generic fourier descriptor
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hi i am implementing generic fourier descriptor in matlab.in one step i have to calculate the maximum radius of the shape.mostly my shapes will not be circular.the objects i have in my image are gun,knife,waterbottle,i dont have idea of calculating radius for these shapes in code.pleas help me on this...
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Walter Roberson
2012년 3월 1일
For any one shape, it would be the maximum distance between the centroid of the shape and any point in the shape. So if you were to place a circle at the centroid of the shape, then what is the smallest circle radius that would include every point in the shape?
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Lucas Silva
2017년 11월 25일
Use the following idea:
1 - Binarize the image so that you have only the object to be described
2 - Take the centroid of this figure and the extreme points, use the "regionprops" command to have information about these two characteristics
3 - Make the Euclidean distance from each extreme point to the centroid and take the biggest
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