小编fWd*_*d82的帖子

[更新]:已添加屏幕截图.

我在下面的基础教程tutorial-1-camerapreview来自OpenCV的-3.4.1-Android的sdk_4.我想点击屏幕并获得该x y位置的RGB颜色.我得到了HERE的 帮助(在相机预览中从触摸事件中检索精确的RGB值):

获取xy坐标:

@SuppressWarnings("deprecation")
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        x = (int)event.getX();
        y = (int)event.getY();
        return super.onTouchEvent(event);
    }

onCameraFrame为:

public Mat onCameraFrame(CvCameraViewFrame inputFrame) {
        mRgba = inputFrame.rgba();
        if(x != -1 && y != -1) { //if this is true, you've touched something
            rgb = mRgba.get(x,y);

            Log.d(TAG, "Touch coordinates--> " + "x: " + String.valueOf(x)
                    + " y: " + String.valueOf(y) + " \n"
                    + "RGB values--> …