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USING PHOTOSHOP ELEMENTS 8
Glossary
Last updated 7/26/2011
interlacing The display of a series of low-resolution versions of an image in a browser while the full image file is
downloaded.
J
jitter Specifies the randomness of a brush stroke.
JPEG 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.
JPEG compression A lossy compression technique that reduces image data and file size. (See also “lossy compression”
on page 297.)
K
keyword tag 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.
kumimoji See “tate-chuu-yoko” on page 302.
L
layer 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
“fill layer” on page 295 and “adjustment layer” on page 290.)
layer group 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.
layer mask A protected area in an adjustment layer. Areas below the mask cannot be edited.
Levels 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.
locked A file that is set as Read Only.
locked layer 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.
lossless compression An image-compression technique that prevents image degradation caused by data loss. Lossless
techniques usually use lower compression ratios than lossy techniques.
lossy compression An image-compression technique using compression ratios that result in the loss of some image
data.
luminance Lightness. Technically, the highest plus lowest RGB values divided by two.
LZW (Lemple-Zif-Welch) A lossless technique especially suited for compressing images that contain large areas of a
single color.
M
matting 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.
