Third, the three steps of color management Because different devices (scanners, monitors, printers, printers) deal with the different colors, the color space of their own will be different, it is bound to appear color mismatch phenomenon. For any device, there must be some color outside its color gamut.
Ideally, color should maintain color stability and predictability throughout the design and printing process. However, this requirement for color cannot be achieved naturally, and the color management system (CMS) can overcome this problem to help people achieve the desired color stability and predictability. CMS manages the gamut space of different devices in the workflow, converts scanned RGB color data to CMYK data, and also converts CMYK data to CMYK values ​​for different output devices for color proofing or actual printing.
The basis of color management is to ensure that all devices are in the color reproduction system. To achieve the goal of color management, we must go through three color management steps: device calibration, characterization calibration, and color gamut conversion.
For equipment calibration, some people think that the term “equipment calibration†refers to all the steps to get accurate color, perhaps meaning that the copied color is calibrated to match the original color. However, in fact, calibration equipment is only one of the three steps of color management. The calibration itself does not guarantee the matching of colors. It only calibrates the performance of the equipment itself and only guarantees the equipment (eg scanners, monitors, printers). Reaching its prescribed index provides a way to ensure that it will work stably for a period of time.
Characterization calibration (PRoFiliNg) is a method of measuring and quantifying the color space, color gamut, and color characteristics of a particular device under known circumstances. It is used to determine how to acquire color or record color when an input device or an output device is calibrated. Characterization calibration is the process of actually creating your device description file for scanners, monitors, printers, and more. To achieve characterization calibration requires the device itself to be equipped with a high-performance color sensor, with which color management software can be used in order to implement a true characterization calibration; otherwise these devices must rely on a separate calibration device (such as a color tone meter) , In conjunction with color management software, characteristic calibration can be achieved.
Color gamut conversion (color transfer): This is the process of converting image colors from one device's gamut data to another device's gamut data. Through color management software (commonly known as RTP software), color gamut conversion can be achieved manually or automatically. Switching between the gamuts of different devices is often referred to as gamut mapping.
Fourth, how to choose the digital proofing system Inkjet printing technology proofing system (referred to as digital proofing system) has been more and more used in design proofing and prepress plate proofing, then choose a digital proofing system should consider what factors?
1. Color Accuracy Color accuracy is the accuracy of matching with the target color. To make comparison easier, people now quantify it by choosing a suitable target color gamut and then measuring its deviation through a color management system. People use dE to indicate this deviation. A good digital proofing system should have a dE between 3 and 5. Here are the color effects of dE in different ranges:
1.6 to 3.2 viewed from a distance, basically do not see the difference in color. This is usually considered to be the same color. The color difference of 3.2 to 6.5 is visible, but the color gives the impression that people are basically the same;
The difference of 6.5-1.3 colors can be seen, but it can be considered as the same color tone;
13 to 25 are considered different shades. Above this value, it is considered a different color.
2. Repeatability (stability)
When the same digital file is repeatedly output for many times, the same proofing effect must be obtained. In general, the higher the degree of automation of the entire process, the higher the repeatability. This is difficult to achieve because of the traditional proofing method, because the traditional proofing process must be controlled by someone:
3. Speed ​​For image products with high timeliness requirements (such as various weekly magazines, promotional materials for major events, or time-critical publications), speed is a factor that must be considered.
4. Costs Acquisition costs and printing costs are considerations that people should consider when choosing a proofing system. One of the main reasons that some other proofing methods and even digital proofing methods using ink jet technology were not accepted by people is its excessive cost, especially the purchase cost.
Fifth, HP's latest proofing products and solutions for the needs of graphic designers, Hewlett-Packard timely launched digital proofing products and their solutions. On September 17th, China Hewlett-Packard Co., Ltd. will launch three new “Photos†series A3+ format inkjet printers including the HP DESigNJET 10PS/20PS/50PS. This series of printers is particularly suitable for prepress proofing processes in graphic image fields such as platemaking output centers, advertising design companies, and publication magazines.
The new "Photo Manipulator" has a complete set of color management and output system, unique HP print head technology, built-in RIP (color management) software, HP special proofing media and ink, while complying with APPlE ColoR SYNC, MaCiNToSH and WiNdoWS ICC industrial standard color , to ensure that the full program has a complete color management and output. The new “Photo Manipulator†can achieve unprecedented powerful features:
1. The true and accurate "hand" of "color" proofing can achieve the color standard defined by the printer under certain conditions through the closed-loop color management system. The minimum droplet size is up to 4 picoliters. HP color layering technology and 6 color CMYKCm printing are used. The head can provide a wider color field, while achieving a reduction in granularity and smooth color transmission, combined with built-in Heidelberg professional color management RIP, these features can ensure high-quality picture output and proofing of 2400×1200dPi image speed Color accuracy and truth.
2. Unprecedented “Photography Hand†series of proofing “speed†uses advanced thermal foaming (TIJ) printing technology, uses six print heads, each print head includes 304 print nozzles, and utilizes HP’s unique JET EXPRESS printing technology The speed of proofing is even more at the production level. Only 4 miN is required to print a 13" x 19" image in the best mode.
