18.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:

Code path：/home/yahboom/Dofbot/4.opencv/03_Image processing and text drawing/06Text and image drawing.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()