From the category archives:


iOS 5 Face Detection with Core Image

by Bob McCune on March 22, 2012

One of the great new features of iOS 5 is the addition of the Core Image (CI) framework. This framework has been available for a few years on the Mac, but now its advanced image processing and filtering capabilities are available on the iOS platform as well. One particularly cool new feature available in Core […]

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A funny thing happened on the way to the ARC

by Bob McCune on February 28, 2012

As I was preparing to post the QuartzDemos project on GitHub I decided to modernize the project and covert it to use Automatic Reference Counting (ARC). Overall this was fairly easy to do despite some of the slightly confusing rules related to bridging between Objective-C objects and Core Foundation types. Everything was looking good on […]

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Drawing with Quartz on iOS

by Bob McCune on February 27, 2012

A couple of weeks ago I gave a presentation entitled “Drawing with Quartz on iOS” to the Minnesota CocoaHeads group. We had a big crowd that night and I hope you all enjoyed it. The slide deck is available on SlideShare and the QuartzDemos project is available on Github. Quartz is an essential API for […]

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