Image Unit Tutorial which provides step-by-step instructions for writing a variety of kernels and packaging them as image units.
CIDemoImageUnit is a sample image unit Xcode project which is available after you install the developer tools on your hard disk, in Developer > Examples > Quartz > Core Image.
CIAnnotation is a compositing and painting sample application that contains two custom image units. It is available from theADC Reference Library (Sample Code > Graphics & Imaging > Quartz.
Last updated: 2008-06-09