I am using a binary image of white and black pixels (see attached image). I want to plot the white area of pixels so I am using a code to count from top white pixel to the last white pixel of the pic.
heights = zeros(1, columns);
for col = 1 : size(seg,2)
thisColumn = seg(:, col);
topRow = find(thisColumn, 1, 'first');
bottomRow = find(thisColumn, 1, 'last');
heights(col) = bottomRow - topRow;
But plot doesn't seem right (see attached image). it should had the form and shape of the white area of the image, means a rectangle with a steep bottom.
Any reason why plot doesn't seem correct?