这段代码如何改动才能打印出检测结果或通过串口发送结果

Question

# generated by maixhub, tested on maixpy3 v0.4.8
# copy files to TF card and plug into board and power on
import sensor, image, lcd, time
import KPU as kpu
import gc, sys
from fpioa_manager import fm
from machine import UART

input_size = (224, 224)
labels = ['3', '4', '5', '6', '7', '8', '1', '2']
anchors = [1.88, 2.38, 1.5, 1.84, 1.37, 2.19, 1.69, 1.94, 1.66, 2.16]

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=input_size)
    img.draw_string(0, 10, err_str, scale=1, color=(0xff,0x00,0x00))
    lcd.display(img)

class Comm:
    def __init__(self, uart):
        self.uart = uart

    def send_detect_result(self, objects, labels):
        msg = ""
        for obj in objects:
            pos = obj.rect()
            p = obj.value()
            idx = obj.classid()
            label = labels[idx]
            msg += "{}:{}:{}:{}:{}:{:.2f}:{}, ".format(pos[0], pos[1], pos[2], pos[3], idx, p, label)
        if msg:
            msg = msg[:-2] + "\n"
        self.uart.write(msg.encode())

def init_uart():
    fm.register(10, fm.fpioa.UART1_TX, force=True)
    fm.register(11, fm.fpioa.UART1_RX, force=True)

    uart = UART(UART.UART1, 115200, 8, 0, 0, timeout=1000, read_buf_len=256)
    return uart

def main(anchors, labels = None, model_addr="/sd/m.kmodel", sensor_window=input_size, 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)

    uart = init_uart()
    comm = Comm(uart)

    try:
        task = None
        task = kpu.load(model_addr)
        kpu.init_yolo2(task, 0.5, 0.3, 5, anchors) # threshold:[0,1], nms_value: [0, 1]
        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[0], pos[1], "%s : %.2f" %(labels[obj.classid()], obj.value()), scale=2, color=(255, 0, 0))
                comm.send_detect_result(objects, labels)
            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:
        # main(anchors = anchors, labels=labels, model_addr=0x300000, lcd_rotation=0)
        main(anchors = anchors, labels=labels, model_addr="/sd/model-108526.kmodel")
    except Exception as e:
        sys.print_exception(e)
        lcd_show_except(e)
    finally:
        gc.collect()

Answer 1

让阿豪来帮你解答，本回答参考chatgpt3.5编写提供，如果还有疑问可以评论或留言

请问这段代码的功能是什么？能否简单介绍一下实现方式？ 这段代码实现了在Maixpy3上运行YOLOv2模型的功能，用于目标检测。具体来说，它通过从文件系统中加载模型，在传感器输入的图像上运行模型以检测目标，将检测结果通过UART串行通信接口发送给外部设备。 实现方式主要分为以下几个部分： 1.导入必要的包和模块，包括Maixpy3中与图像、LCD、KPU、内存分配等相关的模块，以及多线程通信的UART模块。 2.定义输入图像的大小、目标标签和边界框的偏移锚点参数，以及在出现异常时进行LCD显示的辅助函数。 3.初始化UART通信接口，并定义将检测结果发送给外部设备的函数。 4.初始化图像输入传感器等硬件设备，并载入YOLOv2模型。 5.在一个循环中，将从传感器输入的图像进行预测，并检测其中的目标。如果检测到目标，则画出并显示其在图像中的位置和标签，并通过UART发送检测结果给外部设备。