Electronic color separation machine imposition system

With the rapid development of computer technology and laser technology, the entire world is undergoing a "color revolution." The printing field has gradually become a color world and has achieved revolutionary changes, especially the practicality of microcomputer image processing functions and speeds. Sex has been able to meet the printing process requirements, and people are constantly pursuing a picture with a personality and creativity. The traditional make-up process is difficult to meet its requirements. This creates an image imposition system that is better than artificial imposition. The image imposition system of the electronic color separation machine mainly includes a color separation control system, a full-page imposition system of a simple imposition system, and the like.

First, the application of color separation control system

The color separation control system in the electronic color separation machine imposition system refers to a software system that can use a microcomputer as a unit to complete the various color separation parameter settings, editing, and color separation machine control parameter adjustment in the electronic color separation machine. It consists of a control data unit, an identification generation unit, a color separation database unit, a continuous scanning unit, a job inspection unit, a scanned image display unit, and the like.

The control data unit mainly stores commonly used test programs and system programs. Such as laser optical position and optical value, dot system, film linearization, level curve and gray balance, system maintenance procedures.

The identification generation unit mainly generates various identifications and symbols in the color separation sheet and production management data. Such as sets of compliance lines, work content, color separation time, color machine models, repair instructions and so on.

The color separation database unit is to store various color separation parameters and work data for different pictures for continuous scanning unit and imposition system. The storage data has all operating parameters of the electronic color separation machine. Image color separation correction parameters, magnification, recording method and location. The unit also has file management functions for each work file in the separation database.

The continuous scanning unit means that all the many originals are adjusted and stored in order in the color separation database unit, and one exposure is output. It not only can effectively improve the production efficiency and rationally configure the equipment unit, but also can maximize the material savings and reduce the production cost.

The job inspection unit means that in this unit, the operator can check the correctness of the scan data setting before starting the formal scan, and can also perform color separation correction and editing on the picture directly, thereby improving the color separation machine. The efficiency of work can control the quality of scanned images.

The scanning image display unit is a color pre-proofing system which enables the operator to confirm whether the scanned image meets the process requirements and whether the cutting is correct before the formal scanning. The scanning operation status of the electronic color separation machine can also be monitored at any time for implementation. Manual intervention. In addition, it can also cultivate and improve the quality of operators, improve work efficiency and produce product quality.

Second, simple imposition system

The simple typesetting system refers to the method of forming a data file by using a computer to separate the image's color separation correction parameters, position distribution, etc., and then using a program to create a formal layout layout, a multi-map spelling platform, and a background color pattern to complete the formal plate making at a time. Simple imposition can only be limited to the image of a certain number of regular graphics fill, the background color patterns and pattern fill a small number of image graphics can not be rotated, can not set the text, can not be hollow and special treatment of the pattern and graphics, can only Used in layouts that are very simple. The simple imposition unit can solve the problem that the images generated in the imposition press chart are not fit, the background shading is inaccurate in the image border, etc. It can improve the image quality in conjunction with the manual imposition. Can improve production efficiency.

Third, the entire page imposition system

The full-page imposition system, also known as the "full-electronic platemaking system," is based on an electronic computer. It uses the color separation machine as an input and output device, electronic control system and high-end networking, and keyboard (cursor) input commands. The "man-machine dialogue" means such as color display devices fulfill all the requirements of the platemaking process (color separation, correction, imposition, and recording). It has gradually made plate-making on the road of full-scale electronicization and automation. Its use has not only greatly improved the efficiency of color separation and platemaking, but also enabled the completion of the full-page imposition of the traditional platemaking process, and brought a profound reform to the platemaking industry.

1. The composition of the system

The modern full page imposition system is a combined structure device system consisting of three parts: image input, image processing, and image output. Can complete the text and graphics input, image color separation, arbitrary color correction; graphics, text and image geometry transformation and perspective transformation, electronic image imposition and other work. The basic structure is shown in Figure 3.95.

(1) Image input

The image input section is composed of a scanning color separation unit, a color separation data terminal, and a storage unit, wherein the scanning color separation unit is a scanning unit of the electronic color separation machine, but one or more units may be configured to implement the pair of originals in the scanning unit. The point-by-point scanning, color separation and correction of the images and graphics are converted into digital information, and the images, graphics and text information are stored in the hard disk of the storage unit under control of the separation data terminal. The scanned input graphics, image text can be displayed on the image display.

The color separation data terminal consists of a network with a dual soft driver, a standard keyboard, a high resolution color display, or a combination of a digital computer and a graphic scanner, equipped with a printer and a laser printer.

Separation data terminals can accomplish three aspects of work. One is to control the work and coordination of the entire system. The second is to determine the scanning color separation parameters such as black and white field calibration, HL, M, SH adjustment, USM, and color correction. The third is the input of text and graphics, ie, the scanner is used to input graphics, and the word processing software is used to input text information.

