Adobe ADBCD17648MC Manuale Utente

USING PHOTOSHOP ELEMENTS 8
Glossary

Masks, which let you manipulate, isolate, and protect specific parts of an image. In Photoshop 

Elements, alpha channels are called saved selections. To save an alpha channel, choose Select  > Save Selection. To load 
an alpha channel, choose Select  > Load Selection.

The existing lighting conditions under which a photo is taken, without enhancement from a camera 

flash.

A series of images in GIF format that create the illusion of movement when they are displayed in 

sequence over time.

The smoothing of jagged edges in digital images by averaging the colors of the pixels at a boundary.

A type of file compression used to compress JPEG files.

Any unexpected and undesired change to a digital image caused by incorrect settings or faulty processing. 

Examples include blooming, moire, sharpening, and noise.

The ratio of an image’s width to its height. It is used to determine how an image fits on a page or monitor.

Related to an application (also, file association). Each file type has an associated application. For example, 

PSD files are associated with Photoshop and Photoshop Elements. You receive an alert if you try to open a file that 
lacks an associated application.

An automatic color-correction command.

The bottom-most layer in an image, usually containing the image data. The Background layer is 

always locked. If you want to change its stacking order, blending mode, or opacity, you must first convert it to a regular 
layer.

Light coming from a source behind the photographed subject.

In digital photography, the illusion that an image is slightly raised from its background surface.

The standard compression scheme for JPEG files. Baseline JPEG files display in line-by-line passes 

when viewed on the web.

Performing one or more tasks to a group of files at the same time.

A raised or depressed effect around all or part of an image or text. Bevels are created by applying highlight and 

shadow to the inside and outside edges of its border to simulate three-dimensional depth.

The number of colors used to represent a pixel in an image. A 1-bit image is black and white; an 8-bit image 

can have 256 colors or shades of gray; a 16-bit image can have 65,536 colors.

An image consisting of rows and columns of pixels in computer memory. Also called a raster image. 

Bitmap file formats include BMP, GIF, JPEG, PSD, PICT, and TIFF. (See also “

” on page  303.)

Bits per channel. This measurement determines how many tones each color channel can contain.

A theoretical material that is black when completely cold and that begins to glow in various colors as it is 

heated. As its temperature (measured in degrees Kelvin) rises, it begins glowing in colors ranging from red (coolest) 
to white (hottest). (See also “

” on page  293.)

A feature that controls how pixels in an image are affected by a painting or editing tool. The blend 

color is applied to the base (original) color to produce a new color, the result color. When applied to layers, a blending 
mode determines how the pixels in a layer blend with pixels in layers beneath it.

An artifact caused by overflow of color information from one sensor in a camera (corresponding to a pixel)