Question

我正在尝试简单加载图像（TIFF）并显示像素值。

如果我使用ImageJ打开图像，则值为32位浮点数。但是使用opencv打开相同的图像我得到了非常奇怪的浮动值，例如4.2039e-44。

如果我使用“int”读取特定像素的值，则显示的值是正确的。下面是我用来测试的代码。这里有一个图片链接：https://goo.gl/Wmv9xE。

提前致谢。

#include <opencv2/highgui/highgui.hpp>
#include <opencv2/core/core.hpp>
#include <iostream>

int main(int argc, char **argv) {
    std::string imageFile = "image.tiff";

    cv::Mat image;
    image = cv::imread(imageFile, CV_LOAD_IMAGE_ANYDEPTH);   // Read the file

    if (!image.data)                              // Check for invalid input
    {
        std::cout << "Could not open or find the image: " << imageFile << std::endl;
        return -1;
    }
    std::cout << "Image:" << image.rows << " x " << image.cols << " Channels: " << image.channels() << " Depth: " << image.depth() << std::endl;
    std::cout << "Value at 0,0: " << image.at<float>(0,1)<< std::endl; // Strange Value
    std::cout << "Value at 0,0: " << image.at<int>(0,1)<< std::endl; // Correct Value

    return (EXIT_SUCCESS);
}

*更新*

尝试继续使用代码，我决定创建一个函数将数据转换为从文件中读取的“int”。作为一个临时解决方案，这有效，但我仍然在寻找数据加载错误的原因。

int main(int argc, char **argv) {
    std::string imageFile = "/home/slepicka/XSConfig/image.tiff";

    cv::Mat image = openImage(imageFile);

    if (!image.data)                              // Check for invalid input
    {
        std::cout << "Could not open or find the image: " << imageFile << std::endl;
        return -1;
    }

    std::cout << "Image:" << image.rows << " x " << image.cols << " Channels: " << image.channels() << " Depth: " << image.depth() << " Type: " << image.type() << std::endl;
    std::cout << "Value at 0,0: " << image.at<int>(0,1)<< std::endl; // Correct Value
    //std::cout << "Data: " << image << std::endl;
    return (EXIT_SUCCESS);
}

cv::Mat openImage(std::string filename){
    cv::Mat imageLoad = cv::imread(filename, CV_LOAD_IMAGE_ANYDEPTH);

    if(imageLoad.type() == CV_32F){
        return convertToInt(imageLoad);
    }

    return imageLoad;

}

cv::Mat convertToInt(cv::Mat source){
    int r, c;
    cv::Mat converted;

    converted.create(source.rows, source.cols, CV_32SC1);

    for (r=0; r<source.rows;r++) {
        for (c=0; c<source.cols;c++) {
            converted.at<int>(r, c) = source.at<int>(r, c);
        }
    }
    return converted;
}

问题与imread。奇怪的浮动值

0 个答案: