c语言实现幂率变换和直方图均衡下的灰度变换

好的，关于c语言实现幂率变换和直方图均衡下的灰度变换，您可以参考下列代码：

1. 幂率变换的灰度变换:

void powerlaw_transform(Mat& image, Mat& result)
{
    double gamma = 0.4; // 设置幂值
    double C = 1; // 设置常数
    double temp_value = 0;

    result.create(image.size(), image.type());
    for (int i = 0; i < image.rows; i++)
    {
        for (int j = 0; j < image.cols; j++)
        {
            temp_value = pow((image.at<uchar>(i, j) / 255.0), gamma) * 255 * C;
            if (temp_value > 255)
                temp_value = 255;
            result.at<uchar>(i, j) = (uchar)temp_value;
        }
    }
    return;
}

2. 直方图均衡的灰度变换:

void histogram_equalization(Mat& image, Mat& result)
{
    int hist_size = 256;
    float range[] = {0, 256};
    const float* hist_range = {range};

    Mat gray_image;
    cvtColor(image, gray_image, COLOR_BGR2GRAY);

    result.create(image.size(), image.type());

    Mat hist;
    calcHist(&gray_image, 1, 0, Mat(), hist, 1, &hist_size, &hist_range);

    for (int i = 1; i < hist_size; i++)
    {
        hist.at<float>(i) += hist.at<float>(i - 1);
    }

    for (int i = 0; i < gray_image.rows; i++)
    {
        for (int j = 0; j < gray_image.cols; j++)
        {
            result.at<uchar>(i, j) = 255 * (hist.at<float>(gray_image.at<uchar>(i, j)) / (gray_image.rows * gray_image.cols));
        }
    }

    return;
}

希望能够对您有所帮助。