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使用OpenCV绘图函数绘制一幅有意境的人物图像
2023-10-13 19:48:32 深夜i     --     --
OpenCV 绘图函数 人物图像 有意境

OpenCV是一款功能强大的开源计算机视觉库,提供了丰富的图像处理和计算机视觉算法。其中,绘图函数是OpenCV库的关键部分之一,可以用于绘制各种图像,包括人物图像。下面介绍如何使用OpenCV绘图函数绘制一幅有意境的人物图像。

首先,我们需要创建一个空白的画布,用于绘制人物图像。使用OpenCV库的`cv2.cvtColor()`函数将一个全黑的图像转换为BGR色彩空间,代码如下:


import cv2

import numpy as np

canvas = np.zeros((400, 400, 3), dtype="uint8")

canvas = cv2.cvtColor(canvas, cv2.COLOR_BGR2RGB)

接下来,我们可以使用OpenCV库的绘图函数来绘制人物的不同部分。例如,我们可以使用`cv2.circle()`函数绘制人物的脸,代码如下:


center = (200, 200)

radius = 150

color = (255, 255, 255)

thickness = -1

canvas = cv2.circle(canvas, center, radius, color, thickness)

然后,我们可以使用`cv2.ellipse()`函数来绘制人物的眼睛。代码如下:


center_left_eye = (150, 150)

center_right_eye = (250, 150)

axes = (30, 50)

angle = 0

startAngle = 0

endAngle = 360

color = (0, 0, 0)

thickness = -1

canvas = cv2.ellipse(canvas, center_left_eye, axes, angle, startAngle, endAngle, color, thickness)

canvas = cv2.ellipse(canvas, center_right_eye, axes, angle, startAngle, endAngle, color, thickness)

接着,我们可以使用`cv2.line()`函数来绘制人物的嘴巴。代码如下:


start_point = (150, 250)

end_point = (250, 250)

color = (0, 0, 0)

thickness = 2

canvas = cv2.line(canvas, start_point, end_point, color, thickness)

最后,我们可以使用`cv2.putText()`函数来添加人物的描述文字。代码如下:


text = "An artistic character"

org = (50, 380)

fontFace = cv2.FONT_HERSHEY_SIMPLEX

fontScale = 1.2

color = (0, 0, 0)

thickness = 2

canvas = cv2.putText(canvas, text, org, fontFace, fontScale, color, thickness)

最终,我们完成了一幅有意境的人物图像。完整的代码如下:


import cv2

import numpy as np

canvas = np.zeros((400, 400, 3), dtype="uint8")

canvas = cv2.cvtColor(canvas, cv2.COLOR_BGR2RGB)

center = (200, 200)

radius = 150

color = (255, 255, 255)

thickness = -1

canvas = cv2.circle(canvas, center, radius, color, thickness)

center_left_eye = (150, 150)

center_right_eye = (250, 150)

axes = (30, 50)

angle = 0

startAngle = 0

endAngle = 360

color = (0, 0, 0)

thickness = -1

canvas = cv2.ellipse(canvas, center_left_eye, axes, angle, startAngle, endAngle, color, thickness)

canvas = cv2.ellipse(canvas, center_right_eye, axes, angle, startAngle, endAngle, color, thickness)

start_point = (150, 250)

end_point = (250, 250)

color = (0, 0, 0)

thickness = 2

canvas = cv2.line(canvas, start_point, end_point, color, thickness)

text = "An artistic character"

org = (50, 380)

fontFace = cv2.FONT_HERSHEY_SIMPLEX

fontScale = 1.2

color = (0, 0, 0)

thickness = 2

canvas = cv2.putText(canvas, text, org, fontFace, fontScale, color, thickness)

cv2.imshow("Artistic Character", canvas)

cv2.waitKey(0)

cv2.destroyAllWindows()

通过上述代码,我们成功绘制了一幅有意境的人物图像。使用OpenCV的绘图函数,我们可以发挥无限的想象力,创造出更加有意思和独特的图像。无论是艺术创作还是计算机视觉研究,OpenCV都是一个非常有用的工具。

  
  

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