Malik.Mohrat's profile - activity

@berak convexity defects returns 4 things - start ,end and far points with "depth" integer

Hello ! i'm making an Android app to recognize hand gestures through convex hull and convexity defects . Everything is ok , but when I implemented the code for the very first time i got a lot of points (start,end and far) around the hand's contour maybe about 40-50 points . I tried many ways to filter these points to count hand's fingers but they all was unstable. Once,i read someone who filtered the points only through this line "if ( depth>20*256 )" , i tried it and it worked as charm to remove all unnecessary points Now my question is why does this work very well , why depth sometimes has value under 1000 and sometimes more than 5000 . thank you

lama123 what do u mean in look only in a small neighborhood around the ball after the first frame ?

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Hello ! i'm building an Android app to track a ball based in color , and did it through the color blob detector sample from OpenCV , send values to robot to follow it . every thing is alright , but my problem is when light changes a little (from place to place in the same room for example) the app miss the ball contour or it surround another color-related object it see in the surround area , so tracking process gone messy ! my question is what's the best way to solve this ? do I need to modify things in android camera to reduce those changes ? or I need something else to track not only color,like feature extracting and matching ? waiting for your answers thank you !

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Same problem here so what happened next to solve this ?