opencv-python使用warpAffine转换图片

小夏有点慌

于 2023-04-13 20:31:14 发布

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文章标签： python opencv 计算机视觉

本文链接：https://blog.youkuaiyun.com/weixin_41952834/article/details/130139460

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使用opencv的warpAffine转换一下图片尺寸，应该好用

def resize_image(img, dist_size):
    image_h, image_w = img.shape[:2]

    dist_h, dist_w = dist_size

    scale = min((dist_h / image_h), (dist_w / image_w))
    ox = (-scale * img.shape[1] + dist_w) / 2
    oy = (-scale * img.shape[0] + dist_w) / 2
    M = np.array([
        [scale, 0, ox],
        [0, scale, oy]
    ], dtype=np.float32)

    dist_image = cv.warpAffine(img, M, dsize=[dist_h, dist_w], flags=cv.INTER_LINEAR,
                               borderMode=cv.BORDER_CONSTANT, borderValue=(126, 126, 126))

    IM = cv.invertAffineTransform(M)

    return dist_image, IM