eum5 发布的帖子

@kidswong999 就是在图像中识别出这个图象中的圆环，然后识别出圆环中的颜色。

import sensor, image, time
thresholds = [(30, 100, 15, 127, 15, 127),
(30, 100, -64, -8, -32, 32),
(0, 15, 0, 40, -80, -20)]
sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.skip_frames(time = 2000)
sensor.set_auto_gain(False) # must be turned off for color tracking
sensor.set_auto_whitebal(False) # must be turned off for color tracking
clock = time.clock()
while(True):
clock.tick()
img = sensor.snapshot().lens_corr(1.8)
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):
img.draw_circle(c.x(), c.y(), c.r(), color = (255, 0, 0))
for blob in img.find_blobs(thresholds, pixels_threshold=100, area_threshold=100, merge=True):
if blob.code() == 3: # r/g code
img.draw_rectangle(blob.rect())
img.draw_cross(blob.cx(), blob.cy())
img.draw_string(blob.x() + 2, blob.y() + 2, "r/g")
if blob.code() == 5: # r/b code
img.draw_rectangle(blob.rect())
img.draw_cross(blob.cx(), blob.cy())
img.draw_string(blob.x() + 2, blob.y() + 2, "r/b")
if blob.code() == 6: # g/b code
img.draw_rectangle(blob.rect())
img.draw_cross(blob.cx(), blob.cy())
img.draw_string(blob.x() + 2, blob.y() + 2, "g/b")
if blob.code() == 7: # r/g/b code
img.draw_rectangle(blob.rect())
img.draw_cross(blob.cx(), blob.cy())
img.draw_string(blob.x() + 2, blob.y() + 2, "r/g/b")
print(clock.fps())