Adobe 29180155 User Guide - Page 312

ADOBE PHOTOSHOP ELEMENTS 4.0 307 User Guide locked A file that is set as Read Only. In the Photo Browser, locked files display with a lock icon. locked layer A layer in the Layers palette that has the lock icon applied. No changes can be made to a locked layer. A Background layer is always locked. lossless technique An image-compression method that prevents image degradation caused by data loss when the image is decompressed. Lossless techniques usually use lower compression ratios than lossy techniques. lossy technique An image-compression method using compression ratios that result in 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. mezzotint An effect that simulates the pattern of light and shade seen in engravings made from a roughened plate. Microsoft Palette file A color table attached to an image file. midtone An area that falls between the brightest highlight and the darkest shadow. moire A wavy striped pattern in an image, resembling the pattern of watered silk. Moire can be an artifact caused by a camera's inability to capture the detail in an image. mojikumi A system for determining spacing between punctuation, symbols, and numbers in Japanese type. monitor resolution The resolution of a monitor, described in pixel dimensions. The size of an image displayed on-screen depends on the pixel dimensions of the image, the size of the monitor, and the monitor resolution. See also printer resolution and resolution. multiple master Customizable Type 1 fonts with typeface characteristics that have variable features such as weight, width, style, and optical size. N noise An artifact caused by interference or camera error. Noise is often seen as stray pixels of unexpected color or a generally "grainy" appearance. Certain compression techniques can amplify noise. noise gradient A gradient that contains randomly distributed colors within a range of specified colors. non-fringe pixels Pixels that are more than 50 percent selected in an anti-aliased selection. note annotations A note added to a Photoshop file. In Photoshop Elements you can view and delete note annotations, but you can't add them. O online service Any service to which you can connect to and order from over the Internet. You can access online services from Adobe Bridge to order prints, photo books, cards, and such. In addition, you can share your photos online through online sharing services. opacity The extent to which something blocks light. You can change the opacity of layers, filters, and effects so that more (or less) of the underlying image shows through. opaque The opposite of transparent. When text, shapes, or layers are opaque you cannot see through them.