Question

我遇到以下问题，我在尝试打印变量时会遇到访问冲突异常，但只有在循环运行了特定次数后才会出现。

特别是在第211次迭代中，行：

cout << "Frame " << i << ", Recall: " << recall << ", Precision: " << precision << ", IoU: " << iou << endl;

给出错误：

 0xC0000005: Access violation reading location 0x3F09C003.

奇怪的是，这只会在我打印变量时出现，而且总是在第211次迭代时发生。如果我完全删除print语句，或者甚至只是打印一个字符串，它工作正常。但是如果我打印任何变量（i，召回，精度等），它会抛出此异常。如果我完全从循环中删除打印，并且在循环外部只有一个打印语句，它也会抛出相同的异常。有什么建议吗？

以下代码：

template <typename T>
template <typename T2>
void Rect<T>::GetPerformance(const Rect<T2>& actual, 
              float &iou, float &precision, float &recall) const {
    float numDetections = Area();
    float numActual = actual.Area();
    iou = Overlap(actual);
    float numCorrect = iou *(actual.Area() + Area()) / (1 + iou);

    precision = numCorrect / numDetections;
    recall = numCorrect / numActual;
}

...
In Main
...
Mat frame;
Mat newFrame;
int i = 0;

float recall;
float precision;
float iou;

float avgRecall = 0;
float avgPrecision = 0;
float avgIoU = 0;

while (1)
{
    iFrame = cvQueryFrame(capture); 
    if (!iFrame) break;
    frame = iFrame;

    FloatRect bb = carTracker.Track(frame);

    bb.GetPerformance(gts[i], iou, precision, recall);
    avgRecall += recall;
    avgPrecision += precision;
    avgIoU += iou;
    cout << "Frame " << i << ", Recall: " << recall << ", Precision: " << precision << ", IoU: " << iou << endl;

    i++;
}

访问违反打印变量

0 个答案: