The latest articles on DEV Community by Rob Lauer (@rlauer6). https://dev.to/rlauer6 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F984928%2F4a734d5d-7b1a-4ca1-8780-44eaba85a90b.png https://dev.to/rlauer6 en Rob Lauer Thu, 11 May 2023 12:41:03 +0000 https://dev.to/rlauer6/containerizing-a-qr-code-reader-21nc https://dev.to/rlauer6/containerizing-a-qr-code-reader-21nc <p><a href="https://res.cloudinary.com/practicaldev/image/fetch/s--Id9_RQ3w--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_800/https://dev-to-uploads.s3.amazonaws.com/uploads/articles/jikrg1v2yb8z3loanj99.png" class="article-body-image-wrapper"><img src="https://res.cloudinary.com/practicaldev/image/fetch/s--Id9_RQ3w--/c_limit%2Cf_auto%2Cfl_progressive%2Cq_auto%2Cw_800/https://dev-to-uploads.s3.amazonaws.com/uploads/articles/jikrg1v2yb8z3loanj99.png" alt="Credit: Flavio Polleti" width="200" height="200"></a></p> <p><a href="https://github.com/polettix">Flavio Poletti</a> recently blogged about using <code>Barcode::ZBar</code> for reading QR codes. In a previous life I have written applications for workflows that involved reading QR codes from documents and have also used <code>Barcode::ZBar</code> very effectively...highly recommended.</p> <p>Back then, iirc I had quite a struggle satisfying all of the dependencies required to get it actually work. I spent a little time after reading his article to see I could successfully build it once more, this time in a Docker container. The result is this project:</p> <p><a href="https://github.com/rlauer6/docker-barcode-zbar">docker-barcode-zbar</a></p> <p>It was a little difficult piecing together the required packages, but in the end it works!</p> <p>Next, I may create a webservice from the container and install it on a Fargate cluster. The service will allow you to upload <code>.png</code> files and scan them for QR codes. Stay tuned!</p> <h2> Other Links of Interest </h2> <ul> <li><a href="https://github.com/nimiq/qr-scanner">Javascript based scanner</a></li> <li><a href="https://github.com/mchehab/zbar">zbar library</a></li> <li><a href="https://github.polettix.it/ETOOBUSY/2020/01/22/zbar/">Reading QR Codes from Perl</a></li> <li><a href="https://metacpan.org/Barcode::ZBar"><code>Barcode::ZBar</code></a></li> <li><a href="https://github.com/rlauer6/perl-Authen-TOTP-WebApp">Two-Factor Authentication using QR code</a></li> </ul> perl qrcodes docker Rob Lauer Tue, 06 Dec 2022 10:09:45 +0000 https://dev.to/rlauer6/the-observer-effect-5f0p https://dev.to/rlauer6/the-observer-effect-5f0p <p>In physics there is the concept of the <a href="https://en.wikipedia.org/wiki/Observer_effect_(physics)" rel="noopener noreferrer">observer effect</a> whereby the act of observing something alters the measurement. Recently, I've had the pleasure of experiencing that firsthand.</p> <p><a href="http://blog.tbcdevelopmentgroup.com/2022-12-06-the-observer-effect.html" rel="noopener noreferrer">I blog about it on my website...</a></p> microservices learning