--- title: Fiducial Markers for Physical Storage Tracking | daily.dev description: A maker documents their journey building a physical storage tracking system using fiducial markers and cameras. After testing QR codes, MicroQR, Aztec, and... canonical: https://daily.dev/posts/fiducial-markers-for-physical-storage-tracking-4aszrh3nr twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Fiducial Markers for Physical Storage Tracking | daily.dev og:description: A maker documents their journey building a physical storage tracking system using fiducial markers and cameras. After testing QR codes, MicroQR, Aztec, and... og:url: https://daily.dev/posts/fiducial-markers-for-physical-storage-tracking-4aszrh3nr og:image: https://api.daily.dev/og/posts/4ASZrH3NR.png og:image:alt: Fiducial Markers for Physical Storage Tracking og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Fiducial Markers for Physical Storage Tracking **[apalrd's adventures](https://daily.dev/sources/apalrd)** · 7 min read · 0 upvotes · 0 comments ## Summary A maker documents their journey building a physical storage tracking system using fiducial markers and cameras. After testing QR codes, MicroQR, Aztec, and Data Matrix barcodes with OpenCV (finding Zbar the best QR decoder but insufficient at distance), they settled on AprilTags for their low-resolution, long-range readability. The resulting project, 'StorageTags', uses a centralized application server that pulls RTSP/HTTP camera feeds, processes AprilTag detections, maintains bin location state, and exposes a web UI plus REST/MQTT APIs. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### Why are AprilTags better than QR codes for camera-based tracking at a distance? AprilTags encode very little data, resulting in extremely low-resolution patterns that cameras can resolve from much greater distances than QR codes. QR codes require enough pixels to decode dense data, making them unreliable beyond a short range. AprilTags are specifically designed for machine vision, prioritizing unambiguous detection over data capacity, which makes them far more practical for room-scale tracking. _Makers comparing fiducial marker options for vision projects find real-world test results on daily.dev._ ### Which QR code decoder works best with OpenCV for detecting multiple codes in a single image? Zbar outperforms OpenCV's built-in decoder and WeChat's CNN-based decoder for multi-code detection. It is the only one that returns an array of all codes visible in a frame rather than just the single best match. The trade-off is that Zbar is harder to install — the project has been abandoned for roughly a decade and does not compile on macOS. _Developers building multi-tag detection pipelines track library comparisons like this on daily.dev._ ## Similar posts on daily.dev - [Startup helps retailers track their products in real-time](https://daily.dev/posts/startup-helps-retailers-track-their-products-in-real-time-ppff63lsl) · MIT News · 0 upvotes · 0 comments - [A $40 label maker and QR codes completely changed how I manage my home lab](https://daily.dev/posts/a-40-label-maker-and-qr-codes-completely-changed-how-i-manage-my-home-lab-8agqmkng7) · XDA Developers · 1 upvotes · 0 comments - [Building a local positioning system to track runners using Ultra-Wideband](https://daily.dev/posts/building-a-local-positioning-system-to-track-runners-using-ultra-wideband-9ma628zns) · Hacker News · 0 upvotes · 0 comments - [This new tracking label could help solve cargo theft](https://daily.dev/posts/this-new-tracking-label-could-help-solve-cargo-theft-goynufjlb) · TechCrunch · 0 upvotes · 0 comments --- Tags: [#backend](https://daily.dev/tags/backend), [#computer-vision](https://daily.dev/tags/computer-vision), [#opencv](https://daily.dev/tags/opencv) [View this post on daily.dev](https://daily.dev/posts/fiducial-markers-for-physical-storage-tracking-4aszrh3nr) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Fiducial Markers for Physical Storage Tracking","url":"https://daily.dev/posts/fiducial-markers-for-physical-storage-tracking-4aszrh3nr","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/fiducial-markers-for-physical-storage-tracking-4aszrh3nr"},"datePublished":"2026-08-11T08:56:26.497Z","dateModified":"2026-08-11T09:10:36.616Z","description":"A maker documents their journey building a physical storage tracking system using fiducial markers and cameras. 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