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@@ -45,3 +45,13 @@ blue or red after testing with some other images, i have decided to move circle closeness requirement higher to 35, as i got one very clear picture of th capball that scored a 32%. the diffrence in regularity is not good enough for distinguishing capball from particle.i some more testing with the blue ball and one of them was a false negative. 3 more false positives, also one of the particles was below the cut off area. another false negative red ball at 36%, ut it was really covered up by a lot if stuff. +1/17/2017 + I am finding a new way to detect holes in the ball by masking the image with the cotour to + be differentiated, and then find the area of the countours there, in V values, as a percentage of + the area of the main contour. + I just found out that ret is te threshhold value found, OTSU automatically finds a threshold value between two peaks in the histogram. I want to use this for the first threshold but the re values for hue are not contigous, I will use i just for the red component of BGR. adaptive threshholding takes into consideration lighting conditions, this will be used in the second level maskin +g.More info here:http://docs.opencv.org/trunk/d7/d4d/tutorial_py_thresholding.html + to make a mask from a contour, we simply make an empty image and draw the contours. we then threshhold the v value with adaptive thresholding, my fears about the 0s outside of the mask are unfounded.actually, it passess the entire black region as white. So i will do percentage of average instead. +function used: conmasked = cv2.adaptiveThreshold(conmasked, 255, cv2.ADAPTIVE_THRESH_GAUSSIAN_C, cv2.THRESH_BINARY, 11, 3) +I tried the mean of v in the contour, it only works on close ups, for now i guess we'll use size based ones. +I'm decreasing the minimum size. after decreasing the size to 1000, the number of false negatives decreased. The particle differentiation based on contour percentage works reasonably well when the image is not blurry. I think for balls this will be the final build |