3. Proofing “distance†network shortening “photoshooters†Using HP Remote Proofing Software allows users to build a complete set of documents containing data content, color profiles and print settings, and transfer them via the Internet in PDF or JPG format. Go anywhere. The receiver only needs to have another “photorealistic hand†to securely receive files while ensuring the consistency of color transmission, storage, and output.
4.Professional “reasonable hand†of proofing “professional†possesses 69CC modular ink of production level, enough to meet the demand for large and repeated proofing, and at the same time, in order to match the speciality of proofing media, there are three proofing media to choose from. , Including highlight proofing paper, matt proofing paper and matte proofing paper.
5. The cost of proofing comprehensive reduction of the lowest configuration "hands" estimated market price is only RMB 10,000 yuan, its supplies are also maintained within the acceptable range of the general consumer group. The price of finished products that are proofed by “photos hands†is about 1/3 cheaper than traditional proofing.
For different users in the graphics world, HP has tailored different digital proofing solutions to meet their needs for design proofing:
For personal image designers and small advertising companies, HP designed the HP DESigNJET 10PS personal design proofing solution. The program enables individual designers to obtain proofing of printing effects in the design room, while satisfying the designer's requirements for speed and price, enhancing the designer's competitiveness and shortening the design cycle.
For large advertising companies, HP introduced the HP DESigNJET 20PS network design proofing solution. This solution can break through the bottleneck that has long been used by designers to use design proofing solutions - excessively high purchase costs, so that advertising designers can get proof of printing effect in the company, which will enhance the competitiveness of advertising companies and shorten the design cycle. Improve efficiency has great help;
For the magazine, HP hopes to adopt a design proofing solution using the HP DESigNJET 20PS with two-sided printing option. The program can ensure that the magazine's design proofing does not need to be sent to the platemaking center, the United States editor can see the magazine sample, thus shortening the design cycle and improving work efficiency;
For small prepress companies, HP has partnered with the HP DESigNJET 50PS color proofing solution. The system is equipped with professional prepress proofing software authorized by Heidelberg (HEidElbERg). It not only meets the needs of prepress users for color proofing, but also easily dissolves the proofing system and the prepress plate process commonly used by users. . As a result, these companies can provide color proofing services to customers without high investment.
HP's “Hands-on-Hand†series of printers and their digital proofing solutions bring new proofing techniques to image designers with their true and accurate proofing color, unprecedented proofing “speed†and low overall proofing cost. They have been freed from the shackles of traditional proofing and have gone to a more flexible, simple, and convenient situation. Hewlett-Packard, with real efforts to hold up the hope of design proofing, make proofing to a more brilliant future.
Ideally, color should maintain color stability and predictability throughout the design and printing process. However, this requirement for color cannot be achieved naturally, and the color management system (CMS) can overcome this problem to help people achieve the desired color stability and predictability. CMS manages the gamut space of different devices in the workflow, converts scanned RGB color data to CMYK data, and also converts CMYK data to CMYK values ​​for different output devices for color proofing or actual printing.
The basis of color management is to ensure that all devices are in the color reproduction system. To achieve the goal of color management, we must go through three color management steps: device calibration, characterization calibration, and color gamut conversion.
For equipment calibration, some people think that the term “equipment calibration†refers to all the steps to get accurate color, perhaps meaning that the copied color is calibrated to match the original color. However, in fact, calibration equipment is only one of the three steps of color management. The calibration itself does not guarantee the matching of colors. It only calibrates the performance of the equipment itself and only guarantees the equipment (eg scanners, monitors, printers). Reaching its prescribed index provides a way to ensure that it will work stably for a period of time.
Characterization calibration (PRoFiliNg) is a method of measuring and quantifying the color space, color gamut, and color characteristics of a particular device under known circumstances. It is used to determine how to acquire color or record color when an input device or an output device is calibrated. Characterization calibration is the process of actually creating your device description file for scanners, monitors, printers, and more. To achieve characterization calibration requires the device itself to be equipped with a high-performance color sensor, with which color management software can be used in order to implement a true characterization calibration; otherwise these devices must rely on a separate calibration device (such as a color tone meter) , In conjunction with color management software, characteristic calibration can be achieved.
Color gamut conversion (color transfer): This is the process of converting image colors from one device's gamut data to another device's gamut data. Through color management software (commonly known as RTP software), color gamut conversion can be achieved manually or automatically. Switching between the gamuts of different devices is often referred to as gamut mapping.
Fourth, how to choose the digital proofing system Inkjet printing technology proofing system (referred to as digital proofing system) has been more and more used in design proofing and prepress plate proofing, then choose a digital proofing system should consider what factors?
1. Color Accuracy Color accuracy is the accuracy of matching with the target color. To make comparison easier, people now quantify it by choosing a suitable target color gamut and then measuring its deviation through a color management system. People use dE to indicate this deviation. A good digital proofing system should have a dE between 3 and 5. Here are the color effects of dE in different ranges:
1.6 to 3.2 viewed from a distance, basically do not see the difference in color. This is usually considered to be the same color. The color difference of 3.2 to 6.5 is visible, but the color gives the impression that people are basically the same;
The difference of 6.5-1.3 colors can be seen, but it can be considered as the same color tone;
13 to 25 are considered different shades. Above this value, it is considered a different color.
