Bitmap bitmap=((BitmapDrawable)imageView.getDrawable()).getBitmap();
//Coordenada x do centro
int x = bitmap.getWidth()/2;
//Coordenada y do centro
int y = bitmap.getHeight()()/2;

int cor = bitmap.getPixel(x,y);

double bitmapWidth = bitmap.getWidth();
double bitmapHeight = bitmap.getHeight();
double imageViewWidth = imageView.getWidth();
double imageViewHeight = imageView.getHeigth();

int bitmapX = (int)(imageViewX * (bitmapWidth / imageViewWidht));
int bitmapY = (int)(imageViewY * (bitmapHeight / imageViewHeight));