Group values based on Frequency density











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I am trying to detect the number of columns within a image containing a table. I have used OpenCV to find contours within the image. After a little tuning I have the following image:



enter image description here



Using the data from the x axis, I have created a histogram to show me the frequency density on the axis.



enter image description here



This plot shows the higher concentration at coordinates containing text. You can see 9 such group, same as the number of columns. What I wish to do now is to extract the coordinates within those groups so that I can get the min and the max and hence capture the start pixel and end pixel of the columns. i.e.
Get values with following windows: 0-150, 150-250 ..etc.



I'll input multiple tables with different styling. I wish to automatimally detect such density clusters within the plot and group those values together.










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    up vote
    0
    down vote

    favorite












    I am trying to detect the number of columns within a image containing a table. I have used OpenCV to find contours within the image. After a little tuning I have the following image:



    enter image description here



    Using the data from the x axis, I have created a histogram to show me the frequency density on the axis.



    enter image description here



    This plot shows the higher concentration at coordinates containing text. You can see 9 such group, same as the number of columns. What I wish to do now is to extract the coordinates within those groups so that I can get the min and the max and hence capture the start pixel and end pixel of the columns. i.e.
    Get values with following windows: 0-150, 150-250 ..etc.



    I'll input multiple tables with different styling. I wish to automatimally detect such density clusters within the plot and group those values together.










    share|improve this question


























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I am trying to detect the number of columns within a image containing a table. I have used OpenCV to find contours within the image. After a little tuning I have the following image:



      enter image description here



      Using the data from the x axis, I have created a histogram to show me the frequency density on the axis.



      enter image description here



      This plot shows the higher concentration at coordinates containing text. You can see 9 such group, same as the number of columns. What I wish to do now is to extract the coordinates within those groups so that I can get the min and the max and hence capture the start pixel and end pixel of the columns. i.e.
      Get values with following windows: 0-150, 150-250 ..etc.



      I'll input multiple tables with different styling. I wish to automatimally detect such density clusters within the plot and group those values together.










      share|improve this question















      I am trying to detect the number of columns within a image containing a table. I have used OpenCV to find contours within the image. After a little tuning I have the following image:



      enter image description here



      Using the data from the x axis, I have created a histogram to show me the frequency density on the axis.



      enter image description here



      This plot shows the higher concentration at coordinates containing text. You can see 9 such group, same as the number of columns. What I wish to do now is to extract the coordinates within those groups so that I can get the min and the max and hence capture the start pixel and end pixel of the columns. i.e.
      Get values with following windows: 0-150, 150-250 ..etc.



      I'll input multiple tables with different styling. I wish to automatimally detect such density clusters within the plot and group those values together.







      python numpy opencv histogram detection






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      share|improve this question








      edited Nov 11 at 2:45









      eyllanesc

      69.6k93052




      69.6k93052










      asked Nov 11 at 2:43









      Lezwon Castellino

      133




      133





























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