例程讲解-03-arrow_drawing绘制箭头

本例程为03-Drawing-arrow_drawing.py

# 绘制箭头
#
# 这个例子展示了如何使用OpenMV内置的画箭头功能。

import sensor, image, time, pyb

sensor.reset()
sensor.set_pixformat(sensor.RGB565) # or GRAYSCALE...
sensor.set_framesize(sensor.QVGA) # or QQVGA...
sensor.skip_frames(time = 2000)
clock = time.clock()

while(True):
    clock.tick()

    img = sensor.snapshot()

    for i in range(10):
        x0 = (pyb.rng() % (2*img.width())) - (img.width()//2)
        y0 = (pyb.rng() % (2*img.height())) - (img.height()//2)
        x1 = (pyb.rng() % (2*img.width())) - (img.width()//2)
        y1 = (pyb.rng() % (2*img.height())) - (img.height()//2)
        r = (pyb.rng() % 127) + 128
        g = (pyb.rng() % 127) + 128
        b = (pyb.rng() % 127) + 128

        # If the first argument is a scaler then this method expects  
        # to see x0, y0, x1, and y1. Otherwise, it expects a (x0,y0,x1,y1) tuple. 
        # 如果第一个参数是scaler,那么此方法应传递x0、y0、x1和y1。否则,它期望有一个(x0,y0,x1,y1)元组
        img.draw_arrow(x0, y0, x1, y1, color = (r, g, b), size = 30, thickness = 2)

    print(clock.fps())

总之,就是随心所欲的绘制箭头...

运行效果图:

星瞳科技OpenMV官方中文文档函数讲解:

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