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

Question

Hanuman Wable 2013-12-20

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https://ww2.mathworks.cn/matlabcentral/answers/110287-how-to-count-the-number-of-object-present-in-binary-image

移动：DGM 2023-2-13

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

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sanhita das 2018-4-7

移动：DGM 2023-2-13

result.bmp

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

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Answer 1

Sabarinathan Vadivelu 2013-12-20

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https://ww2.mathworks.cn/matlabcentral/answers/110287-how-to-count-the-number-of-object-present-in-binary-image#answer_118930

编辑：Sabarinathan Vadivelu 2013-12-20

在 MATLAB Online 中打开

You can use bwconncomp.

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

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Answer 2

Image Analyst 2013-12-20

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https://ww2.mathworks.cn/matlabcentral/answers/110287-how-to-count-the-number-of-object-present-in-binary-image#answer_118942

在 MATLAB Online 中打开

Here's yet another way

[labeledImage, numberOfObject] = bwlabel(binaryImage);

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romaisa sabih 2016-5-18

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

Walter Roberson 2016-5-18

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

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Answer 3

David Sanchez 2013-12-20

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https://ww2.mathworks.cn/matlabcentral/answers/110287-how-to-count-the-number-of-object-present-in-binary-image#answer_118931

在 MATLAB Online 中打开

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

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muhamad zulhairi zailan 2018-11-7

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.