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Drawing text picture

Function: cv2.putText(img, str, origin, font, size,color,thickness)

The parameters are: picture, need add text, upper left corner coordinates (integer), font, size of font, color, thickness of font.

Code:

import cv2 
import numpy as np
 
img = cv2.imread('yahboom.jpg',1)
font = cv2.FONT_HERSHEY_SIMPLEX
 
cv2.rectangle(img,(200,100),(500,400),(0,255,0),3)
# 1 dst 2need add text 3coordinate 4 5 size of font 6 color 7 thickness 8 line type
cv2.putText(img,'Yahboom',(250,50),font,1,(200,200,0),2,cv2.LINE_AA)
# cv2.imshow('src',img)
# cv2.waitKey(0)

import matplotlib.pyplot as plt
 
img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
plt.imshow(img)
plt.show()

After running the following program, a picture will be displayed in the jupyterLab control interface, as shown below.