是否可以将旋转的图像复制到另一个具有opencv的图像的旋转的ROI？ [英] Is it possible to copy a rotated image into a rotatedrect ROI of another image with opencv?

问题描述

对不起，问了几乎相同的问题，但我已经尝试了很多方法，我仍然不能做我想做的，我甚至不确定它可能与opencv单独。
我已经旋转了一个图像，我想把它复制到另一个图像。问题是，无论什么方式，我裁剪这个旋转的图像，它总是复制在第二个图像的周围有一个非旋转的方形。从下面的图片可以看出（忘记了白色部分，这是确定）。我只是想删除条纹部分。
我相信我的问题是我的投资回报率，我复制图像，因为这个ROI是一个矩形，而不是一个RotatedRect。如下面的代码所示。

  cv :: Rect roi（Pt1.x，Pt1.y，ImageAd.cols ，ImageAd.rows）; 
 ImageAd.copyTo（ImageABC（roi））; 
  

但是我不能使用以下代码中的rotateRect ...

  cv :: RotatedRect roi（cent，sizeroi，angled）; 
 ImageAd.copyTo（ImageABC（roi））; 
  

那么有没有办法做我想要的在opencv？
谢谢！

在使用下面的方法和掩码后，我得到这个图像，如图所示被roi切断，我用它来说明图像中我要复制的地方旋转图像。基本上现在我已经屏蔽了图像，我如何选择将这个屏蔽的图像放在我的第二个图像。目前我使用一个矩形，但不会工作，因为我的形象不再是一个矩形，而是一个旋转的矩形。看看代码，看看我现在错误地做了它（它切断，如果我使更大的一个异常被抛出）。

  cv :: Rect roi（Pt1.x，Pt1.y，creditcardimg.cols，creditcardimg.rows）; 
 creditcardimg.copyTo（imagetocopyto（roi），mask）; 
  

解决方案

而不是投资回报率，您可以使用掩码进行复制，

$ b $

使用此掩码将源图像复制到目标图像

/ p>

查看下面的C ++代码

  RotatedRect rRect = RotatedRect（Point2f（140,115），Size2f（115,80），192）; 
  

使用绘制轮廓创建遮罩。

  Point2f vertices [4]; 
 rRect.points（vertices）; 
 Mat掩码（src.rows，src.cols，CV_8UC1，cv :: Scalar（0））; 
 vector <向量< Point> > co_ordinates; 
 co_ordinates.push_back（vector< Point>（））; 
 co_ordinates [0] .push_back（vertices [0]）; 
 co_ordinates [0] .push_back（vertices [1]）; 
 co_ordinates [0] .push_back（vertices [2]）; 
 co_ordinates [0] .push_back（vertices [3]）; 
 drawContours（mask，co_ordinates，0，Scalar（255），CV_FILLED，8）; 
  

最后使用上述掩码将来源复制到目的地。

  Mat dst; 
 src.copyTo（dst，mask）; 
  

Ok sorry for asking pretty much the same question again but I've tried many methods and I still can't do what I'm trying to do and I'm not even sure it's possible with opencv alone. I have rotated an image and I want to copy it inside another image. The problem is that no matter what way I crop this rotated image it always copies inside this second image with a non rotated square around it. As can be seen in the image below.(Forget the white part thats ok). I just want to remove the striped part. I believe my problem is with my ROI that I copy the image to as this ROI is a rect and not a RotatedRect. As can be seen in the code below.

cv::Rect roi(Pt1.x, Pt1.y, ImageAd.cols, ImageAd.rows);
ImageAd.copyTo(ImageABC(roi));

But I can't copyTo with a rotatedRect like in the code below...

cv::RotatedRect roi(cent, sizeroi, angled);
ImageAd.copyTo(ImageABC(roi));

So is there a way of doing what I want in opencv? Thanks!

After using method below with masks I get this image which as seen is cut off by the roi in which I use to say where in the image I want to copy my rotated image. Basically now that I've masked the image, how can I select where to put this masked image into my second image. At the moment I use a rect but that won't work as my image is no longer a rect but a rotated rect. Look at the code to see how I wrongly do it at the moment (it cuts off and if I make the rect bigger an exception is thrown).

cv::Rect roi(Pt1.x, Pt1.y, creditcardimg.cols, creditcardimg.rows); 
        creditcardimg.copyTo(imagetocopyto(roi),mask);

解决方案

Instead of ROI you can use mask to copy,

1. First create mask using rotated rect.

2. Copy your source image to destination image using this mask

See below C++ code

Your rotated rect and I calculated manually.

RotatedRect rRect = RotatedRect(Point2f(140,115),Size2f(115,80),192);

Create mask using draw contour.

   Point2f vertices[4];
   rRect.points(vertices);
   Mat mask(src.rows, src.cols, CV_8UC1, cv::Scalar(0));
   vector< vector<Point> >  co_ordinates;
   co_ordinates.push_back(vector<Point>());
   co_ordinates[0].push_back(vertices[0]);
   co_ordinates[0].push_back(vertices[1]);
   co_ordinates[0].push_back(vertices[2]);
   co_ordinates[0].push_back(vertices[3]);
   drawContours( mask,co_ordinates,0, Scalar(255),CV_FILLED, 8 );

Finally copy source to destination using above mask.

    Mat dst;
    src.copyTo(dst,mask);

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