MATLAB: Orientation of connected component in a binary image

binary imageimage processingImage Processing Toolboxlicence plate detectionorientation

hi friends can some one help me in finding orientation of each connected component in a binary image. To be more clear in the above image how to calculate that how much each white region is inclined? Basically i am working in number plate detection. I am able to locate number plate but some times number plate is locating but in parts. So depending on difference between angle of inclination of two connected regions i want to combine that particular two regions.

Thanks

Best Answer

Call regionprops(), asking it to return 'Orientation'. See my image segmentation tutorial if you need help.

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MATLAB: How to get all the orientation of the lines in a 2-D image

Use regionprops(). Something like

binaryImage = grayImage < 220;
props = regionprops(binaryImage, 'Orientation');
allAngles = [props.Orientation];

Let us know if you need a full demo, and if so, attach your full size image.

MATLAB: How to find the most common angle of line segments in a binary image

It sure would have been helpful if you had let us see your image. Other than that, since I'm working blind and guessing, I'd say to call regionprops() and get the origination, then get the average of those.

labeledImage = bwlabel(binaryImage);
measurements = regionprops(labeledImage, 'Orientation');
allAngles = [measurements.Orientation];
meanAngle = mean(allAngles);

Best Answer

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MATLAB: How to get all the orientation of the lines in a 2-D image

MATLAB: How to find the most common angle of line segments in a binary image

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