Prepress common noun concepts

ICC......... The international color consortium was established in 1993 by software and hardware manufacturers such as Apple, Adobe, Silicon, Graphics, and Agta Kodak. It established a common format for profile profiles. .
CMS............Color management system, is based on the input device Profile, the data file is transferred to the Profile color space, and then according to the output device (monitor, printer) Profile, the color information of the data file is transferred to the device's color space To ensure the consistency of color reproduction in the workflow.
Color gamut space ... ... ... refers to the sum of a certain kind of color, such as all the colors represented by the ink is called the gamut space of the ink, and the most commonly used are Lab, CMYK, and RGB color space.
The basic color ... ... ... ... is the basic composition of a certain color, such as the basic colors of red yellow and magenta.
The opposite color ... ... ... that is, the components not included in the color, sometimes called complementary colors, such as the opposite color of magenta is green.
Hue ... ... ... the basic characteristics of the color to determine whether the color is red, yellow, blue or other color attributes.
Brightness.........Judges the property that one object can reflect more or less light than another.
Saturation......... refers to the purity of color, which reflects the principle of color and achromaticity.
System correction ... ... ... mainly refers to the correction, compensation for the color characteristics of the hardware devices and software used, so that the entire system reaches a certain technical specifications, in a good working condition.
Color correction ... ... ... usually refers to color correction, including the correction of the image tone and correct color cast.
The gradation of the print ......... refers to the density range of the image or the density difference of the image.
The hierarchy of prints.........refers to the subtle differences in the image within the density range that may be reproduced.
The definition of platemaking ............ refers to the degree of change in the area of ​​the image dots, ie, whether the edge or outline of the dot is clear and neat, and whether there is a significant difference between adjacent fine parts.
The definition of printed matter ... ... generally refers to the difference in the hue of adjacent details. Under the premise of overall picture coordination, the more obvious the hue difference of the adjacent details, the better the clarity of printed matter.
Consecutively tune the image ............ refers to the image depth and color changes are continuous, from the microscopic, there is no jumping changes in the figure, such as photographs, positive and unmounted electronic images, etc., due to technical The problem is that continuous adjustment of the image needs to be done through the screen to print and copy.
Half-tone image ... ... ... relative to continuous images, such as printed images printed on the screen, through the dot size or density to express the image hierarchy, color changes, from the microscopic, the details of this type of image is not continuous , called a halftone image.
Undertone gain...... In contrast to undercolor removal, in the dark areas of the image, increase the values ​​of the cyan, magenta, and yellow primary dots, making the darker colors more intense, or correcting the dark part to listen to the biased color to accurately Performance gray balance.
Under color removal... In the process of color separation, a part of the ink in the dark tone region of the three primary colors of magenta, magenta, and yellow in the figure is removed, that is, the halftone value of the three-color dark tone region is reduced, and a certain amount is used. The black ink is compensated to ensure that the tonality of the image is continuous and the contrast is normal.
The non-color structure ... ... is a special background color removal process, which replaces the density values ​​of all the color regions and the neutral gray regions formed by the three primary color inks in the image with black ink, and the result is that any point in the Chinese chart is the most Only use three colors of ink to express.
Dots......... A technique used to copy the intermediate levels of a continuous tone image is the smallest unit that constitutes a printed image.
Network size ............ Measured by dot coverage, refers to the proportion of dot area within a unit area.
The number of mesh lines ............ refers to the number of mesh lines or the number of mesh points contained in a unit length.
The mesh angle ............indicates the orientation of the dot, which is the angle from the baseline to the mesh line.
Rose spots............When the black, green, and magenta versions of the strong color version in the printed image are 30 degrees apart, a regular pattern will appear one after the other. The lower the net number, the more obvious, It mainly appears in the midtones of the bright tone, especially in the flat net, this pattern is called the rose spot. It is divided into two kinds of hollow rose spot solid rose spots.
The moire ............ is also called collision network, and the periodical content in the manuscript (such as the textile pattern and the dot of the printed material) will interfere with the network with fixed periodicity to form a certain pattern and reduce The resolution of the image will seriously cause waste.
The image resolution......... refers to the number of dots or pixels included in the image per unit length.
The display resolution......... represents the number of pixels that can be accommodated on the display, or the number of dots or pixels per inch on the screen.
The scanning resolution... ...... represents the dot information of the number of originals that are scanned at the time of scanning.
The output resolution is determined by the printing conditions. Usually it refers to the number of print screens, ie, the number of screens.
Imagesetter resolution ............ refers to the number of image point lasers per unit length.
The scanner's dynamic range ... ... is the ability to depict the subtle changes in color reproduction of the scanner.