zhang13404's profile - activity

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2013-04-01 20:57:44 -0600	commented answer	Part of picture i want to cut out part of the pictures according to the rect.Could you tell me opencv4android offer this way?
2013-04-01 20:56:31 -0600	commented question	Part of picture oh,sorry. i want to cut out part of the pictures according to the rect.Could you tell me opencv4android offer this way?
2013-03-28 03:39:23 -0600	received badge	● Student (source)
2013-03-28 02:05:44 -0600	asked a question	Part of picture Through Imgproc.boundingRect I won a rect object, now how I interception based on rect part of the picture?
2013-03-20 22:07:32 -0600	received badge	● Scholar (source)
2013-03-20 21:35:18 -0600	commented answer	about MatOfPoint2f Oh! I get it. I overlooked after findContours() i have List<MatOfPoint>. thank you very much~!
2013-03-20 21:13:34 -0600	commented answer	about MatOfPoint2f at first,thank you for you answer~ yes, you are right. in fact, I have done a similar deal with, such as canny, but after using canny, i have still Mat types, still need to convert Mat to MatOfPoint2f, what should i do?
2013-03-20 05:56:55 -0600	received badge	● Editor (source)
2013-03-19 22:51:54 -0600	asked a question	about MatOfPoint2f opencv4android 2.4.4 befort i use Imgproc.approxPolyDP, I want to convert Mat to MatOfPoint2f; `Mat initialImg = Highgui.imread("/sdcard/card.jpg", 0); MatOfPoint2f matOfPoint2f=new MatOfPoint2f(initialImg);` then I got the error: 03-20 10:35:57.825: E/AndroidRuntime(25073): java.lang.IllegalArgumentException: Incomatible Mat The error line is: `MatOfPoint2f matOfPoint2f=new MatOfPoint2f(initialImg);`