# Changing the color of the image
img[:] = (255,255,255)

# Drawing a black line
cv2.line(img, (0,0), (500,500), (0,0,0), (10))
# Drawing a blue line
cv2.line(img, (0,500), (500,0), (255,0,0), (20))
# Drawing a red line
cv2.line(img, (0,250), (250,0), (0,0,255), (5))
# Drawing a green line
cv2.line(img, (500,250), (0,250), (0,255,0), (30))
# Drawing a yellow line
cv2.line(img, (500,250), (250,500), (0,200,200), (10))
# Drawing a violet line
cv2.line(img, (250,0), (500,250), (200,50,100), (10))
# Drawing a cyan line
cv2.line(img, (0,250), (250,500), (255,255,0), (15))
# Drawing a orange line
cv2.line(img, (250,0), (250,500), (0,100,255), (10))

cv2_imshow(img)

# Drawing a green rectangle
cv2.rectangle(img, (100,100), (300,300), (0,255,0), (20))
# Drawing a blue rectangle
cv2.rectangle(img, (200,100), (400,300), (255,0,0), (10))
# Drawing a red rectangle. Negative parameter -1
# indicates that we want to draw filled shape
cv2.rectangle(img, (100,350), (400,400), (0,0,255), (-1))
# Drawing a yellow rectangle
cv2.rectangle(img, (20,100), (80,300), (0,200,200), (5))
# Drawing a violet rectangle
cv2.rectangle(img, (420,50), (450,450), (200,50,100), (-1))

cv2_imshow(img)

# Drawing a red circle. Negative parameter -1
# indicates that we want to draw filled shape
cv2.circle(img, (250,250), 150, (0,0,255), (-1))
# Drawing a blue circle
cv2.circle(img, (70,70), 50, (255,0,0), (5))
# Drawing a green circle
cv2.circle(img, (430,430), 50, (0,255,0), (10))

cv2_imshow(img)

# Creating our image
img = np.zeros((500, 500, 3), dtype="uint8")
# Drawing a red arrow
cv2.arrowedLine(img, (100,100), (400,100), (0,0,255), (10), 8,0,0.1)
# Drawing a blue arrow
cv2.arrowedLine(img, (100,200), (400,200), (255,0,0), (20), 8,0,0.3)
# Drawing a green arrow
cv2.arrowedLine(img, (400,300), (100,300), (0,255,0), (5), 8,0,0.4)

cv2_imshow(img)

# Drawing a red ellipse. Negative parameter -1
# indicates that we want to draw a filled shape.
cv2.ellipse(img, (250,250), (90,50), 0, 0, 360, (0,0,255), (-1))
# Drawing a blue ellipse.
cv2.ellipse(img, (120,120), (100,70), 0,0,360, (255,0,0), (20))
# Drawing a green ellipse.
cv2.ellipse(img, (400,300), (30,140),0,0,360, (0,255,0), (3))
# Drawing a yellow one. If we have same values for the axes
# we can draw a circle   
cv2.ellipse(img, (80,400), (60,60), 0, 0, 360, (0,200,200), (6))
# Drawing a white ellipse with an angle of 45 degrees
cv2.ellipse(img, (250,380), (60,40), 45,0,360, (255,255,255), (10))
# Drawing a violet ellipse with an end angle of 270 degrees
cv2.ellipse(img, (300,80), (60,40),0,0,270, (200,50,100), (3))

cv2_imshow(img)

# Drawing a line
cv2.line(img, (0, 0), (500, 500), (255,0,0), 3)
# Drawing a rectangle
cv2.rectangle(img, (0, 0), (150, 150), (0,0,255), 3)
# Function cv2.clipLine clips the segment against the defined rectangle
# We defining pt1 and pt2 (segment inside rectangle) 
# and starting and ending point of our line
ret, p1, p2 = cv2.clipLine((0, 0, 150, 150), (0, 0), (500, 500))
if ret:
  cv2.line(img,p1,p2,(0,255,0),3)

# Creating a Numpy array of points
pts = np.array([[50, 250], [150, 100], [250, 250],[100,400],[200,400]], np.int32)
# Creating a yellow polygon. Parameter "False" indicates
# that our line is not closed
cv2.polylines(img, [pts], False, (0,200,200), 3)

cv2_imshow(img)

# Creating a Numpy array of points
pts = np.array([[50, 250], [150, 100], [250, 250],[100,400],[200,400]], np.int32)
# Creating a yellow polygon. Parameter "False" indicates
# that our line is not closed
cv2.polylines(img, [pts], False, (0,200,200), 3)
# Creating an array of points
pts = np.array([[350, 200], [400, 150], [450, 200],[430,250],[370,250]], np.int32)
# Creating a red pentagon
cv2.polylines(img, [pts], True, (0,0,255), 5)
# Creating an array of points
pts = np.array([[350, 80], [400, 120], [450, 80]], np.int32)
# Creating a blue triangle
cv2.polylines(img, [pts], True, (255,0,0), 8)
# Creating an array of points
pts = np.array([[200,50], [300, 50], [300, 150],[200,150]], np.int32)
# Creating a green rectangle
cv2.polylines(img, [pts], True, (0,255,0), 10)
# Creating an array of points
pts = np.array([[300, 300], [400, 300], [300, 400],[400,400]], np.int32)
# # Creating a violet polygon
cv2.polylines(img, [pts], True, (200,50,100), 3)

cv2_imshow(img)

# Choosing our font
font=cv2.FONT_ITALIC

# Writing our text
cv2.putText(img,"OpenCV with Python!", (90,250), font, 1, (255,255,255), 3, cv2.LINE_AA)

cv2_imshow(img)

import numpy as np
import cv2
from PIL import ImageFont, ImageDraw, Image

img = np.zeros((450, 450, 3), np.uint8)

# 將背景設定為大紅色
img[:] = (0, 0, 255)

# 文字
text = '招財n進寶'

# 指定 TTF 字體檔
fontPath = "./康熙字典體.ttf"

# 載入字體
font = ImageFont.truetype(fontPath, 192)

# 將 NumPy 陣列轉為 PIL 影像
imgPil = Image.fromarray(img)

# 在圖片上加入文字
draw = ImageDraw.Draw(imgPil)
draw.text((30, 30),  text, font = font, fill = (0, 0, 0))

# 將 PIL 影像轉回 NumPy 陣列
img = np.array(imgPil)

cv2.imshow('My Image', img)
cv2.waitKey(0)
cv2.destroyAllWindows()