使用 C++ 构建时出现 Opencv 错误

Question

我正在使用 OpenCV 在 C++ 中创建用于更改检测的代码，但是如果我更改图像，此代码会显示运行时错误

void MainWindow::on_pushButton_2_clicked()
{

    cv::Mat input1 = cv::imread("C:\\Users\\trainee2017233\\Desktop\\pre-post\\sulamani_ms1p1_pre_gref.tif");
    cv::Mat input2 = cv::imread("C:\\Users\\trainee2017233\\Desktop\\post-post\\sulamani_ms1p1_pre_gref.tif");

    cv::Mat diff;
    cv::absdiff(input1, input2, diff);

    cv::Mat diff1Channel;
    // WARNING: this will weight channels differently! - instead you might want some different metric here. e.g. (R+B+G)/3 or MAX(R,G,B)
    cv::cvtColor(diff, diff1Channel, CV_BGR2GRAY);

    float threshold = 30; // pixel may differ only up to "threshold" to count as being "similar"

    cv::Mat mask = diff1Channel < threshold;

    cv::imshow("similar in both images" , mask);

    // use similar regions in new image: Use black as background
    cv::Mat similarRegions(input1.size(), input1.type(), cv::Scalar::all(0));

    // copy masked area
    input1.copyTo(similarRegions, mask);


    cv::imshow("input1", input1);
    cv::imshow("input2", input2);
    cv::imshow("similar regions", similarRegions);
    cv::imwrite("../outputData/Similar_result.png", similarRegions);
    cv::waitKey(0);

}

当我将两个图像写为同一个图像时，没有错误，但是在将它们更改为不同的图像时会显示错误

OpenCV Error: Sizes of input arguments do not match (The operation is neither 'array op array' (where arrays have the same size and the same number of channels), nor 'array op scalar', nor 'scalar op array') in arithm_op, file D:\opencv\sources\modules\core\src\arithm.cpp, line 659

Answer 1

这里input1和input2对于函数absdiff的大小应该相同

...
cv::resize(input2, input2, input1.size());
cv::Mat diff;
...