How many white pixels in selected pixels?
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I'm selecting one particular column and then selecting 100 rows on image. That means I'm extracting 100 pixels from image. Now I want to know how to find how many white pixels (>200 gray value) are in the selected pixels. Could you please write down that code?
% read image
im = imread('6.jpg');
% convert to gray scale image
imgray = rgb2gray(im);
% size of the gray image
[r,c] = size(imgray);
% ask user to enter column number
fprintf('Column Number Should be between 1 and %d \n',c);
col = input('Please Select a column: ');
% ask user to input starting row number
fprintf('Rows should be bwtween 1 and %d \n',r);
start_row = input('Please Select starting Row Number: ');
% ask user to input ending row number
end_row = input('Please Select ending Row Number: ');
% extracted rows from the column
ext_rows = imgray(start_row:end_row,col);
I want to know how many white pixels (>200 value) in selected pixels?