How to get the size of a region in an image?

Question

Fat Man 2019-6-29

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/469455-how-to-get-the-size-of-a-region-in-an-image

评论： Image Analyst 2019-6-30

采纳的回答： KALYAN ACHARJYA

在 MATLAB Online 中打开

How can I get the size of the green region in the image??

By using funtion any() and sum() on my mask index

Or any other ways that the experts can come up with.

Thank you for your help.

img1 = imread(pic)
red1 = img1(:,:,1);
green1 = img1(:,:,2);
blue1 = img1(:,:,3);
get_green = red1 == 0 & green1 == 255 & blue1 == 0;
sup_mask = cat(3,get_green,get_green,get_green);

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Answer 1

KALYAN ACHARJYA 2019-6-29

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/469455-how-to-get-the-size-of-a-region-in-an-image#answer_381283

编辑：KALYAN ACHARJYA 2019-6-29

在 MATLAB Online 中打开

I can counts the number of pixels of that region

%Please note that white portion also there in both side of fridge
% Crop it or you can discard specifically
im=rgb2gray(imread('image_name'));
[rows colm]=size(im)
threshold_vale=?? % sme value try with the image
binary_image=im<threshold_vale
% Segmnet the Green part
% Now you have binary image with white "1" pixels, on that green region
tot_pix=sum(binary_image(:));
area_green_part=tot_pix/(rows*colm)
% You can replicate that number in cm also with co-relate with size of the original image