在识别圆形里出现多个大小相近的圆，我应该如何筛选出半径最大的那一个

[euq3]

我在识别仪器仪表的时候，出现了两个大小相近的圆，我想让程序可以自己识别出半径最大的那一个圆并继续进行操作，我应该怎么编写代码呢？

[kidswong999]

写for循环遍历一下：

import sensor, image, time

sensor.reset()
sensor.set_pixformat(sensor.RGB565) # grayscale is faster
sensor.set_framesize(sensor.QQVGA)
sensor.skip_frames(time = 2000)
clock = time.clock()

while(True):
    clock.tick()
    img = sensor.snapshot().lens_corr(1.8)
    max_circle = None

    for c in img.find_circles(threshold = 2000, x_margin = 10, y_margin = 10, r_margin = 10,
            r_min = 2, r_max = 100, r_step = 2):

        if max_circle is None:
            max_circle = c
        elif c.r() > max_circle.r():
            max_circle = c
            
    print(max_circle)
    if max_circle:
        img.draw_circle(max_circle.x(), max_circle.y(), max_circle.r(), color = (255, 0, 0))

    print("FPS %f" % clock.fps())