使用Opencv代码新建一个600×600尺寸的黑色画板,在画板上绘制出中华人民共和国国旗
时间: 2024-09-25 14:08:27 浏览: 77
在OpenCV中创建一个600x600像素的黑色画布,并在其上绘制中国国旗,你可以使用Python编写以下代码。首先,需要导入必要的库`cv2`(OpenCV的Python接口),然后按照以下步骤操作:
```python
import cv2
import numpy as np
# 创建一个600x600的全黑图像
img = np.zeros((600, 600, 3), dtype=np.uint8) # 黑色背景
img[:] = (0, 0, 0) # 设置所有像素为黑色
# 定义国旗的矩形区域
flag_width = 95 # 国旗长边宽度
flag_height = 42 # 国旗短边高度
red_start_x = img.shape[1] // 2 - flag_width // 2 # 红色部分起始位置
red_end_x = red_start_x + flag_width
red_start_y = 40 # 红色部分起始位置
red_end_y = red_start_y + flag_height
# 绘制红色矩形
cv2.rectangle(img, (red_start_x, red_start_y), (red_end_x, red_end_y), (0, 0, 255), -1) # 颜色设置为BGR格式
# 绘制黄色矩形(五角星中心)
yellow_start_x = red_start_x + flag_width * 2 // 5
yellow_start_y = red_end_y // 2
yellow_end_x = yellow_start_x + flag_width * 3 // 10
yellow_end_y = red_start_y + flag_height * 7 // 10
cv2.rectangle(img, (yellow_start_x, yellow_start_y), (yellow_end_x, yellow_end_y), (0, 255, 255), -1)
# 绘制白色五角星
white_star_points = [(yellow_start_x, yellow_start_y), (yellow_end_x, yellow_start_y),
(yellow_end_x, yellow_end_y), (yellow_start_x, yellow_end_y)]
cv2.fillConvexPoly(img, np.array(white_star_points, dtype=np.int32), (255, 255, 255))
# 显示国旗
cv2.imshow("Chinese Flag", img)
cv2.waitKey(0) # 等待按键,按任意键关闭窗口
cv2.destroyAllWindows()
```
运行这段代码后,会显示一个600x600大小的黑色画布,上面有红色和黄色的矩形以及白色的五角星,模拟中华人民共和国国旗。
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