flankechen's profile - activity

It seems that the ROI is not defined in top-left+width,height but chopping from the margin.

I got ROIs like:

    %YAML:1.0
validRoi1: !!opencv-matrix
   rows: 1
   cols: 4
   dt: i
   data: [ 60, 40, 36, 59 ]
validRoi2: !!opencv-matrix
   rows: 1
   cols: 4
   dt: i
   data: [ 14, 55, 45, 1 ]

and the max of data[0-3] referring left,top, right,bottom chopping pixels.

I have a 640*480 retify image and line(retify,Point(60,55),Point(480-45,640-59),Scalar(0,255,0),1); goes through the ROI successfully.

If these helps, please share what you see and why this ROI is not top-left+width,height like other opencv roi. I have seem others stereoRectify() out the top-left+width,height roi.

Strange.......

Of course, you can build OpenCV in static link and no manager is used (OpenCV will be integrated to your .apk).

Check this out here.

However, keep in mind that this will build a huge .apk

Thanks a lot. It works! And why convertto() is not working at all? BTW, where should I find these kinds of handbook for javacv?

I am developing an android opencv apps. Based on Opencv4android SDK tutorial 2- mixed process.

in the frame processing functionpublic Mat onCameraFrame(CvCameraViewFrame inputFrame) {}

since the Frame is RGBA and I want to make RGB by doing show

 mRgba = inputFrame.rgba();
 mGray = inputFrame.gray();

 Mat mRgb=new Mat(640,480,CvType.CV_8UC3);

 mRgba.convertTo(mRgb, CvType.CV_8UC3);

 PinkImage(mRgba.dataAddr());

I debug and log the things I passed to jni part, and I find it's not working at all. mRgb is CV_8UC4 even after the converto();

any idea for this?

point me out please, I write C++ opencv for a while and remember just a bit of java.

I am having exactly the same problem. saying that ....\lib\debug\opencv_core245d.lib is missing.