Welcome to AI View Depth camera repository

18.Text and picture drawing

Text and picture drawing

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

The parameters are: picture, added text, upper left corner coordinate (integer), font, font size, color, and font thickness.

Font types are as follows:

Start Docker

After entering the Raspberry Pi 5 desktop, open a terminal and run the following command to start the container corresponding to Dofbot:


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./Docker_Ros.sh

Access Jupyter Lab within Docker:


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IP:9999 // Example: 192.168.1.11:9999

Code path:/root/Dofbot/4.opencv/3.draw_picture/06_draw_world.ipynb


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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 2 text content 3 coordinates 4 5 font size 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)


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import matplotlib.pyplot as plt

img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)

plt.imshow(img)

plt.show()

Rectangle and circle drawing

ROS introduction