Increase the quality of resize image

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C#

Image backImage = Image.FromFile(Imagepath);
Image resolutionBackImage = backImage.GetThumbnailImage(height ,width, null, System.IntPtr.Zero);
resolutionBackImage.Save(path);

The image was resized by using above code. But its quality is not enough. So please tell me a way to increase the image quality recieving from above code. Thanks a lot

Posted 16-Aug-11 19:18pm

Jeremy Shin Woo

Updated 16-Aug-11 20:39pm

Toniyo Jackson

v6

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Suresh Suthar · Answer 1 · 2011-08-16T19:23:00

Solution 1

Try these links from stackoverflow

http://stackoverflow.com/questions/249587/high-quality-image-scaling-c[^]

http://stackoverflow.com/questions/87753/resizing-an-image-without-losing-any-quality[^]

Posted 16-Aug-11 19:23pm

Suresh Suthar

Comments

Jeremy Shin Woo 17-Aug-11 1:45am

But I haven,t a chance to change previous code and use to external reference file.. :(

senthil sennu · Answer 2 · 2011-08-16T19:38:00

C#

private static void TransformImage(int width, int height, string path, Image image,  
            float scale) 
        { 
            Bitmap thump = new Bitmap(width, height); 
            Graphics graphics = Graphics.FromImage(thump); 
            Matrix transform = new Matrix(); 
 
            transform.Scale(scale, scale, MatrixOrder.Append); 
            graphics.SetClip(new Rectangle(0, 0, width, height)); 
            graphics.Transform = transform; 
            graphics.InterpolationMode = InterpolationMode.HighQualityBicubic; 
            graphics.DrawImage(image, 0, 0, image.Width, image.Height); 
 
            ImageCodecInfo[] Info = ImageCodecInfo.GetImageEncoders(); 
            EncoderParameters Params = new EncoderParameters(1); 
            Params.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, 100L); 
            thump.Save(path, Info[1], Params); 
            
            thump.Dispose(); 
            graphics.Dispose(); 
}