MAIXPY one-shot learning. Burn firmware & mbnet kmodel here https://bbs.sipeed.com/t/topic/682 and write this code.

boot.py

import sensor, image, lcd, time
import KPU as kpu
lcd.init()
sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.set_windowing((224, 224))
sensor.set_vflip(0)
sensor.set_hmirror(0)
sensor.run(1)
lcd.clear()
task = kpu.load(0x200000)
info=kpu.netinfo(task)

clock = time.clock()
count = 0

img = sensor.snapshot()
a=kpu.set_layers(task,29)
firstmap = kpu.forward(task,img)
firstdata = firstmap[:]

while(True):
    img = sensor.snapshot()
    clock.tick()
    fmap = kpu.forward(task, img)
    fps=clock.fps()
    plist=fmap[:]
    dist = 0
    for i in range(768):
       dist = dist + (plist[i]-firstdata[i])*(plist[i]-firstdata[i])
    if dist < 200:
       lcd.draw_string(224,0,"found!",lcd.GREEN,lcd.BLACK)
    else:
       lcd.draw_string(224,0,"       ")
    a = lcd.display(img, oft=(0,0))
    lcd.draw_string(0, 224, "%.2f "%(dist))
    kpu.fmap_free(fmap)
a = kpu.deinit(task)