python代码转java代码

[xiongdejun]

def opencv_rotate(img, angle):
    h, w = img.shape[:2]
    center = (w / 2, h / 2)
    scale = 1.0
    # 2.1获取M矩阵
     """
    M矩阵
    [
    cosA -sinA (1-cosA)*centerX+sinA*centerY
    sinA cosA  -sinA*centerX+(1-cosA)*centerY
    ]
    """
    M = cv2.getRotationMatrix2D(center, angle, scale)
    # 2.2 新的宽高，radians(angle) 把角度转为弧度 sin(弧度)
    new_H = int(w * fabs(sin(radians(angle))) + h * fabs(cos(radians(angle))))
    new_W = int(h * fabs(sin(radians(angle))) + w * fabs(cos(radians(angle))))
    # 2.3 平移
    M[0, 2] += (new_W - w) / 2
    M[1, 2] += (new_H - h) / 2
    rotate = cv2.warpAffine(img, M, (new_W, new_H), borderValue=(0, 0, 0))
    return rotate

 

 

如上转成java代码

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