132 Glossary

output dimensions

The actual height and width of an image when saved. You will not see the size changes to your image in the Preview area since image size affects only the final scan.

output type

The type of file that is generated during the scanning process. Output type reveals the bit depth of the image.

p

palette

A subset of the color look-up table that establishes the colors that can be displayed on the monitor at a particular time. The only color depth that allows multiple palettes is the 256 (or 8-bit) color setting for your monitor. At a color depth of 256 colors, each program (or even each individual image used or edited in a program) can have a different color palette.

palette flashing

The flashing that occurs when your monitor is set to a color depth of 256 colors and you switch programs. When you switch programs, the palette of the active program becomes the system palette, and all other programs redraw themselves as accurately as possible with the new colors.

PDF

Portable Document Format (PDF) format. Adobe Acrobat files use this format.

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PICT

Apple's proprietary image file format that is used by the Mac OS. Designed for the screen, this format is best used for color images that will not be printed. Images saved as PICT files are smaller in size than images saved as a TIFF files.

pixel

The smallest element (picture element) that can be assigned an independent color and intensity and can be displayed on a computer screen. Pixels are square dots arranged in a grid pattern to make up the images displayed on the screen.

plug-in

A module that integrates into a program to provide additional functionality. The HP Precisionscan Pro Installer adds a Photoshop plug-in (the HP Scanjet Plug-in) for image editor and OCR programs that allows you to scan text and images from within these programs.

PNG

Portable Network Graphics format. A compressed image file format suitable for the Web that might replace GIF because of copyright issues with GIF format. PNG is non-lossy compressed, supports interlacing, and can be used with the True Color output type, which GIF cannot.

pop-up menu (or list)

A menu of items that appears when you click on or pass the cursor over a command.

portrait

Orientation of a photograph or image that is taller than it is wide. An image that is wider than it is tall is called a landscape orientation.