K210图像检测(1~8)数字卡片识别

news2024/12/23 22:25:09

前言

第一次使用该平台。想先找一个简单的识别，来走走流程。就想到了，前几年的送药小车的数字卡片识别。花了半天收集标记图片。在运行时要注意摄像头与数字卡片的高度。不过也有些不足，可能是收集某个数字的训练集的时候，拍摄高度，不一致(因为是手拍)，导致最终在同一高度下有个别数字，的识别可能低一点。

基于K210Bit开发板，MaixHub: AI 训练和分享平台和MaixPy IDE软件编译。网址： AI 训练和分享平台：https://maixhub.com/

具体参数文章介绍：https://maixhub.com/model/zoo/218

工程

百度网盘链接：https://pan.baidu.com/s/1U7Z_Q9_HnXuJH6QIgNag0g 提取码：fwvm

模型压缩包文件：1.main.py 2.model-54796.kmodel 3.report.json

三个文件夹，全丢SD卡里，在插上K210Bit，上电就能自动执行了。

代码

因为我的板子屏幕要的屏幕要转动，完成串口发送和标签重命名，因为我之前的标签命名时以数字1之类来命名，但是在实际显示时汉字显示不出来就要重命名。为此我在原有的main.py的代码下增加下述修改。

原代码main.py

# 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

input_size = (224, 224)
labels = ['数字1', '数字2', '数字3', '数字4', '数字5', '数字6', '数字7', '数字8']
anchors = [0.84, 1.22, 1.66, 2.34, 1.31, 1.75, 1.88, 2.59, 1.47, 2.09]

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)

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)

    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))
            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-54796.kmodel")
    except Exception as e:
        sys.print_exception(e)
        lcd_show_except(e)
    finally:
        gc.collect()

修改后main.py

修改行数及作用

第8行，显示标签重命名
第28行，屏幕显示旋转
第64~66行，识别数字后简单的串口打印

# 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

input_size = (224, 224)
labels = ['1', '2', '3', '4', '5', '6', '7', '8']
anchors = [0.84, 1.22, 1.66, 2.34, 1.31, 1.75, 1.88, 2.59, 1.47, 2.09]

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)

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)
    sensor.set_vflip(1)		#屏幕垂直翻转

    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:[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)
                    OutNum=labels[obj.classid()]
                    img.draw_string(pos[0], pos[1], "%s : %.2f" %(OutNum, obj.value()), scale=2, color=(255, 0, 0))
                    print(OutNum)
            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-54796.kmodel")
    except Exception as e:
        sys.print_exception(e)
        lcd_show_except(e)
    finally:
        gc.collect()