# coding: utf-8
import numpy as np
import cv2
def motion_blur(image, degree=12, angle=45):
  image = np.array(image)
  # 这里生成任意角度的运动模糊kernel的矩阵， degree越大，模糊程度越高
  M = cv2.getRotationMatrix2D((degree / 2, degree / 2), angle, 1)
  motion_blur_kernel = np.diag(np.ones(degree))
  motion_blur_kernel = cv2.warpAffine(motion_blur_kernel, M, (degree, degree))
  motion_blur_kernel = motion_blur_kernel / degree
  blurred = cv2.filter2D(image, -1, motion_blur_kernel)
  # convert to uint8
  cv2.normalize(blurred, blurred, 0, 255, cv2.NORM_MINMAX)
  blurred = np.array(blurred, dtype=np.uint8)
  return blurred
img = cv2.imread('./9.jpg')
img_ = motion_blur(img)
cv2.imshow('Source image',img)
cv2.imshow('blur image',img_)
cv2.waitKey()

# coding: utf-8
import numpy as np
import cv2
img = cv2.imread('./9.jpg')
img_ = cv2.GaussianBlur(img, ksize=(9, 9), sigmaX=0, sigmaY=0)
cv2.imshow('Source image',img)
cv2.imshow('blur image',img_)
cv2.waitKey()