I can't pass parameter to method.

Question

Hi, i am new with C# and OOP.

I created a method (it blurs an image) . And it works well.  I will create another method. And i need blurred image as input parameter. But i don't know how to do this? (I tried something. But none of them didn't work) 

Here is my try:

private void sliderKernel_MouseUp(object sender, MouseEventArgs e)
{
 Filtreler f1 = new Filtreler(); //Filtreler is name of my class
 f1.Img = new Bitmap(pBox_SOURCE.Image);
 int kernelsize = sliderKernel.Value;
 Bitmap MeanImg = f1.meanfilter(kernelsize, f1.Img); //this method works well.now, i would like to use MeanImg
 pBox_PROCESSED.Image = MeanImg;
 f1.CorrectShade(f1.Img, MeanImg); //But i can't. All the pixel values are come as zero
 pBoxShadeCorrection.Image = MeanImg;
}

 

public Bitmap Img { get; set; } //my Properties
public Color PixelValue { get; set; }

 

public Bitmap meanfilter(int kernelsize, Bitmap InputImage)
{
    Bitmap CikisResmi = new Bitmap(GirisResmi.Width, GirisResmi.Height);
   //blurring operations
   return CikisResmi;
//I blurred the image. No problem with this method
}

 

public Bitmap CorrectShade(Bitmap InputImage,Bitmap BlurredImage)
{
    Color PixelVauleBlurred;
    int divR,x,y;
    int ImgWidth = InputImage.Width;
    int ImgHeight = InputImage.Height;
    for (x = 0; x < ImgWidth; x++)
    {
        for (y = 0; y < ImgHeight; y++)
        {
            PixelVauleBlurred = BlurredImage.GetPixel(x, y);
            PixelValue = InputImage.GetPixel(x, y);
            divR = Convert.ToInt16(1f*OkunanRenk.R / PixelVauleBlurred.R); //Error line            //Error message:System.DivideByZeroException: 'Attempted to divide by zero.'
            BlurredImage.SetPixel(x, y, Color.FromArgb(divR, divR, divR));
        }
    }
    return BlurredImage;
}