2. Repeatability (stability)
When the same digital file is repeatedly output for many times, the same proofing effect must be obtained. In general, the higher the degree of automation of the entire process, the higher the repeatability. This is difficult to achieve because of the traditional proofing method, because the traditional proofing process must be controlled by someone:
3. Speed ​​For image products with high timeliness requirements (such as various weekly magazines, promotional materials for major events, or time-critical publications), speed is a factor that must be considered.
4. Costs Acquisition costs and printing costs are considerations that people should consider when choosing a proofing system. One of the main reasons that some other proofing methods and even digital proofing methods using ink jet technology were not accepted by people is its excessive cost, especially the purchase cost.
Fifth, HP's latest proofing products and solutions for the needs of graphic designers, Hewlett-Packard timely launched digital proofing products and their solutions. On September 17th, China Hewlett-Packard Co., Ltd. will launch three new “Photos†series A3+ format inkjet printers including the HP DESigNJET 10PS/20PS/50PS. This series of printers is particularly suitable for prepress proofing processes in graphic image fields such as platemaking output centers, advertising design companies, and publication magazines.
The new "Photo Manipulator" has a complete set of color management and output system, unique HP print head technology, built-in RIP (color management) software, HP special proofing media and ink, while complying with APPlE ColoR SYNC, MaCiNToSH and WiNdoWS ICC industrial standard color , to ensure that the full program has a complete color management and output. The new “Photo Manipulator†can achieve unprecedented powerful features:
1. The true and accurate "hand" of "color" proofing can achieve the color standard defined by the printer under certain conditions through the closed-loop color management system. The minimum droplet size is up to 4 picoliters. HP color layering technology and 6 color CMYKCm printing are used. The head can provide a wider color field, while achieving a reduction in granularity and smooth color transmission, combined with built-in Heidelberg professional color management RIP, these features can ensure high-quality picture output and proofing of 2400×1200dPi image speed Color accuracy and truth.
2. Unprecedented “Photography Hand†series of proofing “speed†uses advanced thermal foaming (TIJ) printing technology, uses six print heads, each print head includes 304 print nozzles, and utilizes HP’s unique JET EXPRESS printing technology The speed of proofing is even more at the production level. Only 4 miN is required to print a 13" x 19" image in the best mode.
3. Proofing “distance†network shortening “photoshooters†Using HP Remote Proofing Software allows users to build a complete set of documents containing data content, color profiles and print settings, and transfer them via the Internet in PDF or JPG format. Go anywhere. The receiver only needs to have another “photorealistic hand†to securely receive files while ensuring the consistency of color transmission, storage, and output.
4.Professional “reasonable hand†of proofing “professional†possesses 69CC modular ink of production level, enough to meet the demand for large and repeated proofing, and at the same time, in order to match the speciality of proofing media, there are three proofing media to choose from. , Including highlight proofing paper, matt proofing paper and matte proofing paper.
5. The cost of proofing comprehensive reduction of the lowest configuration "hands" estimated market price is only RMB 10,000 yuan, its supplies are also maintained within the acceptable range of the general consumer group. The price of finished products that are proofed by “photos hands†is about 1/3 cheaper than traditional proofing.
For different users in the graphics world, HP has tailored different digital proofing solutions to meet their needs for design proofing:
For personal image designers and small advertising companies, HP designed the HP DESigNJET 10PS personal design proofing solution. The program enables individual designers to obtain proofing of printing effects in the design room, while satisfying the designer's requirements for speed and price, enhancing the designer's competitiveness and shortening the design cycle.
For large advertising companies, HP introduced the HP DESigNJET 20PS network design proofing solution. This solution can break through the bottleneck that has long been used by designers to use design proofing solutions - excessively high purchase costs, so that advertising designers can get proof of printing effect in the company, which will enhance the competitiveness of advertising companies and shorten the design cycle. Improve efficiency has great help;
For the magazine, HP hopes to adopt a design proofing solution using the HP DESigNJET 20PS with two-sided printing option. The program can ensure that the magazine's design proofing does not need to be sent to the platemaking center, the United States editor can see the magazine sample, thus shortening the design cycle and improving work efficiency;
For small prepress companies, HP has partnered with the HP DESigNJET 50PS color proofing solution. The system is equipped with professional prepress proofing software authorized by Heidelberg (HEidElbERg). It not only meets the needs of prepress users for color proofing, but also easily dissolves the proofing system and the prepress plate process commonly used by users. . As a result, these companies can provide color proofing services to customers without high investment.
HP's “Hands-on-Hand†series of printers and their digital proofing solutions bring new proofing techniques to image designers with their true and accurate proofing color, unprecedented proofing “speed†and low overall proofing cost. They have been freed from the shackles of traditional proofing and have gone to a more flexible, simple, and convenient situation. Hewlett-Packard, with real efforts to hold up the hope of design proofing, make proofing to a more brilliant future.
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