GS1_128 initiative: air, water, and barcodes shall be free

Battle-Plan

phase1: the Barcode,
- Proof-of-Concept Notebook that we can go till there : we can generate a full GS1_128 Barcode on Jupyterlite
- workaround till 'true' GS1_128: legend and FNC1
- QRcode basic writer, via qrcode package (works on jupyterlite)
- QRcode basic camera reader, via opencv-python (but camera capture may need a trick for Jupyterlite)
- provide said Proof-of-Concept Notebooks in WinPython, with Simple Code
phase2: more simple integration
- QRcode GS1_128: writing
- Control Key checker,
- SSCC and GTIN generators
- API SSCC Generators
phase3: more versatility industry 4.0
- QrCode: reading back GS1
- Datamatrix: reading back GS1
phase4: printing simply a full label
- simple layout system... how to do it simple... chatGPT and eco-system to the rescue ?
- WebApp

hum:

a barcode solution can work even in JupyterLite: python-barcode
GS1-128 in python-barcode:
- [x] legend not to the standard, miss the '(00)' Application Identifiers highlight, to workaround
- [x] legend not as FailSafe as it could: misses the spacing on (00), for when things are to retype by handt, to workaround
- [ ] toolchain depend of a "file" step ?? documentation not clear on how to avoide this, help appreciated
- [ ] FNC1 seems pre-fixed in front of the string and sent to Code128, even if it's already pre-fixed... u'\xf1'
- [ ] propose upstream to provide patches if interested and no-one active on this
check python-barcode vs ean128 grand zebu sensei,
re-program workaround in a more "readable/universal" way: simple readable Python

Phase1 progress:

works on Jupyterlite (even with the file step...)

import micropip
await micropip.install("python-barcode")
import barcode
barcode.PROVIDED_BARCODES
from barcode.writer import ImageWriter
gs1_128 = barcode.get_barcode_class('gs1_128')
from IPython.display import SVG, display
gs1_128 = barcode.get_barcode_class('gs1_128')
my_gs1 = gs1_128('00006141411234567890', writer=ImageWriter)
fullname = my_gs1.save('gs1_barcode')
display(SVG(fullname))

a true GS1_128 legend

phase1: QRcode , using awesome stupid simple tutorial from https://www.youtube.com/watch?v=iAAKghEiUjY&t=65s

QRcode writer: use qrcode

# writing QRcode "de base"


# check jupyterlite ok
import micropip
await micropip.install("qrcode")

import qrcode
from IPython.display import Image, display
img = qrcode.make('artisou à croûte')
img.save("test.png")
display(Image(filename='test.png'))

QRcode reader: use opencv-python, but camera taking requires massage on Jupyterlite (but panel can do, so there is a way)

# reading QRcode
# import the opencv library
import cv2

# define a video capture object
vid = cv2.VideoCapture(0)

detector = cv2.QRCodeDetector()

while True:

    # Capture the video frame by frame
    ret, frame = vid.read()

    data, bbox, straight_qrcode = detector.detectAndDecode(frame)
    if len(data) > 0:
        print(data)

    # Display the resulting frame
    cv2.imshow('frame', frame)

    # the 'q' button is set as the
    # quitting button you may use any
    # desired button of your choice
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

# After the loop release the cap object
vid.release()
# Destroy all the windows
cv2.destroyAllWindows()

ipython notebook:
- https://github.com/winpython/winpython_afterdoc/blob/master/docs/barcodes_and_Qrcode.ipynb

phase2:

prefixes
Datamatrix pre-work:
- 'xf1' for Code128 is to deplace per ']d2' for Datamatrix

QRcode prework:
- 'xf1' is to replace per ']Q3' for QRcode

norm QR_standard

https://www.swisseduc.ch/informatik/theoretische_informatik/qr_codes/docs/qr_standard.pdf

QRcode augmented... what is that ?

phase 2:

checking we do correct QRcode GS1
https://barcode.tec-it.com/en/GS1DigitalLink_QRCode
australia sample

shall be (01)00799439956618(200)//https:barcodeaustralia.com

phase3:

datamatrix
- early glimpse of possible code found in stackoverflow https://stackoverflow.com/a/63971970

import numpy as np
import cv2
from pylibdmtx import pylibdmtx

if __name__ == '__main__':

    image = cv2.imread('datamatrix_sample.png', cv2.IMREAD_UNCHANGED);
    gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
    ret,thresh = cv2.threshold(gray, 0, 255, cv2.THRESH_BINARY | cv2.THRESH_OTSU)

    msg = pylibdmtx.decode(thresh)
    print(msg)

this blows my mind... can we dream to do it ?

to recheck, as it may have rusted a bit

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GS1_128 initiative: air, water, and barcodes shall be free #1234

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GS1_128 initiative: air, water, and barcodes shall be free #1234

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