How to define a metric for similarity between two lines in radon form?












0












$begingroup$


I have a line given by r, theta, where



theta corresponds to the line's angle from the X axis



r corresponds to the distance from a given point "the center" to the line.



A clear plot of the paramaterization of such a line is given here



I have n such lines



I want to find the line(s) which are most 'similar' to the given line, from the given set.



I figured the Euclidean distance in the r, theta space won't catch the similarity between the lines well.



I figured a good metric would be one that takes the area between the lines into account (small area would be similar lines)




  1. I'm sure there is a somewhat standard way for problems like this.


  2. Please give me some formula that gives the similarity.



I would specify more requirements, but I don't really know what they are yet before seeing any appropriate metric.










share|cite|improve this question









$endgroup$

















    0












    $begingroup$


    I have a line given by r, theta, where



    theta corresponds to the line's angle from the X axis



    r corresponds to the distance from a given point "the center" to the line.



    A clear plot of the paramaterization of such a line is given here



    I have n such lines



    I want to find the line(s) which are most 'similar' to the given line, from the given set.



    I figured the Euclidean distance in the r, theta space won't catch the similarity between the lines well.



    I figured a good metric would be one that takes the area between the lines into account (small area would be similar lines)




    1. I'm sure there is a somewhat standard way for problems like this.


    2. Please give me some formula that gives the similarity.



    I would specify more requirements, but I don't really know what they are yet before seeing any appropriate metric.










    share|cite|improve this question









    $endgroup$















      0












      0








      0





      $begingroup$


      I have a line given by r, theta, where



      theta corresponds to the line's angle from the X axis



      r corresponds to the distance from a given point "the center" to the line.



      A clear plot of the paramaterization of such a line is given here



      I have n such lines



      I want to find the line(s) which are most 'similar' to the given line, from the given set.



      I figured the Euclidean distance in the r, theta space won't catch the similarity between the lines well.



      I figured a good metric would be one that takes the area between the lines into account (small area would be similar lines)




      1. I'm sure there is a somewhat standard way for problems like this.


      2. Please give me some formula that gives the similarity.



      I would specify more requirements, but I don't really know what they are yet before seeing any appropriate metric.










      share|cite|improve this question









      $endgroup$




      I have a line given by r, theta, where



      theta corresponds to the line's angle from the X axis



      r corresponds to the distance from a given point "the center" to the line.



      A clear plot of the paramaterization of such a line is given here



      I have n such lines



      I want to find the line(s) which are most 'similar' to the given line, from the given set.



      I figured the Euclidean distance in the r, theta space won't catch the similarity between the lines well.



      I figured a good metric would be one that takes the area between the lines into account (small area would be similar lines)




      1. I'm sure there is a somewhat standard way for problems like this.


      2. Please give me some formula that gives the similarity.



      I would specify more requirements, but I don't really know what they are yet before seeing any appropriate metric.







      geometry metric-spaces linear-transformations






      share|cite|improve this question













      share|cite|improve this question











      share|cite|improve this question




      share|cite|improve this question










      asked Jan 7 at 16:33









      GulzarGulzar

      1013




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