how to find centroid of each conneted component of a Binary Image in matlab, and represent each connected component with its centroid..??

Hi, I want to represent each connected component with its centroid, after finding centroid of each connected component , i want to represent each connected component with its centroid????

Answer 1

[Image Analyst]

That's exactly what my Image Segmentation Tutorial does, https://www.mathworks.com/matlabcentral/fileexchange/25157-image-segmentation-tutorial

It finds centroids, weighted centroids, and bounding boxes.

Answer 2

[Walter Roberson]

regionprops and ask for centroid.

Please explain more about what you mean by "represent" the component with its centroid

[Mohammad Bhat]

After decomposing binary image into different connected components, I want to form bounding box for each connected component or object, thereafter, I have to take or represent each bounding box with its center or centroid.

[Mohammad Bhat]

For representation I mean , I have to throw rest pixels, only take representative pixel that might be center, centroid or any other..

[Ranu Bhardwaj]

https://in.mathworks.com/matlabcentral/answers/28996-centroid-of-an-image

go through this link.

[Mohammad Bhat]

After forming bounding box for each connected component, I have to take center of bounding box....

[Image Analyst]

Are you sure you want that, or do you want the centroid like you originally said? My code gives you the bounding box, the centroid, and the weighted centroid, all of which could be at a different location. The center of the bounding box is simply the average of the top row and bottom row, and the same in the horizontal direction. Note that the center of the bounding box, as well as the two centroids may not actually lie inside the blobs. It's possible it could be outside it.

Answer 3

[Mohammad Bhat]

Sir, What do you suggest, If I have to take the representation of a bounding box. Which will be more representative center,centroid and any other.Whether they are in or outside of blob doesn't matter. As far as they are representative....

[Image Analyst]

All measurements describe properties of the blob. To know which you should measure, you need to define what "representative" means to you. Out of dozens of things that could possibly be measured, which ones would be useful to you? I have no idea - I mean, you haven't even allowed us to see one of your images so what can I say?

[Mohammad Bhat]

Sir, I want to represent Handwritten Indian word in a Holistic way, by using Graph representation. To give graph representation I am following below way:- 1. After necessary Image Pre-processing like Binarisation, Thinning etc. 2. I am inverting Branch ,start and end points in an binary image, to get the different connected components. 3. I am further decomposing each connected component by following some particular criteria (i am inverting foreground pixel at regular intervals such as at the distance of D, user specific) 4. Then I am forming bounding box for each connected components. 5. In order to represent each bounding box i am taking the center of each connected component (such that each center of bounding box can be termed as vertex of a graph.) 6. After that , I am getting vertices, then following anycriteria for edge connection I will get a Graph...

[Mohammad Bhat]

Here are the rest figures..

[Mohammad Bhat]

Some more figures

[Mohammad Bhat]

Sir, Is there any suggestion or where I can refine it....thanks in advance