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2015-08-26 09:07:11 -0600 | answered a question | Camera Preview slow on Android OpenCV +possible bottleneck found I' ve faced this problem either.
I' ve tried to decrease the camera resolution with However it is still slow. I' ve been trying to work parallel with Threads, but it is still 3.5FPS. My MultThread class is just like this |
2015-08-21 11:54:17 -0600 | asked a question | How can I draw rectangle with MatOfKeyPoint for Text Detection | Java Hi guys, I' ve been working on real time text detection and recognition with OpenCV4Android. Recognition part is totally completed. However, I have to ask question about text detection. I' m using the MSER FeatureDetector for detection text. This is the real time and calling the method part: And this is the basic MSER implementation: It works fine for finding text with edges mask. I would like to draw a rectangles for clusters like this: or this You can assume that I have the right points. As you can see, fd.detect() method is returning a MatOfKeyPoint. Hence I' ve tried this method for drawing rectangle: But when I was trying to Imgproc.arcLength() method, it suddenly stopped. I gave a random approxDistance value for Imgproc.approxPolyDP() method like 0.1, it doesn' t work really efficiently. So how can I draw rectangle for detected text? Cheers! |