无法使用 Android 在 OpenCV 中解析 putText()

Question

我正在使用 OpenCV 开发 OCR 应用程序。为此，我创建了onCameraFrame()，但显示“无法解析方法 putText()”。我从 stackOverFlow 中找到了一些答案，说

导入 org.opencv.core.Point;

但我已经导入了

org.opencv.core.Point; org.opencv.core.Scalar;

但仍然显示相同的错误。还有其他方法可以解决此错误吗？提前致谢。请帮我。

public Mat onCameraFrame(CameraBridgeViewBase.CvCameraViewFrame inFrame) {
Mat inputFrame = inFrame.rgba();

    inputFrame.copyTo(mRgba);

   switch (HelloV.viewMode) {

        case HelloV.VIEW_MODE_RGBA: {

            //cannot resolve method putText 
            Core.putText(mRgba, "Video Mode", new Point(10, 50), 3, 1, 

         new Scalar(255, 0, 0, 255), 2);

            // Update start recordtime until starting recording

        }break;

        case HelloV.SAVE_IMAGE_MAT: {

            long curTime = new Date().getTime();
  //cannot resolve method putText
    Core.putText(mRgba, "Record Mode", new Point(10, 50), 3, 1,                   

           new Scalar(255, 0, 0, 255), 2);
           long timeDiff = curTime - recordStart;   

           Log.i("timeDiff",Long.toString(timeDiff));

           if ( timeDiff < MAX_VIDEO_INTERVAL_IN_SECONDS) {
                if ((mframeNum % FRAME2GRAB) == 0) {
                    saveImageToArray(inputFrame);
                    mframeNum++;
                }
                else
                    mframeNum++;
            }
            else
            {
                mframeNum = 0;
                turnOffCapture();
            }
        }break;
        case HelloV.CAPT_STILL_IM :
        {
            saveImageToArray(inputFrame);

            //RIGHT HERE IS WHERE I NEED TO MODIFY!  CAPTURE IMAGE
            //WITH THE CAMERA INSTEAD OF USING THE PREVIEW.
            //IF I CAN DO THIS, WE CAN GET AND STITCH FULL-RES IMAGES...
            //Camera.Parameters params = mCamera.getParameters();
            //Mat theImage = imageCapturer.getCapturedImage(1);
            //saveImageToArray(theImage);
            HelloV.viewMode = HelloV.VIEW_MODE_RGBA;
        }
    }
    return mRgba;
}

Answer 1

这取决于Android的OpenCV库版本：3.0版本.putText()（与相同参数），从移动Core到Imgproc类。所以你应该使用：

Imgproc.putText(mRgba, "Video Mode", new Point(10, 50), 3, 1, new Scalar(255, 0, 0, 255), 2);

代替：

Core.putText(mRgba, "Video Mode", new Point(10, 50), 3, 1, new Scalar(255, 0, 0, 255), 2);

等等。