Rotate image

[ajaybarvey]

Hello, The example is working fine. How do I rotate the image? What is the api to use for rotation?

[sunil-singh-chaudhary]

yes same is my question Pls tell how to rotate image

[waqasawan44]

imageView.setRotation(imageView.getRotation() + 90);

[waqasawan44]

public static Bitmap RotateBitmap(Bitmap source, float angle) { Matrix matrix = new Matrix(); matrix.postRotate(angle); return Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true); }

[sunil-singh-chaudhary]

tnx but i want to rotate it using Opencv

[waqasawan44]

no idea

[shivanraptor]

The image captured from the Camera Activity is rotate 90 degrees. My app is in portrait but I have to take picture in landscape mode. It will be great if the image is rotated to correct orientation based on sensor orientation.

[mario002e]

+1

[abhigarg]

use flip(cv::Mat, rotate_flag) in opencv to rotate the image by 90 or 270 degs or make a mirror image of original. Check this for documentation

[klaszlo8207]

Just update the ScanFragment activity:

private Bitmap getBitmap() {
    Uri uri = getUri();
    try {
        Bitmap bitmap = Utils.getBitmap(getActivity(), uri);

        Matrix m = new Matrix();
        m.postRotate(90);
        bitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), m, true);

        getActivity().getContentResolver().delete(uri, null, null);
        return bitmap;
    } catch (IOException e) {
        e.printStackTrace();
    }
    return null;
}