: Steve http://blogs.mathworks.com/steve/2006/11/17/labeling-labeled-objects/#comment-22902 Steve Tue, 23 Mar 2010 22:18:56 +0000 http://blogs.mathworks.com/steve/?p=94#comment-22902 Kevin—Glad you figured it out. All Image Processing Toolbox functions that work on binary images assume that 0-valued pixels are the background. To extract a single object, use the 'Image' option in regionprops. Kevin—Glad you figured it out. All Image Processing Toolbox functions that work on binary images assume that 0-valued pixels are the background. To extract a single object, use the ‘Image’ option in regionprops.

]]> By: Kevin http://blogs.mathworks.com/steve/2006/11/17/labeling-labeled-objects/#comment-22900 Kevin Tue, 23 Mar 2010 06:03:34 +0000 http://blogs.mathworks.com/steve/?p=94#comment-22900 I GOT IT!!!!! haha cant tell u how happy i am!!! was just a question of where to put the ~ omg... matlab is the best hehe I GOT IT!!!!! haha cant tell u how happy i am!!! was just a question of where to put the ~

omg… matlab is the best hehe

]]> By: Kevin http://blogs.mathworks.com/steve/2006/11/17/labeling-labeled-objects/#comment-22899 Kevin Tue, 23 Mar 2010 04:37:55 +0000 http://blogs.mathworks.com/steve/?p=94#comment-22899 sory if i am unclear - lets take the coin example above.. lets say i want to isolate object 2 and store only object 2 with the x and y axes limited to 1pixel above,below,to-the-right,to-the-left of the object in question, in an array.. How to do this? sory if i am unclear – lets take the coin example above.. lets say i want to isolate object 2 and store only object 2 with the x and y axes limited to 1pixel above,below,to-the-right,to-the-left of the object in question, in an array.. How to do this?

]]> By: Kevin http://blogs.mathworks.com/steve/2006/11/17/labeling-labeled-objects/#comment-22898 Kevin Tue, 23 Mar 2010 04:32:51 +0000 http://blogs.mathworks.com/steve/?p=94#comment-22898 i tried debugging but am getting a headache lol so i start from scratch - plz assist me in this query: is there an inbuilt function where i can isolate/constrict a labeled object (labeled using bwlabel and regionprops)? if not then how can i code it? i tried debugging but am getting a headache lol so i start from scratch – plz assist me in this query:

is there an inbuilt function where i can isolate/constrict a labeled object (labeled using bwlabel and regionprops)? if not then how can i code it?

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