Question

I’m resizing jpeg 1200×900 ,556kb by method:

public static Image ResizeImage(Image imgToResize, int height) //height=400
{
    int destWidth;
    int destHeight;

    int sourceWidth = imgToResize.Width;
    int sourceHeight = imgToResize.Height;

    float nPercent = 0;

    float nPercentH = 0;


    nPercentH = ((float)height / (float)sourceHeight);


    nPercent = nPercentH;


    destWidth = (int)(sourceWidth * nPercent);
    destHeight = height;

    Bitmap b = new Bitmap(destWidth, destHeight);
    Graphics g = Graphics.FromImage((Image)b);
    g.InterpolationMode = InterpolationMode.HighQualityBicubic;

    g.DrawImage(imgToResize, 0, 0, destWidth, destHeight);
    g.Dispose();
    return b;
}

SavingŁ

Image image = Image.FromStream(new FileStream(path, FileMode.Open));
Image imageAfterResizing =ResizeImage(image,400);
imageAfterResizing.Save(@"c:\myPhoto.jpg");

gives me 555kb 533×400 jpeg.

Why this photo is so heavy.

For photo jpeg 2111kb 2156×1571
I get 556kb 533×400 jpeg

Why in first case is so terrible !

http://img6.imageshack.us/img6/1127/photo1nz.jpg
http://img248.imageshack.us/img248/8063/photo2y.jpg

Answer 1

Looks like you aren’t specifying the save format, it’s likely coming out the other end as a bitmap.

Specify the format during the save: img.Save(“C:\\foo.jpg”, ImageFormat.Jpeg);