使用python+opencv更改图像像素颜色

# -*- coding: UTF-8 -*-
import cv2
import numpy as np

img=cv2.imread("pic.bmp")

# 将图像转换为HSV像素空间，因为HSV空间对颜色比较敏感
hsv=cv2.cvtColor(img,cv2.COLOR_BGR2HSV)

# 分别设置HSV颜色空间中，红色、黄色、蓝色、绿色的阈值
lower_red=np.array([0,43,46])
upper_red=np.array([10,255,255])

lower_yellow=np.array([26,43,46])
upper_yellow=np.array([34,255,255])

lower_blue=np.array([100,43,46])
upper_blue=np.array([124,255,255])

lower_green=np.array([35,43,46])
upper_green=np.array([77,255,255])

# 使用inRange函数获取图像中目标颜色的索引
mask_red=cv2.inRange(hsv,lower_red,upper_red)
mask_blue=cv2.inRange(hsv,lower_blue,upper_blue)
mask_green=cv2.inRange(hsv,lower_green,upper_green)
mask_yellow=cv2.inRange(hsv,lower_yellow,upper_yellow)

img_mask=np.copy(img)

color_1=[128,9,21]
color_2=[50,14,77]
color_3=[61,154,124]
color_4=[59,170,246]

# 给目标像素赋值
img_mask[mask_red!=0]=color_1
img_mask[mask_blue!=0]=color_2
img_mask[mask_green!=0]=color_3
img_mask[mask_yellow!=0]=color_4

 

 

参考链接：

https://blog.csdn.net/coldwindha/article/details/82080176

https://www.jianshu.com/p/931508698ad7

https://blog.csdn.net/weixin_41246832/article/details/84190879