分类: Python/Ruby
2022-06-13 11:30:09
#!/usr/bin/env python
# -*- coding:utf-8 -*-
import cv2
import numpy as np
file=r"src.jpg"
# step1:读取照片
img = cv2.imread(file)
# step1.2:缩放图片()
img = cv2.resize(img, None, fx=1.0, fy=1.0)
rows, cols, channels = img.shape
# 展示图片
cv2.imshow("original...", img)
# step2.1 图片转换为灰度图并显示
hsv = cv2.cvtColor(img, cv2.COLOR_BGR2HSV)
# :图片的二值化处理
# 红底变蓝底
# 将在两个阈值内的像素值设置为白色(255),
#而不在阈值区间内的像素值设置为黑色(0)
#
lower_red= np.array([0,125,125])
upper_red = np.array([255,255,255])
mask = cv2.inRange(hsv, lower_red, upper_red)
#step2.3:腐蚀膨胀 若是腐蚀膨胀后仍有白色噪点,可以增加iterations的值
erode = cv2.erode(mask, None, iterations=5)
# cv2.imshow('erode', erode)
dilate =外汇跟单gendan5.com cv2.dilate(erode, None, iterations=7)
# step3遍历每个像素点,进行颜色的替换
#若是想要将红底变成蓝底img[i,j]=(255,0,0),
#若是想将蓝底变为红底则img[i,j]=(0,0,255),
#若是想变白底img[i,j]=(255,255,255)
for i in range(rows):
for j in range(cols):
if dilate[i,j] ==255: # 像素点255表示白色,180为灰度
img[i,j]=(0,0,255) # 此处替换颜色,为BGR通道,不是RGB通道
#step4 显示图像
new_file=r"dst.jpg"
cv2.imwrite(new_file, img)
res = cv2.imread(new_file)
cv2.imshow('result...', res)
# 窗口等待的命令,0表示无限等待
cv2.waitKey(0)