Compatibility among printers

All the printers supported by PSF support IM image data objects. However, an IM image might or might not print at the same size on a printer with a different resolution; it depends on whether the printer supports IOCA, as follows:

• If the printer does not support IOCA, IM images created with one resolution shrink or expand.
• If the printer does support IOCA, PSF transforms the IM image data object into an IOCA image, taking advantage of the resolution independence available with IOCA image data objects. Thus, the IM image prints at the correct size. Because of differences in the scaling algorithms used by various printers, however, exact fidelity of the image is not guaranteed.