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How to clear the orientation issue on Camera Image


We will be taking a picture with this library and create a Bitmap and set it in an ImageView as follow

public void onPictureTaken(CameraView cameraView, byte[] data) {
     Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
     imageView.setImageBitmap(bitmap);
}


This will work fine on most of the devices however there are some exceptional devices too, where the picture orientation appears to be incorrectly rotated 90 degrees to the left when the device orientations is portrait.



Solution to overcome this issue in your application

 Trick : Check if the width > height of the image then rotate by 90 

Follow the steps:

private static int fixOrientation(Bitmap bitmap) {
        if (bitmap.getWidth() > bitmap.getHeight()) {
            return 90;
        }
        return 0;
    }


Call this method to apply the rotation if needed


public static Bitmap flipIMage(Bitmap bitmap) {
        //Moustafa: fix issue of image reflection due to front camera settings
        Matrix matrix = new Matrix();
        int rotation = fixOrientation(bitmap);
        matrix.postRotate(rotation);
        matrix.preScale(-1, 1);
        return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
    }


NOTE :  Scale by (-1,1) is because I use front camera and need to fix the reflection issue of camera.


Implement in your coding:

public void onPictureTaken(CameraView cameraView, byte[] data) {
     Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
     int oreo = fixOrientation(bitmap);

if(oreo==90){
    bitmap = flipIMage(thumbnail, oreo);
    imageView.setImageBitmap(bitmap);
}else{
    bitmap = flipIMage(thumbnail, oreo);
    imageView.setImageBitmap(bitmap);
}
     imageView.setImageBitmap(bitmap);
}

private static int fixOrientation(Bitmap bitmap) {
    if (bitmap.getWidth() > bitmap.getHeight()) {
        return 90;
    }
    return 0;
}
public static Bitmap flipIMage(Bitmap bitmap, int moreo) {
    //Moustafa: fix issue of image reflection due to front camera settings
    Matrix matrix = new Matrix();
    Bitmap bitReturn = null;
    if(moreo==90){
        int rotation = fixOrientation(bitmap);
        matrix.postRotate(rotation);
        matrix.preScale(-1, 1);
        bitReturn =  Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
    }else{
        matrix.preScale(-1, 1);
        bitReturn =  Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
    }
    return bitReturn;
}
Approach 2:
if(file!=null){ imageStoragePath = file.getAbsolutePath(); thumbnail = optimizeBitmap(BITMAP_SAMPLE_SIZE, imageStoragePath); try { ExifInterface ei = new ExifInterface(imageStoragePath); int orientation = ei.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_UNDEFINED); Bitmap rotatedBitmap = null; switch(orientation) { case ExifInterface.ORIENTATION_ROTATE_90: rotatedBitmap = rotateImage(thumbnail, 90); break; case ExifInterface.ORIENTATION_ROTATE_180: rotatedBitmap = rotateImage(thumbnail, 180); break; case ExifInterface.ORIENTATION_ROTATE_270: rotatedBitmap = rotateImage(thumbnail, 270); break; case ExifInterface.ORIENTATION_NORMAL: default: rotatedBitmap = thumbnail; } mCameraPreview.setImageBitmap(rotatedBitmap); } catch (IOException e) { e.printStackTrace(); } Bitmap screenshot = getScreenShot(screenshotlay); store(screenshot,"lifecam.png");}

__________________________________________________________________________

Happy Coding...








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