Mega pixzal
Pixel density. The greater the density, the higher the quality of the image.
in the number of pixels
DPI stands for Dots Per Inch, and is used to set the quality of printing, or to compare the quality of different printers.
Hewlett Packard color laser printers are some of the best for making magazine quality printouts from home. However, the quality of the image being printed and the paper used are just as important to achieve the magazine quality.
Xerox printers are definitely worth their price because they are cheap printers with many great features. Xerox printers allows one to print professional digital color printing image quality.
Dot-matrix printers.
The image quality is definitely good enough for framing. The key is to get good quality ink, high quality photo paper, and to print them out in high quality printing mode (not fast or draft or anything similar). If the photo is of good quality and you follow the tips for high quality printing you should be happy.
measures the perceived image degradation (typically, compared to an ideal or perfect image). Imaging systems may introduce some amounts of distortion or artifacts in the signal, so the quality assessment is an important problem.
Inkjet printers tend to be less expensive than laser printers even though the printing quality is not as high. Ink jet printers are becoming close in quality, however.
HP deskjet printers have the best quality. The images come out in clearly defined color and the printers are of the best quality, rarely breaking. Buying from HP is also more cost effective.
Canon produces very high quality laser printers. These printers are known for their durability and the high quality of the printed material.