Difference between revisions of "Barcodes"
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== Testing barcodes with our apps == | == Testing barcodes with our apps == | ||
It's interesting to control that our apps are playing well with different barcodes' size. We build a [https://docs.google.com/document/d/12VtFOsnHfK4PVwBJy_aHwSogX_yKRNfzoiHCPD1sxN0/edit# test document] that you can print and use with the app. | It's interesting to control that our apps are playing well with different barcodes' size. We build a [https://docs.google.com/document/d/12VtFOsnHfK4PVwBJy_aHwSogX_yKRNfzoiHCPD1sxN0/edit# test document] that you can print and use with the app. | ||
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| + | == Barcodes data quality == | ||
| + | Sometimes we're not sure a barcode exists or not. Barcodes scanners are sometimes making mistakes. | ||
| + | |||
| + | The following site allows you to verify if a barcode exists or not: https://www.gs1.org/services/verified-by-gs1 | ||
== All things barcode == | == All things barcode == | ||
Latest revision as of 16:17, 5 September 2024
Other languages:
/ français /
Barcode length
The majority of product codes are following EAN-13 standard, and, as such, are 13 chars length.
As of 2022-04-06, Open Food Facts contains more than 12,000 products (~0.5%) with a barcode longer than 13 chars.
- The majority of barcodes with 20 numbers are products prepared, packaged and sold by Bonarea (cheese, meat, fruits, etc.); eg. https://world.openfoodfacts.org/cgi/search.pl?search_terms=Queso+de+mezcla+semicirado&search_simple=1&action=process&json=1; these barcodes are true barcodes and not a data issue, as can be seen on this picture.
- They are beginning with 00.
- Price seems to be included in the barcode: in 00162403200322003538, the price, €3.53, is included just before the last digit.
- ~7500+ products
- 20+ are beginning with 0105400141
- In poor light conditions, barcode scanners may sometimes misread barcode numbers & record it wrongly. After scanning, verify if barcode on package & what's scanned are matching.
- [to be completed]
Open Food Facts website can't display a product with a barcode longer than 24 chars (a bug is open).
Barcode weight
For EAN-13 barcodes, GS1 recommend barcodes' weight to be ~32mm. In general, producers tend to use barcodes between 24 and 35 mm. Values below 24mm and above 35 are rare.
Testing barcodes with our apps
It's interesting to control that our apps are playing well with different barcodes' size. We build a test document that you can print and use with the app.
Barcodes data quality
Sometimes we're not sure a barcode exists or not. Barcodes scanners are sometimes making mistakes.
The following site allows you to verify if a barcode exists or not: https://www.gs1.org/services/verified-by-gs1
All things barcode
- Non Standard Barcodes
- Brands to add based on barcode
- Global brands and companies taxonomy: Barcode prefixes for brands are already included
- Global countries taxonomy : Barcode prefixes for countries will be included
- Barcodes/Countries: Map from barcode initials to country or purpose
- Verification/Noteworthy Products#Products with same bar code: List of instances where two or more products have been identified as having the same barcode.
- http://world.openfoodfacts.org/code/invalid-ean
- http://world.openfoodfacts.org/codes
- http://world.openfoodfacts.org/code/9300462xxxxxx
News
- Wikidata is adding support for GS1 country prefixes
Roadmap
- Features and bugs to work on
- Adding APIs for mobile scanning apps
- Get country suggestions
- Get Manufacturer Code suggestions
- Get Product Code suggestions
- Get barcode API
- Generate barcode SVG
See also
- Barcode Wikipedia page.