Detect pupil from the picture of the eye











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I have this video. I want to detect and draw a circle around the pupil.
This is a frame from that video.
Pupil frame



I want to analyze the change in size of the pupil after the eye is illuminated.



Things I tried.

- Rotate the image to make it upright.

- Using Haar Cascade to detect the eye in an image.

- Detecting the Iris using hough circles.

- Isolating the iris by cropping the image.

- Binarized the image with various thresholds to find inner circle(Pupil)

- Did contour detection on each output of diffent binarizations.



This approach works on some samples but fails on most others and gives a lot of false positives.



Please suggest some alternative approach.










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    up vote
    -1
    down vote

    favorite












    I have this video. I want to detect and draw a circle around the pupil.
    This is a frame from that video.
    Pupil frame



    I want to analyze the change in size of the pupil after the eye is illuminated.



    Things I tried.

    - Rotate the image to make it upright.

    - Using Haar Cascade to detect the eye in an image.

    - Detecting the Iris using hough circles.

    - Isolating the iris by cropping the image.

    - Binarized the image with various thresholds to find inner circle(Pupil)

    - Did contour detection on each output of diffent binarizations.



    This approach works on some samples but fails on most others and gives a lot of false positives.



    Please suggest some alternative approach.










    share|improve this question
























      up vote
      -1
      down vote

      favorite









      up vote
      -1
      down vote

      favorite











      I have this video. I want to detect and draw a circle around the pupil.
      This is a frame from that video.
      Pupil frame



      I want to analyze the change in size of the pupil after the eye is illuminated.



      Things I tried.

      - Rotate the image to make it upright.

      - Using Haar Cascade to detect the eye in an image.

      - Detecting the Iris using hough circles.

      - Isolating the iris by cropping the image.

      - Binarized the image with various thresholds to find inner circle(Pupil)

      - Did contour detection on each output of diffent binarizations.



      This approach works on some samples but fails on most others and gives a lot of false positives.



      Please suggest some alternative approach.










      share|improve this question













      I have this video. I want to detect and draw a circle around the pupil.
      This is a frame from that video.
      Pupil frame



      I want to analyze the change in size of the pupil after the eye is illuminated.



      Things I tried.

      - Rotate the image to make it upright.

      - Using Haar Cascade to detect the eye in an image.

      - Detecting the Iris using hough circles.

      - Isolating the iris by cropping the image.

      - Binarized the image with various thresholds to find inner circle(Pupil)

      - Did contour detection on each output of diffent binarizations.



      This approach works on some samples but fails on most others and gives a lot of false positives.



      Please suggest some alternative approach.







      python opencv machine-learning computer-vision object-detection






      share|improve this question













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      share|improve this question










      asked Nov 7 at 10:22









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