20240706 数字识别抗倾斜函数

结果

识别后

代码

# -*- coding: utf-8 -*-
#=============导入库=================
import cv2
import numpy as np
#=============抗扭斜函数=================
def deskew(img):
    m = cv2.moments(img)
    if abs(m['mu02']) < 1e-2:
        return img.copy()
    skew = m['mu11']/m['mu02']
    s=img.shape[0]
    M = np.float32([[1, skew, -0.5*s*skew], [0, 1, 0]])
    affine_flags = cv2.WARP_INVERSE_MAP|cv2.INTER_LINEAR
    size=img.shape[::-1]   
    img = cv2.warpAffine(img,M,size,flags=affine_flags)
    return img
#=============主程序=================
img=cv2.imread("rotatex.png",0)
cv2.imshow("original",img)
img=deskew(img)
cv2.imshow("result",img)
cv2.imwrite("re.bmp",img)
cv2.waitKey()
cv2.destroyAllWindows()