c#中opencv图像平移旋转，直接能运行代码

在C#中，使用OpenCV库进行图像平移和旋转操作相对简单。首先，你需要安装OpenCVSharp NuGet包才能在.NET项目中使用它。以下是一个基本的例子展示如何对图像进行平移和旋转：

using OpenCvSharp;

// 加载图像
Mat image = Cv2.ImRead("path_to_your_image.jpg", ImreadModes.Color);

// 平移操作
Point2f translationVector = new Point2f(50, 50); // (x, y)偏移量
Mat translatedImage = new Mat();
Cv2.WarpAffine(image, translatedImage, TranslationMatrix(translationVector), image.Size());

// 旋转操作
double angleInDegrees = 45; // 旋转角度，单位是度
Point2f center = new Point2f(image.Width / 2, image.Height / 2);
double scale = 1;
Mat rotationMatrix = GetRotationMatrix(center, angleInDegrees, scale);
Mat rotatedImage = new Mat();
Cv2.WarpAffine(image, rotatedImage, rotationMatrix, image.Size(), InterpolationTypes.Bilinear, BorderMode.Constant, new Scalar(0));

// 定义辅助函数获取旋转矩阵
static Mat TranslationMatrix(Point2f vector)
{
    float[] matData = { 1, 0, -vector.X, 0, 1, -vector.Y, 0, 0, 1 };
    return new Mat(new MatOfFloat(matData), 3, 3);
}

static Mat GetRotationMatrix(Point2f center, double angle, double scale = 1.0)
{
    double cosa = Math.Cos(angle * Math.PI / 180);
    double sina = Math.Sin(angle * Math.PI / 180);
    return new Mat(
        new float[][] {
            { scale * cosa, -scale * sina, center.X - scale * cosa * center.X - scale * sina * center.Y },
            { scale * sina, scale * cosa, center.Y + scale * cosa * center.X + scale * sina * center.Y },
            { 0, 0, 1 }
        }, 3, 3);
}

// 保存处理后的图像
Cv2.ImWrite("translated_image.jpg", translatedImage);
Cv2.ImWrite("rotated_image.jpg", rotatedImage);