Chapter4.py

'''
4- SHAPES AND TEXTS
'''
import cv2
import numpy as np

# Create a black image
img = np.zeros((512, 512, 3), np.uint8)  # Add the third dimension for color (3 channels)
print(np.shape(img))  # (512, 512, 3)

# Color the image

# img[:] = [255, 0, 0]  # Assign blue color as an array [B, G, R]



# How to get width and Height

width = img.shape[1]
height = img.shape[0]



# Create a line

cv2.line(img,(0,0),(300,300), (0,255,0), 6)  # (image, start point, end point, color, thickness)



# Draw a rectangle
cv2.rectangle(img, (0,0) , (250,350),(255,0,0),2)  # (image, start point, end point, color, thickness)
# cv2.rectangle(img, (0,0) , (250,350),(255,0,0),cv2.FILLED) # using cv2.FILLED to fill the rectangle  


# Draw a circle

cv2.circle(img,(400,50), 30, (255,255,0) , 5)  # (image, center, radius, color, thickness)

# Display the image


# Add text to the image

cv2.putText(img,'OPENCV', (400,100), cv2.FONT_HERSHEY_COMPLEX, 1, (0,155,0),1, cv2.LINE_AA)  # (image, text, start point, font, scale, color, thickness, line type



cv2.imshow('Image', img)



# you can find the image in the Resources folder
cv2.imwrite('Result/Chapter4/line.jpg', img)
cv2.waitKey(0)
cv2.destroyAllWindows()