这里是新的 python 用户。我正在使用带有 picamera 的树莓派来解码 Datamatrix 代码。我正在尝试回收我所做的旧项目的某些部分，该项目解码 QR 码并且效果很好但不支持数据矩阵(pyzbar)，但似乎有一个问题我在尝试使用时无法弄清楚pylibdmtx.

此代码按预期工作。显示视频屏幕，突出显示找到的条形码并捕获图像。

from pyzbar import pyzbar
import time
import cv2
import os
import numpy as np

def nothing(x):
    pass

print("[INFO] starting video stream...")
cap = cv2.VideoCapture(0)
cap.set(cv2.CAP_PROP_FRAME_WIDTH, 640)
cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 480)
cap.set(cv2.CAP_PROP_FPS, 22)
build = 1
count = True
i=0


time.sleep(2.0)

found = set()
found.clear()



while cv2.waitKey(1) !=27 and cap.isOpened():
    _,frame = cap.read()

    barcodes = pyzbar.decode(frame)


    for barcode in barcodes:

        (x, y, w, h) = barcode.rect
        cv2.rectangle(frame, (x, y), (x + w, y + h), (0, 0, 255), 2)


        barcodeData = barcode.data.decode("utf-8")
        barcodeType = barcode.type


        text = "{} ({})".format(barcodeData, barcodeType)
        cv2.putText(frame, text, (x, y - 10),
            cv2.FONT_HERSHEY_SIMPLEX, 0.5, (0, 0, 255), 2)


        if barcodeData not in found:
            build = build+1
            print('saving')
            cv2.imwrite(os.path.join(str(text) + 'test.jpeg'),frame)
            found.add(barcodeData)

    cv2.imshow("Barcode Scanner", frame)
    key = cv2.waitKey(1) & 0xFF


    if key == ord("q"):
        break


print("[INFO] cleaning up...")
cap.release()
cv2.destroyAllWindows()

此代码打印 [INFO] starting video stream... 并且什么都不做。没有错误。理想情况下，我还可以将这些图像转换为黑白图像，使解码更容易一些，但还没有让它工作:

from pylibdmtx import pylibdmtx
import time
import cv2
import os
import numpy as np

def nothing(x):
    pass

print("[INFO] starting video stream...")
cap = cv2.VideoCapture(0)
cap.set(cv2.CAP_PROP_FRAME_WIDTH, 640)
cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 480)
cap.set(cv2.CAP_PROP_FPS, 22)
cap = cv2.cvtcolor(cap, cv2.COLOR_BGR2GRAY)
build = 1
count = True
i=0


time.sleep(2.0)

found = set()
found.clear()



while cv2.waitKey(1) !=27 and cap.isOpened():
    _,frame = cap.read()


    barcodes = decode(frame)


    for barcode in barcodes:

        (x, y, w, h) = barcode.rect
        cv2.rectangle(frame, (x, y), (x + w, y + h), (0, 0, 255), 2)


        barcodeData = barcode.data.decode("utf-8")
        barcodeType = barcode.type


        text = "{} ({})".format(barcodeData, barcodeType)
        cv2.putText(frame, text, (x, y - 10),
            cv2.FONT_HERSHEY_SIMPLEX, 0.5, (0, 0, 255), 2)


        if barcodeData not in found:
            build = build+1
            print('saving')
            cv2.imwrite(os.path.join(str(text) + 'test.png'),frame)
            found.add(barcodeData)

    cv2.imshow("Barcode Scanner", frame)
    key = cv2.waitKey(1) & 0xFF


    if key == ord("q"):
        break


print("[INFO] cleaning up...")
cap.release()
cv2.destroyAllWindows()

最佳答案

Pyzbar 版本 0.1.9 (2022) 的文档指出“使用 zbar 库从 Python 2 和 3 读取一维条形码和二维码”。因此，Pyzbar 唯一可以处理的二维码是 QR 码，而不是 DataMatrix 码。 参见 https://pypi.org/project/pyzbar/

https://stackoverflow.com/questions/56807522/