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POPicture distorted with Camera and getOptimalPreviewSize
 

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  1. POPicture distorted with Camera and getOptimalPreviewSize
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    <p>I am on a Camera App which taking basic pictures. I have an issue when I get the best optimal preview size.</p> <p>In fact, with this first code :</p> <pre><code>public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { if (isPreviewRunning) { mCamera.stopPreview(); } Camera.Parameters parameters = mCamera.getParameters(); mCamera.setParameters(parameters); mCamera.startPreview(); isPreviewRunning = true; } </code></pre> <p>The picture has a good quality :</p> <p><a href="http://img689.imageshack.us/i/04042011172937.jpg/" rel="nofollow noreferrer">http://img689.imageshack.us/i/04042011172937.jpg/</a></p> <p>But, with this code :</p> <pre><code>private Size getOptimalPreviewSize(List&lt;Size&gt; sizes, int w, int h) { final double ASPECT_TOLERANCE = 0.05; double targetRatio = (double) w / h; if (sizes == null) return null; Size optimalSize = null; double minDiff = Double.MAX_VALUE; int targetHeight = h; // Try to find an size match aspect ratio and size for (Size size : sizes) { double ratio = (double) size.width / size.height; if (Math.abs(ratio - targetRatio) &gt; ASPECT_TOLERANCE) continue; if (Math.abs(size.height - targetHeight) &lt; minDiff) { optimalSize = size; minDiff = Math.abs(size.height - targetHeight); } } // Cannot find the one match the aspect ratio, ignore the requirement if (optimalSize == null) { minDiff = Double.MAX_VALUE; for (Size size : sizes) { if (Math.abs(size.height - targetHeight) &lt; minDiff) { optimalSize = size; minDiff = Math.abs(size.height - targetHeight); } } } return optimalSize; } public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { // Now that the size is known, set up the camera parameters and begin // the preview. if (isPreviewRunning) { mCamera.stopPreview(); } Camera.Parameters parameters = mCamera.getParameters(); List&lt;Size&gt; sizes = parameters.getSupportedPreviewSizes(); Size optimalSize = getOptimalPreviewSize(sizes, w, h); parameters.setPreviewSize(optimalSize.width, optimalSize.height); mCamera.setParameters(parameters); mCamera.startPreview(); isPreviewRunning =true; } </code></pre> <p>The picture is totally distorted :</p> <p><a href="http://img97.imageshack.us/i/04042011173220.jpg/" rel="nofollow noreferrer">http://img97.imageshack.us/i/04042011173220.jpg/</a></p> <p>How can I resolve this problem??</p> <p>I am using a HTC Desire HD.</p> <p>It is probably my saving method too ? :</p> <pre><code>PictureCallback mPictureCallbackJpeg = new PictureCallback() { public void onPictureTaken(byte[] imageData, Camera camera) { .... BitmapFactory.Options options=new BitmapFactory.Options(); options.inSampleSize = 5; Bitmap myImage = BitmapFactory.decodeByteArray(imageData, 0,imageData.length,options); FileOutputStream fOut = new FileOutputStream(path + "/"+fl); BufferedOutputStream bos = new BufferedOutputStream(fOut); myImage.compress(CompressFormat.JPEG, 100, bos); bos.flush(); bos.close(); .... } </code></pre> <p>Thanks</p>
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    1. COHave you solved this problem?
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      1. USMartynas Jurkus
    2. COIt's an old project but it seems that Seantron's code works. Try it ;)
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