在EmguCV中更改图像的亮度/对比度

using Emgu.CV;
using Emgu.CV.CvEnum;
using Emgu.CV.Structure;

public static Image<Bgr, byte> ChangeBrightness(Image<Bgr, byte> image, double brightness)
{
    double alpha = brightness / 100.0;
    double beta = 0;

    Image<Bgr, byte> result = new Image<Bgr, byte>(image.Width, image.Height);
    CvInvoke.AddWeighted(image, alpha, image, 0, beta, result);

    return result;
}

using Emgu.CV;
using Emgu.CV.CvEnum;
using Emgu.CV.Structure;

public static Image<Bgr, byte> ChangeContrast(Image<Bgr, byte> image, double contrast)
{
    double alpha = (contrast + 100.0) / 100.0;
    int beta = 127;

    Image<Bgr, byte> result = new Image<Bgr, byte>(image.Width, image.Height);
    CvInvoke.ConvertScaleAbs(image, result, alpha, beta);

    return result;
}

Image<Bgr, byte> image = new Image<Bgr, byte>("path/to/image.jpg");

int brightness = 50;
double contrast = 150;

Image<Bgr, byte> result = ChangeBrightness(image, brightness);
result = ChangeContrast(result, contrast);

result.Save("path/to/output.jpg");