Question

I have this code :

protected Bitmap processFrame(byte[] data) {
    Mat mat = new Mat(mFrameHeight, mFrameWidth, CvType.CV_8UC3);
    mat.put(0, 0, data);

    //process mat with native code

    Utils.matToBitmap(mat, mBitmap);

    return mBitmap;
}


private Camera.PreviewCallback previewCallback = new Camera.PreviewCallback() {

    public void onPreviewFrame(byte[] data, Camera camera) {
        Bitmap bmp = processFrame(data);

        if (bmp != null) {
            //draw bmp
        }
    }
};

at some point I define the bitmap as:

mBitmap = Bitmap.createBitmap(mFrameWidth, mFrameHeight, Bitmap.Config.RGB_565);

The result is the same camera frames captured but in gray scale repeated 3 times horizontally, I tried CvType.CV_8UC4 and they are repeated 4 times instead.

I need to display the whole image as is using the same steps

Does anybody catch the mistake ??

Answer 1

Just changed this method .. it is solved ..

protected Bitmap processFrame(byte[] data) {

    Mat mYuv = new Mat( mFrameHeight + mFrameHeight/2, mFrameWidth, CvType.CV_8UC1);
    mYuv.put(0, 0, data);

    Mat mRGB = new Mat();

    Imgproc.cvtColor(mYuv, mRGB, Imgproc.COLOR_YUV2RGB_NV21, 3);

    ProcessFrame(mRGB.getNativeObjAddr(), mRGB.width(), mRGB.height());

    Utils.matToBitmap(mRGB, mBitmap);

    return mBitmap;
}