import sensor, image, time
import car
from pyb import LED
from pyb import Pin
sensor.reset() # Initialize the camera sensor.
sensor.set_pixformat(sensor.RGB565) # use RGB565.
sensor.set_framesize(sensor.QQVGA) # use QQVGA for speed.
sensor.skip_frames(10) # Let new settings take affect.
sensor.set_auto_whitebal(False) # turn this off.
clock = time.clock() # Tracks FPS.
green_threshold = (31, 66, -34, -9, -2, 18)
def find_max(blobs): #寻找最大面积的球
max_size=0
for blob in blobs:
if blob[2]*blob[3] > max_size:
max_blob=blob
max_size = blob[2]*blob[3]
return max_blob
while(True):
clock.tick() # Track elapsed milliseconds between snapshots().
img = sensor.snapshot() # Take a picture and return the image.
blobs = img.find_blobs([green_threshold])
if blobs:
max_blob = find_max(blobs)
x_error = max_blob[5]-img.width()/2
for greenblord_threshold in blobs:
if greenblord_threshold.pixel() > 2000:
car.run(30-0.5*green_x_error,30+0.5*green_x_error)
elif greenblord_threshold.pixel() < 10000:
car.run(0,0)
else:
car.run(20,-20)
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za5u
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请问编译的时候为什么会出现'blob' object has no attribute 'pixel'?