video processing( find white pixel in binary image)

2015 11 23
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更新时间：2015 11 27
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currently my project is video processing and my problem is im trying to find white pixel of every row[[5X5] in the region of interest(ROI) that i assigned in my binary images.so that i can know if there is a pixel detected in that row. if it detected = 1, if not = 0.
can anyone help me please :(

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Thorsten
Thorsten 2015-11-23

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Sample data:
X = rand(5)>0.8;
Check if any pixel is 1
if any(X(:))
% do something
end

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Ariff pasha
Ariff pasha 2015-11-23
thanks thorsten.no 5 represent of 5 row isn't it?but can i know why the value is 0.8?
Thorsten
Thorsten 2015-11-23
This is just sample data. 5 creates a 5x5 matrix, as you mentioned. I used 0.8 to have some rows in X contaning only zeros, before I realized that probably when you talk about "row" in your question, you refer to the full 5x5 matrix. Or not?
Ariff pasha
Ariff pasha 2015-11-23
ROI_2=imcrop(SKELETON1,[411.5 68.5 27 111]);
sorry my bad. my problem is from the ROI i want to detect if there is a pixel exist in each columns(5columns in ROI). if each column detct the white pixel is = 1 even there is 1 white pixel as long as white pixel exist in that column. so i assume if all the column detect all white pixel[1 1 1 1 1] in it i will consider it as 100%.
Ariff pasha
Ariff pasha 2015-11-27
hi thorsten. now i want to find accuracy(100%).for example my roi size is 241x77.if all columns(77) detect 1 instead of 0 then i say its 100%. so i use yy= find(ROI_2(:,end)==1) to know which column has 1.

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