Greetings, how to extract each object and calculate their area based on example picture shown below.

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alice shaarveina 2018-3-14

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/388254-greetings-how-to-extract-each-object-and-calculate-their-area-based-on-example-picture-shown-below

评论： alice shaarveina 2018-3-15

采纳的回答： KALYAN ACHARJYA

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Image Analyst 2018-3-14

How is this different than your other post https://www.mathworks.com/matlabcentral/answers/387906-greetings-how-to-calculate-area-and-parameter-of-cell#comment_544813

alice shaarveina 2018-3-15

I need to extract each of the object then calculate the area. last time i tried the coding given in other post but sadly i don't get output only error. Hope anyone can help me solve this.

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Answer 1

KALYAN ACHARJYA 2018-3-14

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/388254-greetings-how-to-extract-each-object-and-calculate-their-area-based-on-example-picture-shown-below#answer_310015

在 MATLAB Online 中打开

k=imread('cell.bmp');
BW1=im2bw(k);
BW2=imcomplement(BW1);
% Apply condition calculate the pixels in certain boundary area (objects)
% Once you find white pixels, sum all upto certain boundary (Hint from given image)
% following is the code for all objects 
nWhite_pixels=sum(BW2(:));
[rows columns depth]=size(BW2);
percentage_tot_area=((nWhite_pixels)/(rows*columns))*100;
fprintf('#The Percentage covered by all object is %f',percentage_tot_area);
disp('%');