[英]How to capture an image in android with coordinates
Am new to android , and I would like place my problem in-front of you,, 我是Android新手,我想把问题摆在你面前,
I would like to capture an image between four coordinates , as below.. 我想捕获四个坐标之间的图像,如下所示。
First of all I convert the image into bitmap and then set it as background to a relative layout. 首先,我将图像转换为位图,然后将其设置为相对布局的背景。 And i know these four coordinates.
我知道这四个坐标。
Then how could I get the image inside the box and set it to another layout as background. 那我怎么能得到框内的图像并将其设置为另一个布局作为背景。
Guys please let me out from this logic.... 伙计们,请让我从这个逻辑中解脱出来......
finally i find the solution to my problem and i wana share it with you, 最后我找到了我的问题的解决方案,我和你分享了,
first of all, this is done based on the theory of transformation at +12 level. 首先,这是基于+12水平的转换理论完成的。 Ok, My problem is solved with the help of "OpenCv for Android "
好的,我的问题在“OpenCv for Android”的帮助下得到了解决
this is the code.. 这是代码..
public class MainActivity extends Activity implements CvCameraViewListener2,OnTouchListener
{
Bitmap sourceBitmap,descBitmap,sourceBitmap1;
ImageView view,view2;
SurfaceView amSurfaceView ;
Mat mRgba;
private CameraBridgeViewBase mOpenCvCameraView;
private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
@Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS:
{
Log.i("Yesssssssss", "OpenCV loaded successfully");
mOpenCvCameraView.enableView();
} break;
default:
{
super.onManagerConnected(status);
} break;
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// initialise bitmap for crop is here
Bitmap bitmap_source=BitmapFactory.decodeResource(getResources(), R.drawable.quadone);
if(bitmap_source==null)
Log.e("bitmap Null","nulllllll");
// these values should not exceed the limits of bitmap..
Log.e("Bitmap"," "+bitmap_source.getWidth()+" "+bitmap_source.getHeight());
sourceBitmap =BitmapFactory.decodeResource(getResources(), R.drawable.quadone);
sourceBitmap1 =BitmapFactory.decodeResource(getResources(), R.drawable.quadone);
descBitmap =BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
view = (ImageView) findViewById(R.id.imageView1);
view2=(ImageView) findViewById(R.id.imageView2);
view.setImageBitmap(sourceBitmap1);
view.setOnTouchListener(this);
mOpenCvCameraView = (CameraBridgeViewBase) findViewById(R.id.color_blob_detection_activity_surface_view);
mOpenCvCameraView.setCvCameraViewListener(this);
Log.e("MAtt","Startttttttttmmmmmmmmmtttttttt");
sourceBitmap =bitmap_source;
if (!OpenCVLoader.initDebug()) {
// Handle initialization error
}
Mat inputMat = new Mat();
Mat outputMat = new Mat();
descBitmap=sourceBitmap;
Utils.bitmapToMat(sourceBitmap, inputMat);
List<Point> src_pnt = new ArrayList<Point>();
Point p0 = new Point(0, 0);
src_pnt.add(p0);
Point p1 = new Point(10, 100);
src_pnt.add(p1);
Point p2 = new Point(100, 125);
src_pnt.add(p2);
Point p3 = new Point(90, 20);
src_pnt.add(p3);
Mat startM = Converters.vector_Point2f_to_Mat(src_pnt);
List<Point> dst_pnt = new ArrayList<Point>();
Point p4 = new Point(0.0, 0.0);
dst_pnt.add(p4);
Point p5 = new Point(0.0, sourceBitmap.getHeight());
dst_pnt.add(p5);
Point p6 = new Point(sourceBitmap.getWidth(), sourceBitmap.getHeight());
dst_pnt.add(p6);
Point p7 = new Point(sourceBitmap.getWidth(), 0);
dst_pnt.add(p7);
Mat endM = Converters.vector_Point2f_to_Mat(dst_pnt);
Mat perspectiveTransform = Imgproc.getPerspectiveTransform(startM, endM);
Size size = new Size(sourceBitmap.getWidth(), sourceBitmap.getHeight());
Scalar scalar = new Scalar(50.0);
Imgproc.warpPerspective(inputMat, outputMat, perspectiveTransform, size, Imgproc.INTER_LINEAR + Imgproc.CV_WARP_FILL_OUTLIERS, Imgproc.BORDER_DEFAULT, scalar);
Log.e("1=",""+inputMat.cols()+" "+inputMat.rows());
Log.e("outmat.."," "+outputMat.cols()+" "+outputMat.rows());
Utils.matToBitmap(outputMat, descBitmap);
view2.setImageBitmap(descBitmap);
// ram@san
}
@Override
public void onCameraViewStarted(int width, int height) {
// TODO Auto-generated method stub
Log.e("onCameraViewStarted","onCameraViewStarted");
}
@Override
public void onCameraViewStopped() {
// TODO Auto-generated method stub
Log.e("onCameraViewStopped","onCameraViewStopped");
}
@Override
public Mat onCameraFrame(CvCameraViewFrame inputFrame) {
// TODO Auto-generated method stub
mRgba= new Mat();
Utils.bitmapToMat(sourceBitmap, mRgba);
Utils.matToBitmap(mRgba, descBitmap);
view2.setImageBitmap(sourceBitmap);
return mRgba;
}
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
return false;
}
}
if any one have doubts please place it here.. 如果有人有疑问请把它放在这里..
have a happy codding, Ram.. 有一个快乐的编码,拉姆..
as for getting the image within the co-ordinates 至于在坐标内获取图像
Bitmap croppedBmp = Bitmap.createBitmap(originalBmp, startx, starty, endx, endy);
this will create a cropped bitmap like your after 这将创建一个像你之后的裁剪位图
This will (most probably) create an image from 4, 5, 6 etc. points that you click manually on the ImageView
to obtain. 这将(很可能)创建一个4,5,6等点的图像,您可以在
ImageView
上手动单击以获取该ImageView
。 This should work on more than 4 points selected. 这应该适用于超过4个选定的点。
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ImageView imageView = (ImageView) findViewById(R.id.img);
compositeImageView = (ImageView) findViewById(R.id.imageView);
Bitmap bitmap1=BitmapFactory.decodeResource(getResources(), R.drawable.drawable_android);
Bitmap bitmap2=BitmapFactory.decodeResource(getResources(), R.drawable.drawable_android_cr);
Bitmap resultingImage=Bitmap.createBitmap(320, 480, bitmap1.getConfig());
Canvas canvas = new Canvas(resultingImage);
Paint paint = new Paint();
paint.setAntiAlias(true);
Path path=new Path();
imageView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_DOWN){
// textView.setText("Touch coordinates : " +String.valueOf(event.getX()) + "x" + String.valueOf(event.getY()));
Log.e("X",String.valueOf(event.getX())+"");
Log.e("y",String.valueOf(event.getY())+"");
path.lineTo(String.valueOf(event.getX()), String.valueOf(event.getY()));
}
if(/*Touch count == 4 or 5 or 6 etc.*/){
canvas.drawPath(path, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap2, 0, 0, paint);
compositeImageView.setImageBitmap(resultingImage);
return true;
}
}
});
}
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