|
Just judging from that image, there is no doubt that less colors are being rendered on the PPC. At first it looks like the two systems just may be dithering the image in different ways, but looking closer at the larger images suggest something else.
If you look at the 16-bit PC image (the large image), you can see 2 types of banding: a moire type of banding radiating from the sun and a "sun-ray" type of banding (only noticeable on the large image). Well, the "sun-ray" banding is less noticeable on the PC because there are far more bands... meaning a larger pallette of colors are getting used. Looking at the PPC version, the "sun-ray" bands are larger and more blocky... meaning less colors. There is also no moire pattern on the PPC image except for the area right above the sun where a few large "moire bands" exist.
Even if you look at the strand, the shadows are much more gradual on the PC version.
There's no doubt in my mind that the PPC image is using less colors... I wouldn't be surprised if that truly is 12-bit color.
|