【opencv-python】 图像旋转、尺寸变换

顺时针旋转

def Rotate90(img):
    trans_img = cv2.transpose(img)
    new_img = cv2.flip(trans_img, 1)
    return new_img

逆时针旋转

def Rotate_90(img):
    trans_img = cv2.transpose( img )
    new_img = cv2.flip( trans_img, 0 )
    return new_img

尺寸缩放

resize_img = cv2.resize(img,(int(img.shape[1]*.5),int(img.shape[0]*.5)))
cv2.imshow('resize_img', resize_img)

综合程序代码

import cv2

# 顺时针旋转90度
def Rotate90(img):
    trans_img = cv2.transpose(img)
    new_img = cv2.flip(trans_img, 1)
    return new_img


# 逆时针旋转90度
def Rotate_90(img):
    trans_img = cv2.transpose( img )
    new_img = cv2.flip( trans_img, 0 )
    return new_img

def test(img_path):
    img = cv2.imread(img_path)
    cv2.imshow('raw', img)

    clock90_img = Rotate_90(img)
    cv2.imshow( 'Rotate90', clock90_img )

    clock_90_img = Rotate90(img)
    cv2.imshow('Rotate_90', clock_90_img)

    resize_img = cv2.resize(img,(int(img.shape[1]*.5),int(img.shape[0]*.5)))
    cv2.imshow('resize_img', resize_img)



if __name__ == '__main__':
    test('mi.jpg')

    cv2.waitKey(0)
    cv2.destroyAllWindows()

运行效果