opencv imshow plt imshow

最新推荐文章于 2023-11-12 16:35:54 发布

转载最新推荐文章于 2023-11-12 16:35:54 发布 · 229 阅读

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原文链接：http://www.cnblogs.com/jianyingzhou/p/11216163.html

文章标签：

#人工智能 #python

本文介绍了使用OpenCV加载图片时的颜色模式为BGR，而Matplotlib默认显示的颜色模式为RGB，直接显示会导致颜色失真。通过代码示例展示了如何正确转换颜色空间以实现正确的图像显示。

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opencv官方文档上写的，https://docs.opencv.org/master/dc/d2e/tutorial_py_image_display.html

Color image loaded by OpenCV is in BGR mode. But Matplotlib displays in RGB mode. So color images will not be displayed correctly in Matplotlib if image is read with OpenCV. Please see the exercises for more details.

https://stackoverflow.com/questions/15072736/extracting-a-region-from-an-image-using-slicing-in-python-opencv/15074748#15074748

import cv2
import numpy as np
import matplotlib.pyplot as plt

img = cv2.imread('messi4.jpg')
b,g,r = cv2.split(img)
img2 = cv2.merge([r,g,b])
#img2 = img[:,:,::-1]
plt.subplot(121);plt.imshow(img) # expects distorted color
plt.subplot(122);plt.imshow(img2) # expect true color
plt.show()

cv2.imshow('bgr image',img) # expects true color
cv2.imshow('rgb image',img2) # expects distorted color
cv2.waitKey(0)
cv2.destroyAllWindows()

转载于:https://www.cnblogs.com/jianyingzhou/p/11216163.html