Adobe ADBCD17648MC Manuale Utente

USING PHOTOSHOP ELEMENTS 8
Glossary

The display of a series of low-resolution versions of an image in a browser while the full image file is 

downloaded.

Specifies the randomness of a brush stroke.

Joint Photographic Experts Group. A committee of experts that develops algorithms for compressing computer 

image files. Also, any graphic file to which a JPEG algorithm is applied. JPEG is the format generally used to share 
photographs over the web.

A label that you attach to photos to organize them. You create your own tags according to the people, 

places, and events that they represent. You can attach multiple tags to a photo. Once tagged, you can easily find photos 
by filtering on the keyword tag in Adobe Bridge. 

” on page  302.

A mechanism for overlaying and combining multiple images. Layers are like transparent sheets of acetate (clear 

plastic) that you can stack and rearrange. In addition to ordinary image layers, there are special kinds of layers. (See 
“

” on page  295 and “

” on page  290.)

A collection of layers saved with a Photoshop image. When you open a file with a layer group in 

Photoshop Elements, individual layers in the set are hidden in a read-only folder. To edit a layer group in Photoshop 
Elements, you must first simplify the layer. 

A protected area in an adjustment layer. Areas below the mask cannot be edited.

Functionality for adjusting color and tone. With a Levels adjustment, you can set shadow and highlight values 

to use a full tonal range, adjust middle tones only, correct color casts, and so on. 

A file that is set as Read Only. 

A layer in the Layers panel that has the lock icon applied. No changes can be made to a locked layer. A 

Background layer is always locked.

An image-compression technique that prevents image degradation caused by data loss. Lossless 

techniques usually use lower compression ratios than lossy techniques.

An image-compression technique using compression ratios that result in the loss of some image 

data. 

Lightness. Technically, the highest plus lowest RGB values divided by two.

A lossless technique especially suited for compressing images that contain large areas of a 

single color.

A method for simulating transparency in images displayed on web pages. When transparency is not 

supported, you can specify a matte color that matches the background to simulate transparency.