The color separation data terminal controls the scanning and laser recording device of the color separation machine, the control scan/exposure mode, and all the operating states by the system computer. Through high-resolution display display various parameters and images, graphics, text, the operator according to the requirements of modification and program monitoring, and the various images, graphics, text editing, the formation of a single file, in order to call and query.

The storage unit consists of more than three Winchester disks (340Mb) and a tape drive for storing images, graphics and text information. The disk reads and writes data at a high speed in a closed disk drive. The image information is recorded in 8-bit words and is divided into four groups: Y, M, C, and BK. The tape drive is used to save some special image files or to output images created by other computers into a full-page imposition system.

The input system has two working methods as shown in Figure 3.95: The first is the scanning color separation machine without the control of the color separation data terminal and the central processing system, and the recording unit scans the image directly on the film, which is equivalent to the common electronic Color separation machine. The second is the input scanning of the full-page imposition system, which is controlled by the color separation data terminal and the system central processing system. The image information of the original is digitally stored in the memory, and is not directly recorded on the film. The image data in the memory is unloaded at any time by the image processing system, and is output after forming a full version.

(2) Image processing section

The image processing part of the full-page imposition system is shown in Figure 3.97. It is the core of the entire system, and a powerful computer (central processing unit) completes the various transformations of the image.

(a) Central Processing Unit

The central processor is the heart and brain of the full-page imposition system. It is the central processing unit for the image, graphics and text management systems. It undertakes the image processing and multi-task operations of the imposition system and is responsible for the management of the transmission of information to each part. When the operator completes the image correction and page imposition according to the layout design, the central processor may be instructed to record the final layout on the memory disk or tape.

(b) Storage Equipment

The storage device of the image processing section is composed of a plurality of hard disks, optical disks, and tape drives of 340 Mb or more. Hard magnetic disks and optical disks are used to store the image data corrected by the central processor and the entire page after completion of the entire page imposition. Image data and instructions. Tape drives are used to store long-term preservation of layout image data or to transfer data from other processing devices to a full-page imposition system.

(c) Control Unit

The control unit consists of a floppy disk unit and a terminal with an instruction keyboard. Among them, the floppy disk unit is mainly composed of an "auto-guided" disk that can perform 1) booting the system; 2) a "system" disk for the main system program or diagnostic function; 3) a "layout" disk for storing the layout (electronic layout) It consists of three parts. A data terminal with an instruction keyboard is an operation in which the operator completes the image processing through the man-machine dialogue, and inputs various instructions and parameters using the instruction keyboard. The result is displayed on the display, and the operator can execute the typed instructions. Modify the typed instruction, which is used to start, run, and monitor the imposition system.

(d) Color Monitor

The color monitor has two major functions. One is to visually monitor the image effects and the program layout method of the image processing of the imposition system. Electronic full-page imposition (such as layout design, electronic geometry generation, image borders, image cropping, etc.) and electronic correction of entire images and partial images (such as image tone changes, image displacement, etc.) Perspective transformation, image fusion, etc.) The second is the color pre-proofing function, which uses a color display with a resolution of 1024×1024 or higher, and displays the image after the image processing is completed for further modification by the operator, thereby greatly reducing the blindness of scanning and improving the imposition system. The efficiency of the work and the quality of the output image.

(e) Color Memory Units and Color Converters

The color memory unit is a color database of color impositions used to determine the color values ​​of the pixels of each input image. The color converter is used for color conversion of Y, M, C, BK, H, S, B, H, L, S, and R, G, and B color systems so that various colors can be reproduced on a color display. Printing ink color characteristics, neutral gray balance and a variety of paper colors.

(f) cursor

A cursor, also known as a mouse, is a tool for inputting layout information into a system. Any information can be entered via the cursor without the use of a keyboard or any other control device. It can increase the speed of software program calls and execution.

(g) Function Keyboard

The function keyboard is an image processing software execution system. Each keyboard represents an image processing function and can be roughly divided into 1) layout control instructions: it is used to provide a clear layout feature method and help layout design. 2) Graphical structure instructions: Used to create irregular and regular geometric shapes. 3) Data input command: used to input the figure number, shading color, size and value. 4) Image processing function: used for various corrections of images, editing, electronic air brush and so on. 5) Control instructions: used for function instruction execution, check, delete, edit, etc.

(3) Image output section

The image output section consists of an image output recording device, data terminal, and hard disk storage, as shown in Figure 3.98. When the full-page imposition job is completed, the operator can use the instructions to generate images, graphics and text according to the layout of the layout to generate high resolution image information data, and stored in the system's hard magnetic