Apple MB673Z/A User Manual - Page 661

PNG Short for Portable Network Graphics. PNG is a bitmapped graphics file format that has been approved by the World Wide Web Consortium to replace patented GIF files. PNG files are patent and royalty free. See also format. polarizing filter A filter placed on the front of the camera lens that selectively transmits light traveling on one plane while absorbing light traveling on other planes. Polarizing filters are capable of reducing unwanted reflections on windows and shiny surfaces. Polarizing filters are also used to darken the sky. See also filters. positive Developed film where the tonal relationship of the subject or scene is the same on film as viewed by the eye; also known as a slide. See also dust and scratch removal, emulsion, negative. presets A saved group of settings, such as export, naming, print, and web export settings. Presets determine properties such as file format, file compression, filename construction, paper size, and ColorSync profile. Presets are usually defined for particular workflows and can be tailored to client specifications. See also ColorSync. preview images JPEG images generated by Aperture that represent the original master with any applied adjustments and associated metadata. Preview images are designed to be shared with other applications, such as iWeb, and used in place of the masters when they are offline. See also adjustment, JPEG, metadata, offline. primary selection The most important image in an image selection. Adjustments are applied only to the primary selection in an image selection. The primary selection is identified by a thicker white border. There can only be one primary selection in an image selection. See also adjustment, image selection, Primary setting. Primary setting A Viewer setting in Aperture that limits metadata changes to only the primary selection in a multiple-image selection. See also filmstrip, image selection, metadata, primary selection. prime lens A lens with a fixed focal length that cannot be changed. print An image printed on paper; also known as a photograph. See also dye sublimation, inkjet printer, RA-4. profile A compilation of data on a specific device's color information, including its gamut, color space, and modes of operation. A profile represents a device's colorreproduction capabilities and is essential to effective color management. See also device characterization, gamut. program exposure An exposure mode on many automatic cameras in which the camera automatically sets the aperture and shutter values for a correct exposure. See also exposure. Glossary 661