And we simply remove all the noise selecting the element with the biggest area (which is supposed to be the pupil) and skip al the rest. EyeLink eye trackers are capable of detecting changes in pupil size of just 0.1 of the pupil diameter, and their high sampling. _, threshold = cv2.threshold(gray_roi, 3, 255, cv2.THRESH_BINARY_INV)įrom the threshold we find the contours. Researchers are increasingly using eye trackers to explore changes in pupil size (pupillometry) in order to reveal insights into cognitive processes. gray_roi = cv2.cvtColor(roi, cv2.COLOR_BGR2GRAY) First conversion to grayscale and then we find the threshold to extract only the pupil. No matter where the eye is looking at and no matter what color is the sclera of the person. By converting the image into grayscale format we will see that the pupil is always darker then the rest of the eye. We’re going for the easiest approach possible, and probably the best solution anyway. When the eye is looking straight the sclera is well balanced on left and right side.įor the detection we could use different approaches, focusing on the sclera, the iris or the pupil. Starting from the left we see that the sclera cover the opposite side of where the pupil and iris are pointing. The cause of Adie's pupil usually is unknown but it can be caused by trauma, surgery, lack of blood flow (ischemia) or infection. Let’s take a look at all possible directions (in the picture below) that the eye can have and let’s find the common and uncommon elements between them all. Adie's tonic pupil (also called Adie's pupil, tonic pupil, or Adie's syndrome) usually affects only one eye, with the affected pupil being larger than the pupil of the unaffected eye. Now we can dive deeper into finding the right approach for the detection of the motion. Gray_roi = cv2.GaussianBlur(gray_roi, (7, 7), 0) Gray_roi = cv2.cvtColor(roi, cv2.COLOR_BGR2GRAY)
In this way we are restricting the detection only to the pupil, iris and sclera and cutting out all the unnecessary things like eyelashes and the area surrounding the eye. Let’s now select an Roi (region of interest). import cv2Ĭap = cv2.VideoCapture("eye_recording.flv") We import the libraries Opencv and numpy, we load the video “eye_recording.flv” and then we put it in a loop so tha we can loop through the frames of the video and process image by image. The ophthalmologists at EyeHealth Northwest are Portland, Oregons premier specialists for cataracts, LASIK, dry eyes, glaucoma and more. And later on we will think about the solution to track the movement.
#Eye with no pupil code#
Also, he has been telling his story at the Venice Beach Freakshow in Los Angeles, and he was featured on a recent episode of the AMC reality series Freakshow.Let’s now write the code of the first part, where we import the video where the eye is moving. So, he's trying to make money from his missing eyeball by performing as a zombie in music videos and at haunted houses like The Goretorium in Las Vegas. When he removes a dental plate, he can stick his finger in that eye and have it come out of his mouth. Now there's a giant hole where Owen's right eye used to be. In his case, the cancer has spread so extensively that doctors had to remove half his face, including his right eye, the muscles, and nerves. 13, 2009, the doctor gave him the news: he had sinonasal undifferentiated carcinoma (SNUC), a rare form of cancer affecting the nasal cavity that had only a 10 percent survival rate.
However, nagging sinus issues changed his life. Losing your entire right eyeball will do that to you.īack then, Owen was a successful motorcycle mechanic with a loving wife and a six-month old son. Billy Owen says he started seeing things in a new light back in February of 2009.
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