Distance bethween two regions

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Ektor Lucci 2013-9-12

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Good evening, I have to measure the distance between the two regions, as shown in the image, in a sequence of 1800 frames in succession. The distance varies frames by frames. I have difficulty in finding the minimum distance between these two. I enclose a picture type. thank you very much

http://i43.tinypic.com/16c17jn.jpg

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Ektor Lucci 2013-9-18

in the picture I have used the imdistline. I have to create a loop to make sure that detects the distance between the two white regions in an automatic way.

Ektor Lucci 2013-9-18

http://tinypic.com/view.php?pic=2dcho2u&s=5#.UjnrC8a-18E

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采纳的回答

Image Analyst 2013-9-18

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https://ww2.mathworks.cn/matlabcentral/answers/87075-distance-bethween-two-regions#answer_97157

在 MATLAB Online 中打开

Try this:

% Get a thick band of pixels
band = grayImage(42:68, :);
% Get the mean horizontal profile by
% averaging along rows within each column.
horizontalProfile = mean(band, 1);
% Threshold to find dark area
darkPixels = horizontalProfile < 128' % Or whatever value...
% Find starting column
startingColumn = find(darkPixels, 1, 'first');
% Find ending column
endingColumn = find(darkPixels, 1, 'last');