MATLAB: How can i extract the curve from the skeletised ear image

biometricscurve detectionearImage Processing Toolbox

 i have a problem in extracting the curve of the ear, could someone help me please ?

Best Answer

Use bwareafilt() to extract the largest skeleton

binaryImage = bwareafilt(binaryImage, 1);

though it might not work if there are breaks in the main ear curve so that all the lines are shorter than the full ear length.

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MATLAB: How to deliver a sound tone to only one ear

You can simply add zeros in the silent channel:

t = linspace(0, 5, 22500*5);
y = sin(t * 1000 * 2 * pi);
silence = zeros(1, floor(0.5e-3 * 22500));  % 0.5 ms
signal = [y, silence; silence, y(:)].';
wavplay(signal, 22050);
% Draw the signal to check the phase shift:
plot(signal(1:100, :))

MATLAB: Finding outer and inner edge of an ear image

Regarding your new question about finding the "extreme endpoints", do you mean the two points that are farthest away from each other, or do you mean the actual endpoints of the line, which may not necessarily be the two points farthest from each other?

To find the two points farthest from each other, regardless if they're endpoints of a line/curve or somewhere in the middle of the curve, just so a nested for loop. Don't worry - it will be fast. See attached demo.

If you mean the endpoints of the curves only, then you need to get them using bwmorph(binaryImage, 'endpoints') and use the Pythagorean Theorem on all pairs of points.

Best Answer

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MATLAB: How to deliver a sound tone to only one ear

MATLAB: Finding outer and inner edge of an ear image

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