K210 MaixPy AI 功能 之 检测 红绿灯（带视频效果、模型）
本帖最后由 Sipeed-大佬鼠 于 2021-2-28 15:45 编辑话不多说，直接看效果。
https://www.bilibili.com/video/BV1yZ4y1G7dX/
```python
# object detector boot.py
# generated by maixhub.com
import sensor, image, lcd, time
import KPU as kpu
import gc, sys
def lcd_show_except(e):
import uio
err_str = uio.StringIO()
sys.print_exception(e, err_str)
err_str = err_str.getvalue()
img = image.Image(size=(224,224))
img.draw_string(0, 10, err_str, scale=1, color=(0xff,0x00,0x00))
lcd.display(img)
def main(anchors, labels = None, model_addr="/sd/m.kmodel", sensor_window=(224, 224), lcd_rotation=0, sensor_hmirror=False, sensor_vflip=False):
sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.set_windowing(sensor_window)
sensor.set_hmirror(sensor_hmirror)
sensor.set_vflip(sensor_vflip)
sensor.run(1)
lcd.init(type=1)
lcd.rotation(lcd_rotation)
lcd.clear(lcd.WHITE)
if not labels:
with open('labels.txt','r') as f:
exec(f.read())
if not labels:
print("no labels.txt")
img = image.Image(size=(320, 240))
img.draw_string(90, 110, "no labels.txt", color=(255, 0, 0), scale=2)
lcd.display(img)
return 1
try:
img = image.Image("startup.jpg")
lcd.display(img)
except Exception:
img = image.Image(size=(320, 240))
img.draw_string(90, 110, "loading model...", color=(255, 255, 255), scale=2)
lcd.display(img)
try:
task = None
task = kpu.load(model_addr)
kpu.init_yolo2(task, 0.5, 0.3, 5, anchors) # threshold:, nms_value:
while(True):
img = sensor.snapshot()
t = time.ticks_ms()
objects = kpu.run_yolo2(task, img)
t = time.ticks_ms() - t
if objects:
for obj in objects:
pos = obj.rect()
img.draw_rectangle(pos)
img.draw_string(pos, pos, "%s : %.2f" %(labels, obj.value()), scale=2, color=(255, 0, 0))
img.draw_string(0, 200, "t:%dms" %(t), scale=2, color=(255, 0, 0))
lcd.display(img)
except Exception as e:
raise e
finally:
if not task is None:
kpu.deinit(task)
if __name__ == "__main__":
try:
labels = ["green", "red"]
anchors =
# main(anchors = anchors, labels=labels, model_addr=0x300000, lcd_rotation=0)
main(anchors = anchors, labels=labels, model_addr="/sd/m.kmodel")
except Exception as e:
sys.print_exception(e)
lcd_show_except(e)
finally:
gc.collect()
```
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