Adobe 29180155 User Guide - Page 307

ADOBE PHOTOSHOP ELEMENTS 4.0 302 User Guide CMYK Cyan, magenta, yellow, and black. A color space used by most printers to render colored images. Photoshop Elements does not support CMYK color mode. color cast An unwanted or unexpected color shift in a photo. For example, a photo taken indoors without a camera flash may have too much yellow. color channels The component colors from which all colors in an image are created. Usually refers to red, green, and blue (RGB). color depth Measures how much color information is available to display or print each pixel in an image. Greater color depth means more available colors and more accurate color representation in the digital image. color gamut The range of all possible color combinations and tones in any color system, that is, the colors that a device can reproduce in any given color space. color lookup table (CLUT) A system used to index or reference colors when the bit depth is insufficient to represent all colors. color management The series of adjustments (through profiling a monitor, for instance) used to minimize the color discrepancies in an image as it travels from one device to another, for instance, from camera, to scanner, to computer, and finally to printer. Color spaces are important in color management, where the color profile of an image is reconciled against the color space of the application or device on which it is viewed. color mode Determines how the components of a color are combined, based on the number of color channels in the color model. Color modes include grayscale (1 channel), RGB (3 channels), and CMYK (4 channels), among others. Photoshop Elements supports bitmap, grayscale, indexed, and RGB color modes. color model Any system for specifying the components of color. The main color models are RGB, CMYK, and HSB. color separation The rendering of RGB color information into CMYK in preparation for printing. Photoshop Elements does not support CMYK color mode. color space An instance of a color mode designed for a particular device or purpose. For instance, the following two color spaces are instances of the RGB color model: Adobe RGB is the color space used by Adobe applications, and sRGB is the color space used by most monitors. Color spaces are important in color management, where the color profile of an image is reconciled against the color space of the application or device on which it is viewed. The color space used by Adobe applications is sometimes called the working space. ColorSync Color management software provided by Apple. color table Also called color lookup table (CLUT). A system used to index or reference colors when the bit depth is insufficient to represent all colors. color temperature (1) The position of a color along a continuum from warm (red) to cool (blue). (2) The degree of heat (in degrees Kelvin) that an object would have to absorb before it glowed in a certain color. Each color is associated with a color temperature, as are various kinds of light. color value A mathematical description of the color of a pixel determined from its color components. color wheel A representation of the colors in the visible spectrum arranged in a circle so that complementary colors are directly opposite each other. command Refers to any menu item you choose to perform a desired operation. complementary colors Two colors of light that, when combined, create white light, or two colors of ink that, when combined, create black. Complementary colors are opposing colors on a color wheel. compression A technique that reduces the file size of bitmap images. content layers Any layer in Photoshop Elements that contains an image, text, or object.