python opencv draw rectangle
image = cv2.imread(path)
start_point = (5, 5)
end_point = (220, 220)
# Blue color in BGR
color = (255, 0, 0)
# Line thickness of 2 px
thickness = 2
# Using cv2.rectangle() method
# Draw a rectangle with blue line borders of thickness of 2 px
image = cv2.rectangle(image, start_point, end_point, color, thickness)python opencv draw rectangle with mouse
import numpy as np
import cv2
# Making The Blank Image
image = np.zeros((512,512,3))
drawing = False
ix = 0
iy = 0
# Adding Function Attached To Mouse Callback
def draw(event,x,y,flags,params):
global ix,iy,drawing
# Left Mouse Button Down Pressed
if(event==1):
drawing = True
ix = x
iy = y
if(event==0):
if(drawing==True):
#For Drawing Line
cv2.line(image,pt1=(ix,iy),pt2=(x,y),color=(255,255,255),thickness=3)
ix = x
iy = y
# For Drawing Rectangle
# cv2.rectangle(image,pt1=(ix,iy),pt2=(x,y),color=(255,255,255),thickness=3)
if(event==4):
drawing = False
# Making Window For The Image
cv2.namedWindow("Window")
# Adding Mouse CallBack Event
cv2.setMouseCallback("Window",draw)
# Starting The Loop So Image Can Be Shown
while(True):
cv2.imshow("Window",image)
if cv2.waitKey(20) & 0xFF == ord('q'):
break
cv2.destroyAllWindows()Copyright © 2021 Codeinu
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