How to count the number of object present in binary image?

Hello sir, i am going to count the number of object present in binary image. so any of you please suggest me regarding counting object.because i have problem during count such object. thank you

[sanhita das]

sir,i want to show paragraphs from document image.pls tell the algoritm name. I attach a input file.and how to extract paragraph from this image.please help me

Answer 1

[Sabarinathan Vadivelu]

You can use bwconncomp.

cc = bwconncomp(yourBinaryImage,4);
number  = cc.NumObjects;

Answer 2

[Image Analyst]

Here's yet another way

[labeledImage, numberOfObject] = bwlabel(binaryImage);

[Image Analyst]

See my image segmentation tutorial http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862 for a complete demo.

[romaisa sabih]

sir,i have to count the active fingers in my image.how can i do this ? please help.

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/?term=tag%3A%22gesture+recognition%22

Answer 3

[David Sanchez]

If you are planning to do something with those objects, you could be interested in using regionprops. Besides the number of objects within the image, you can retrieve any other property of the objects, such as the area, centroid, orientation,....

BW = imread('text.png');
s  = regionprops(BW, 'Area');
N_objects = numel(C);

For all the options, take a look at

doc regionprops

[muhamad zulhairi zailan]

hello sir, how to count the object using area parameter, which mean i have the image and i want to count the object in that image using range of area parameter and i want to count the object refer to it area parameter? thanks sir your reply very appreciated.

[Image Analyst]

I don't know what you want. By the way, the code above is not correct. It should say

N_objects = length(s)

That number will be the same regardless which attributes you measure (area, perimeter, or whatever).