opencv c++鼠标拖动任意画多个圆并显示 dicom

您可以使用OpenCV C++库来实现鼠标拖动画多个圆的功能，并且可以结合DCMTK库来显示DICOM图像。具体步骤如下：

1. 读取DICOM图像并显示。您可以使用DCMTK库中的dcmimgle来读取和显示DICOM图像。具体实现代码如下：

#include <dcmtk/dcmimgle/dcmimage.h>
#include <opencv2/opencv.hpp>

int main() {
    DicomImage *image = new DicomImage("image.dcm");
    if (image->getStatus() != EIS_Normal) {
        delete image;
        return -1;
    }
    unsigned char *pixelData = (unsigned char*)image->getOutputData(8 /* bits per pixel */);
    cv::Mat mat(image->getHeight(), image->getWidth(), CV_8UC1, pixelData);
    cv::imshow("DICOM Image", mat);
    cv::waitKey();
    return 0;
}

2. 实现鼠标拖动画圆的功能。您可以使用OpenCV中的鼠标回调函数来实现鼠标拖动事件的捕捉，并在回调函数中实现画圆的功能。具体实现代码如下：

cv::Point center;
bool drawing = false;

void onMouse(int event, int x, int y, int flags, void* param) {
    if (event == cv::EVENT_LBUTTONDOWN) {
        center = cv::Point(x, y);
        drawing = true;
    } else if (event == cv::EVENT_MOUSEMOVE && drawing) {
        cv::Mat *image = (cv::Mat*)param;
        cv::circle(*image, center, cv::norm(center - cv::Point(x, y)), cv::Scalar(255, 0, 0), 2);
        cv::imshow("DICOM Image", *image);
    } else if (event == cv::EVENT_LBUTTONUP) {
        drawing = false;
    }
}

int main() {
    DicomImage *dcmImage = new DicomImage("image.dcm");
    if (dcmImage->getStatus() != EIS_Normal) {
        delete dcmImage;
        return -1;
    }
    unsigned char *pixelData = (unsigned char*)dcmImage->getOutputData(8);
    cv::Mat mat(dcmImage->getHeight(), dcmImage->getWidth(), CV_8UC1, pixelData);
    cv::namedWindow("DICOM Image");
    cv::setMouseCallback("DICOM Image", onMouse, &mat);
    cv::imshow("DICOM Image", mat);
    cv::waitKey();
    return 0;
}

这样，您就可以使用鼠标拖动画多个圆，并在DICOM图像上显示了。