For real-world footage, SheerVideo ranks among the most powerful lossless image compressors in existence. In fact, for native video (Y'CbCr[A]) footage, where SheerVideo's lossless video compression power averages 2.43 for 4:2:2 and 2.84 for 4:4:4, SheerVideo is the only perfect-fidelity QuickTime codec that does any compression at all. For CGI and digitized film (RGB[A]) content, SheerVideo's mean lossless image compression power of 2.20 makes it 20% more powerful than PNG (1.80) and 100% more powerful than Apple's Animation codec (1.05), and only 11% less powerful than the reigning champion, PhotoJazz. With SheerVideo's nondestructive compression power, you save an average of 60% of your storage space and transmission bandwidth. So you fit twice as much uncompressed-quality video on your disk or tape.
The next two pages present a line-up of all the perfect-fidelity software QuickTime codecs we know of, measuring their compression performance, in terms of power and space savings, on the Kodak Test Set, the gold standard for real-world lossless image compression research. The following pages give detailed tables of the peformance of the 8-bit Sheer codecs on individual test images.