C# WPF Image loading and saving

Question

I have been trying to load my image in bitmap image class. But whenever I am trying to save an image (using a third party library called Image Processor) the quality drops. So my question is that:

Is there any way i can save image in its full quality?

src.BeginInit();

src.UriSource = new Uri("picture.jpg", UriKind.Relative);

src.CacheOption = BitmapCacheOption.OnLoad;

src.EndInit();

As far as I know, jpg is a lossy format. Every save in that format will reduce the image quality. Try doing the same with PNG and see if that too is giving the same issue — Ganesh R.
– Ganesh R., Commented Dec 5, 2015 at 18:30
Or use a JpegBitmapEncoder and set its QualityLevel property to 100. — Clemens
– Clemens, Commented Dec 5, 2015 at 19:28

kyrylomyr · Accepted Answer · 2015-12-05 23:20:55Z

2

You can achieve image saving without any thirdparty libraries. But you should know, that saving JPEG always drops quality a bit - its a nature of that format, not an issue with library. Using the JpegBitmapEncoder you can configure the quality, and with the maximum value you will not see a picture degradation, but anyway it present. So, consider using of PNG format instead.

Here is a short snippet how to load and save a JPEG image:

// Load from file or any other source.
var uri = new Uri(@"D:\InputImage.jpg");
var bitmap = new BitmapImage(uri);

// Save to file.
var encoder = new JpegBitmapEncoder(); // Or any other, e.g. PngBitmapEncoder for PNG.
encoder.Frames.Add(BitmapFrame.Create(bitmap));
encoder.QualityLevel = 100; // Set quality level 1-100.

using (var stream = new FileStream(@"D:\OutputImage.jpg", FileMode.Create))
{
    encoder.Save(stream);
}

edited Dec 5, 2015 at 23:20

answered Dec 5, 2015 at 21:28

kyrylomyr

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StepUp · Accepted Answer · 2015-12-05 21:15:55Z

0

WebImage works very well and I use often this class in my application. It has a lot of nice built-in features, for example, saving proportins when resizing an image:

 WebImage wi = new WebImage(imageName);
 wi.Resize(314, 235, true);
 wi.Save(imageName, "png");

edited Dec 5, 2015 at 21:15

answered Dec 5, 2015 at 20:19

StepUp

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