opencv(py) opencv是BGR模式

•        Python : 3.8.11
•  opencv-python : 4.1.2.30
•  opencv-contrib-python : 4.1.2.30
•          OS : Ubuntu Kylin 20.04
•       Conda : 4.10.1
•     Pycharm : 2021.1.3

代码示例

import cv2
import numpy as np

# 全0时为黑色
image = np.zeros((256, 256, 3), np.uint8)
cv2.namedWindow("image")
print(image)
cv2.imshow("image", image)
cv2.waitKey(2000)

# 255,0,0 为蓝色
image = np.zeros((256, 256, 3), np.uint8)
image[:] = [255, 0, 0]
cv2.namedWindow("image")
print(image)
cv2.imshow("image", image)
cv2.waitKey(2000)

# 0,255,0 为绿色
image = np.zeros((256, 256, 3), np.uint8)
image[:] = [0, 255, 0]
cv2.namedWindow("image")
print(image)
cv2.imshow("image", image)
cv2.waitKey(2000)

# 0,0,255 为红色
image = np.zeros((256, 256, 3), np.uint8)
image[:] = [0, 0, 255]
cv2.namedWindow("image")
print(image)
cv2.imshow("image", image)
cv2.waitKey(2000)

cv2.destroyAllWindows()

运行结果

/home/coder/anaconda3/bin/python3.8 /home/coder/PycharmProjects/pythonProject2/main.py
[[[0 0 0]
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 ...

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[[[255   0   0]
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Process finished with exit code 0

学习推荐

• Python文档 - English
• Python文档 - 中文
• Python规范 PEP
• Python规范 google版
• opencv
• opencv 帮助手册
• Python 源码
• Python PEP
• 优麒麟
• 掘金平台
• gitee平台

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