Barcodes, it's more than just bars
summary
History and facts about barcode evolution from the 1952 UPC patent and the first supermarket scan in 1974 to laser scanner hardware using galvanometric mirrors (~220 Hz). Covers standards and capacities: Code 128 for shipping (since 1981), QR codes with thousands of characters and up to ~30% error correction, and DataMatrix tolerating ~60% degradation. Demonstrations include Navilens for accessibility (blind shoppers) and a homemade color three‑channel codec called Freedy that uses LZ compression and works in demo but is not production‑grade.
AI-written summary · about
chapters (9)
- 0:00Barcode history
- 3:58Invention and tech
- 10:39UPC-A and EAN-13
- 17:43Code 128 variants
- 20:10QR Code and DataMatrix
- 26:363D/4D limits
- 33:17Freedy code demo
- 37:17Daily use impact
- 39:44Q&A
related talks
58mInternet of things Barcodes, QRs, NFC, EPC & Arduino
06mFull-Dimension Relative Positioning for RFID-Enabled Self-Checkout Services
23mFood and Liquid Sensing in Practical Environments using RFIDs
18mRetwork: Exploring Reader Network with COTS RFID Systems
33mBecoming Hyper Asset-Centric with Ultra Low-Cost Supply Chain Digitization for IoT
17mData Storage and Interaction using Magnetized Fabric
15mShopEye: fusing RFID and smartwatch for multi-relation excavation in physical stores
19mInfoLED: Augmenting LED Indicator Lights for Device Positioning and Communication