读写Raw文件

将tiff文件解析并存储为raw。
读取及解析tiff：

	QString fileName = QFileDialog::getOpenFileName(this, tr("打开图片文件"), "./");
    if (fileName.endsWith(".tiff")) {
        m_img = cv::imread(fileName.toStdString(), CV_LOAD_IMAGE_UNCHANGED);
        if (m_imgData != NULL) {
            delete m_imgData;
            m_imgData = NULL;
        }
        m_rows = m_img.rows;
        m_cols = m_img.cols;
        qDebug() << "data: " << m_img.at<ushort>(0, 0);
        m_imgData = new ushort[m_rows * m_cols]();
        memset(m_imgData, 0, m_rows*m_cols * sizeof(ushort));
        for (int i = 0; i < m_img.rows; i++) {
            for (int j = 0; j < m_img.cols; j++) {
                m_imgData[i * m_img.cols + j] = m_img.at<ushort>(i, j);
            }
        }
    }
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写raw文件：

 	QString setFilter = "Raw Files(*.raw)";
    QString fileName = QFileDialog::getSaveFileName(this, tr("保存文件"), "./", setFilter);
    //qDebug() << "save filename: " << fileName;
    if (m_imgData == NULL)
        return;
    FILE *file;
    errno_t error = fopen_s(&file, fileName.toStdString().data(), "wb");
    if (error == 0) {
        fwrite(m_imgData, sizeof(ushort), m_rows * m_cols, file);
    }
    fclose(file);
    qDebug() << "on_writeBtn_clicked data: " << m_imgData[0];
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读raw文件：

	if (m_imgData == NULL)
        return;
    QString setFilter = "Raw Files(*.raw)";
    QString fileName = QFileDialog::getOpenFileName(this, tr("打开图片文件"), "./", setFilter);
    FILE* file;
    errno_t error = fopen_s(&file, fileName.toStdString().data(), "rb");
    if (error == 0) {
        fread(m_imgData, sizeof(ushort), m_rows * m_cols, file);
    }
    fclose(file);
    qDebug() << "on_readBtn_clicked data: " << m_imgData[0];
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