python实现图像添加正弦噪声

可以使用Python的NumPy和OpenCV库来添加正弦噪声。具体的步骤如下：

1. 导入需要的库

import cv2
import numpy as np

2. 读取图片并转换为灰度图像

img = cv2.imread('image.jpg')
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)

3. 生成正弦噪声

height, width = gray.shape
freq = 10  # 正弦波频率
amplitude = 50  # 正弦波振幅
noise = amplitude * np.sin(2 * np.pi * freq * np.arange(width) / width)

4. 将正弦噪声加入图像中

for i in range(height):
    gray[i, :] += noise.astype(np.uint8)

5. 显示加入噪声后的图像

cv2.imshow('image', gray)
cv2.waitKey(0)
cv2.destroyAllWindows()

完整代码：

import cv2
import numpy as np

img = cv2.imread('image.jpg')
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)

height, width = gray.shape
freq = 10  # 正弦波频率
amplitude = 50  # 正弦波振幅
noise = amplitude * np.sin(2 * np.pi * freq * np.arange(width) / width)

for i in range(height):
    gray[i, :] += noise.astype(np.uint8)

cv2.imshow('image', gray)
cv2.waitKey(0)
cv2.destroyAllWindows()