exploration

Category: iphone

  • Calling NYC cyclists!

    I’m looking for some beta testers for my iPhone data logger application. I’m specifically soliciting bicycle riders to record their rides around New York City in support of my thesis research involving visualizing the cyclist experience. This is a proof-of-concept exploration in what a ubiquitous mobile sensor network could possibly look like, using existing technology […]

  • OCR for iPhone source

    The source code for the Tesseract OCR for iPhone project has been published. It’s really simple – more of a skeleton, proof-of-concept project than anything else. Still, though, it’s neat to have nearly point-and-shoot text conversion in your pocket. The project page is: Pocket OCR The source code is available at github: http://github.com/rcarlsen/Pocket-OCR There is […]

  • OCR on iPhone demo

    Update: Source code for demo project released. i finally got around to building a proof of concept implementation of tesseract-ocr for the iPhone. months ago, i documented the steps which helped to get the library cross-compiled for the iPhone’s ARM processor, and how to build a fat library for use with the simulator as well. […]

  • No summertime fun: BeachBall rejected

    BeachBall was recently rejected by the iPhone Developer Program on the claim that it infringes an Apple trademark image. I’m not surprised by this at all, although I was taken aback by the (relatively) quick response – 7 days. The usual Guidelines for Using Apple’s Trademarks and Copyrights was quoted: Apple Logo and Apple-owned Graphic […]

  • Summer time: BeachBall

    The BeachBall app has been submitted to the iPhone App Store. I’m pretty sure that I’ve crossed all the t’s and dotted the i’s throughout the application and am holding out hope for a smooth process. If all goes well it will be a great surprise just before the next semester kicks off. Thanks to […]

  • PinwheelBeta – adhoc

    In preparation of submitting Pinwheel to the App Store I’ve gone and released a beta version via ad hoc distribution. Seems like it should be a straightforward prospect, however the various device provisioning, code signing profiles and entitlements made it a bit of a process for a first-timer. iTunes also seems to be entirely unhelpful […]

  • cross-compiling for iPhone dev

    Update: Proof-of-concept demo. Also, updated the script for building with the 10.6 SDK. Update #2: Source code for demo project released. Update #3: script for use with tesseract v3 posted. I recently had need to use an open-source library in an iPhone project. Recalling the earlier work necessary in compiling the libraries needed for openFrameworks […]

  • openFrameworks iPhone 3GS / OS 3.0

    i’ve been dealing with a performance bug in a particle + accelerometer oF app. the same project which has run very smoothly on a first generation iPhone with OS 2.2.1 has a noticeable stutter on an iPhone 3GS with OS 3.0. there was no improvement despite several rounds of optimizing the openGL drawing code and […]

  • …little help (oh, malloc)?

    i’m having a time of it tracking down a resource allocation bloat culprit in an iPhone app i’m working on. i’ve narrowed it down to when i’m rapidly updating the center property of a UIImageView. a snippet from the Instruments application is below: there are hundreds (if not thousands) of these messages, and the object […]

  • (overly simplistic) saving state in oF for iPhone

    There was a recent comment about saving / restoring application state when using openFrameworks for iPhone which got me to thinking about how to do it. Apple’s frameworks provide a fairly thorough way to save state to the disk and restore later. There seem to be three primary ways to do this: simple plist files […]