6 Replies Latest reply: Jan 22, 2004 7:40 AM by 807582 RSS

    webcam moyion capture

    807582
      HI , i was wondering if anybody could help me. I want to compare a image of a face from a webcam to another image of a face. They only have to be still images. The images only have to match at about 70% of each other. I know that i will use the pixelGrabber method. How do i go about implementing this problem?

      Many thanks
      Joe.
        • 1. Re: webcam moyion capture
          807582
          It's pretty simple, really

          System.captureWebCam().compareToPreviousPicture(pic, .7)
          • 2. Re: webcam moyion capture
            807582

            Start off here... I posted code to capture images from a Web cam using JMF
            http://forum.java.sun.com/thread.jsp?forum=28&thread=452747

            ( Download latest JMF 2.1.1e ( Windows/Linux performance version, and carefully read the install guide )

            That'll get you the web cam capture bit.
            Comparing photos ?
            Here's another thread I replied to on that subject...

            http://forum.java.sun.com/thread.jsp?forum=1&thread=480410

            all the answers are out there if you search !

            regards,
            Owen
            • 3. Re: webcam moyion capture
              807582
              That pretty cool Owen. I'm very impressed!

              As far as comparing pictures/images, you could do a pixel by pixel comparison, but it's not going to do very well.

              Suppose, for example, that picture 2 is one pixel off to the left or right. The two pictures are the same, but doing a pixel by pixel comparison might rank them as very different.

              I would guess You need some sort of AI that does pattern matching
              • 4. Re: webcam moyion capture
                807582
                Thanks very much all
                Very helpfu
                • 5. Re: webcam moyion capture
                  807582

                  No problem.
                  Not that it affected my reply, but going by the e-mail address in your profile, I assume you're in Ireland too?

                  Ps. if you're using the web cam capture code I posted, there's a bug when switching video resolution.
                  You have to request the visual component again, remove the old one, and add it back to the container.
                  ( cos it may have been invalidated during the video resolution / format switch. )

                  cheers,
                  Owen
                  • 6. Re: webcam moyion capture
                    807582
                    Thanks Owen,

                    Yeah i was trying to fix that. But onby minor. The code is very helpfull and gives a much clearer indication of what i want to do and new ideas.

                    Im in Dublin, trying to work hard on this project. Coming together now, next part is the image comparision, which i saw your thread already. Havnt got it working properly yet.
                    As you probably already know, Sun are coming to Dublin on the 20th of Feb for a developers conference. Its free, all you have to do is register online. Limited places and its in the Davenport Hotel.

                    Joe