运行这个历程显示错误
AttributeError: 'Image' object has no attribute 'find_blobs'
import sensor
import image
import lcd
import time
lcd.init()
sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.run(1)
green_threshold = (0, 80, -70, -10, -0, 30)
while True:
img=sensor.snapshot()
blobs = img.find_blobs([green_threshold])
if blobs:
for b in blobs:
tmp=img.draw_rectangle(b[0:4])
tmp=img.draw_cross(b[5], b[6])
c=img.get_pixel(b[5], b[6])
lcd.display(img)