TextDrawingBoundingBox.py

import cv2
import numpy as np
import matplotlib.pyplot as plt

def ShowWithMatplotlib(img, title):
    imgRGB = img[:, :, ::-1]
    plt.imshow(imgRGB)
    plt.title(title)
    plt.show()

colors = {'blue': (255, 0, 0), 'green': (0, 255, 0), 'red': (0, 0, 255), 'yellow': (0, 255, 255),
          'magenta': (255, 0, 255), 'cyan': (255, 255, 0), 'white': (255, 255, 255), 'black': (0, 0, 0),
          'gray': (125, 125, 125), 'rand': np.random.randint(0, high=256, size=(3,)).tolist(),
          'dark_gray': (50, 50, 50), 'light_gray': (220, 220, 220)}

image = np.zeros((400, 1200, 3), dtype="uint8")
image[:] = colors['light_gray']

font = cv2.FONT_HERSHEY_SIMPLEX
fontScale = 2.5
thickness = 5
text = 'abcdefghijklmnopqrstuvwxyz'
circleRadius = 10

ret, baseline = cv2.getTextSize(text, font, fontScale, thickness)
textWidth, textHeight = ret
textX = int(round((image.shape[1] - textWidth) / 2))
textY = int(round((image.shape[0] + textHeight) / 2))

cv2.circle(image, (textX, textY), circleRadius, colors['green'], -1)
cv2.rectangle(image, (textX, textY + baseline), (textX + textWidth - thickness, textY - textHeight), colors['blue'], thickness)
cv2.circle(image, (textX, textY + baseline), circleRadius, colors['red'], -1)
cv2.circle(image, (textX + textWidth - thickness, textY - textHeight), circleRadius, colors['cyan'], -1)
cv2.line(image, (textX, textY + int(round(thickness / 2))), (textX + textWidth - thickness, textY + int(round(thickness / 2))), colors['yellow'], thickness)
cv2.putText(image, text, (textX, textY), font, fontScale, colors['magenta'], thickness)
ShowWithMatplotlib(image, 'cv2.getTextSize() + cv2.putText()')