How to Reduce Size of Image in windows phone

Question

I am trying to port my app in windows phone . i have to upload an image on server So it is in small Size For uploading i have done this thing in Widows Successfully but problem

Answer 1

You can try this. It worked for me. It reduced my 9.70MB file into 270KB.

WriteableBitmap cameraCapturedImage = PictureDecoder.DecodeJpeg(e.ChosenPhoto, 1024, 1024);

using (IsolatedStorageFileStream myFileStream = myStore.CreateFile(fileName))
{
  System.Windows.Media.Imaging.Extensions.SaveJpeg(cameraCapturedImage, myFileStream, cameraCapturedImage.PixelWidth, cameraCapturedImage.PixelHeight, 0, 85);
  myFileStream.Close();
}

N.B: fileName is the name of file to save size reduced image.

Answer 2

When you are taking picture you can choose the resolution with which the picture will be taken. This can be done by

PhotoCamera cam; 

After camera initizalition.

Following code when image is capturing (in the method that captures the image)

IEnumerable<Size> resList = cam.AvailableResolutions;

Size res;
if (resList.Count() > 0)
{
    res = resList.ElementAt<Size>(0);
    cam.Resolution = res;

 }

This sample chooses the first resolution

Answer 3

Try to load your original image to WriteableBitmap object, then you can use SaveJpeg() extension method from System.Windows.Media.Imaging namespace, to save new image with reduced size. For example :

.......
WriteableBitmap wb = new WriteableBitmap(bitmapImageObject);
wb.SaveJpeg(stream, 120, 160, 0, 100);
.......

Answer 4

You should use WriteablBitmap to reduce size of image. WriteablBitmap has number of methods for images in windows phone Here is more about writeablebitmapex.