Image quality reduces on image resize in blackberry

Question

I am using below code to resize image in blackberry but it resulting into poor quality of image. Please advise on the same.

         {
      JPEGEncodedImage encoder = null;
      encode_image = sizeImage(encode_image, (int)newWidth,(int)newHeight);
      encoder=JPEGEncodedImage.encode(encode_image.getBitmap(),100);
        }

     public EncodedImage sizeImage(EncodedImage image, int width, 
          int height) {
          EncodedImage result = null;



          int currentWidthFixed32 = Fixed32.toFP(image.getWidth());
          int currentHeightFixed32 = Fixed32.toFP(image.getHeight());

          int requiredWidthFixed32 = Fixed32.toFP(width);
          int requiredHeightFixed32 = Fixed32.toFP(height);

          int scaleXFixed32 = Fixed32.div(currentWidthFixed32,
            requiredWidthFixed32);
          int scaleYFixed32 = Fixed32.div(currentHeightFixed32,
            requiredHeightFixed32);

          result = image.scaleImage32(scaleXFixed32, scaleYFixed32);
                    return result;
         }

score 1 · Accepted Answer · answered May 20 '10 at 16:31

1

The default image scaling done by BlackBerry is quite primitive and generally doesn't look very good. If you are building for 5.0 there is a new API to do much better image scaling using filters such as bilinear or Lanczos.

answered May 20 '10 at 16:31

Marc Novakowski

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score 0 · Answer 2 · edited May 23 '17 at 10:33

0

You've probably already fixed your issue, but for other coders that need to write code that's compatible with the older API's you can also use the code from this post: Strange out of memory issue while loading an image to a Bitmap object

The thread is about android, but the image scaling math and logics are the same :)

edited May 23 '17 at 10:33

Community

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answered Jan 17 '11 at 12:40

Thomas Vervest

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Image quality reduces on image resize in blackberry

2 Answers2