how to calculate width and length of binary image?

I need to calculate width and length of the binary image... PLZ SUGGEST A WAY

Answer 1

[Image Analyst]

You can use the size() function:

[theLength, width] = size(binaryImage);

The first return argument, theLength, is the number of rows (the height), and the second output argument, width, is the number of columns.

As an aside, don't use length as the name of a variable since it's the name of a built-in function.

[Image Analyst]

If you want the width and height for each blob in the binary image, then you'll have to use regionprops as shown in my Image Segmentation Tutorial http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862

[sou]

Thanx sir

[sou]

But it returns the size of the whole image wat I gav.. But I need length width of the binary object in my image...

[Image Analyst]

Please see my demo. It will find the two most distant points in any arbitrarily shaped binary blob, shown by the red line in the image below. It also finds the length inside the blob of the perpendicular mid-point of the longest line, shown in magenta. Feel free to adapt as needed.

[sou]

Thanx for your help sir.... But there exist an error while executing this code.. nume1 is undefinedundefined function for logical plz say me wat it represents

[Image Analyst]

There is no error in my code - in fact I just copied and pasted and it worked just fine. You must have changed it and broke it. It looks like you wrote nume1 (with a one) instead of numel (ending in a lower case "L"). Correct your code and try again. Post your code if you have problems with your code.

[sou]

ok sir i will check this...

[sou]

sir but this gives wrong width for my image sir...

my image is in this link http://labs.fme.aegean.gr/decision/downloads in this link under martin2003 zip file New database pictures\normal superficiel cells are my images sir... plz try it

Answer 2

[Matt J]

The size() command?

    [Width,Length]=size(binaryImage);

[sou]

PLZ SUGGEST ME A WAY