【8】Python計算圖像行中心灰度變化折線圖

【1】源碼

# -*- coding: utf-8 -*-
import numpy as np
import cv2
import matplotlib.pyplot as plt

inputImg=cv2.imread("01.bmp")
cv2.imshow('inputImg',inputImg)
grayImg=cv2.cvtColor(inputImg,cv2.COLOR_BGR2GRAY)
height,width=grayImg.shape
gravity=[]
for i in range(height):
    for j in range(width):
        if(i==height/2):
            gravity.append(grayImg[i,j])

y1=gravity
x1=range(width)
plt.plot(x1,y1,label='Center line',linewidth=1,color='r',marker='o',
markerfacecolor='blue',markersize=5)
plt.xlabel('Clows Number')
plt.ylabel('Gravity value')
plt.title('Gravity Mean Value Graph')
plt.legend()
plt.show()
cv2.waitkey(0)

【2】結果