Question

我在GitHub上找到了此代码，并且希望将其与新版本OpenCV一起使用（该代码大约在8年前编写）我尝试更新它，但是我的技能真的很差（我第一次使用OpenCV）作者使用MNIST数据集进行训练

bool DigitRecognizer::train(char *trainPath, char *labelsPath)
{
    FILE *fp = fopen(trainPath, "rb");
    FILE *fp2 = fopen(labelsPath, "rb");
    if(!fp || !fp2)
        return false;
    // Read bytes in flipped order
    int magicNumber = readFlippedInteger(fp);   
    numImages = readFlippedInteger(fp);
    numRows = readFlippedInteger(fp);
    numCols = readFlippedInteger(fp);
    fseek(fp2, 0x08, SEEK_SET);
    if(numImages > MAX_NUM_IMAGES) numImages = MAX_NUM_IMAGES;
    // Go through each training data entry and figure out a 
    // center for each digit
    int size = numRows*numCols;
    CvMat *trainingVectors = cvCreateMat(numImages, size, CV_32FC1);
    CvMat *trainingClasses = cvCreateMat(numImages, 1, CV_32FC1);
    memset(trainingClasses->data.ptr, 0, sizeof(float)*numImages);
    BYTE *temp = new BYTE[size];
    BYTE tempClass=0;
    for(int i=0;i<numImages;i++)
    {
        fread((void*)temp, size, 1, fp);
        fread((void*)(&tempClass), sizeof(BYTE), 1, fp2);
        trainingClasses->data.fl[i] = tempClass;
        for(int k=0;k<size;k++)
            trainingVectors->data.fl[i*size+k] = temp[k]; ///sumofsquares;
    }
    knn->train(trainingVectors, trainingClasses);
    fclose(fp);
    fclose(fp2);
    return true;
}

如何在新的OpenCV版本中使用它？

OpenCV KNearest :: train（）需要Ptr <traindata>

0 个答案: