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別名: rotation angle

スキャナーに対するQRコードの回転位置です。3つのファインダーパターンのおかげで、QRコードは（0〜360度の）どの回転角度からでも、鏡像であっても読み取ることができます。デコーダーはファインダーパターンの配置から向きを判定します。

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