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GB/T 43835-2024: Graphic technology - Prepress data exchange - Preparation and visualization of RGB images to be used in RGB-based graphics arts workflows
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Graphic technology - Prepress data exchange - Preparation and visualization of RGB images to be used in RGB-based graphics arts workflows
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GB/T 43835-2024
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Basic data | Standard ID | GB/T 43835-2024 (GB/T43835-2024) | | Description (Translated English) | Graphic technology - Prepress data exchange - Preparation and visualization of RGB images to be used in RGB-based graphics arts workflows | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A17 | | Classification of International Standard | 37.100.99 | | Word Count Estimation | 42,481 | | Date of Issue | 2024-03-15 | | Date of Implementation | 2024-03-15 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 43835-2024: Graphic technology - Prepress data exchange - Preparation and visualization of RGB images to be used in RGB-based graphics arts workflows
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ICS 37.100.99
CCSA17
National Standards of People's Republic of China
Printing Technology Prepress Data Exchange
RGB -based printing workflow using RGB
Image preparation and visualization
(ISO 16760.2014, IDT)
Released on 2024-03-15
2024-03-15 implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and Definitions 2
4 RGB Workflow Overview 3
4.1 Overview 3
4.2 RGB reference image 3
4.2.1 Configuration of RGB workflow 3
4.2.2 Setup and Calibration 4
4.2.3 Operation process 4
4.2.4 Highlight and dark adjustment 5
4.2.5 Other data requirements 5
4.3 Simulating printing workflow 5
4.3.1 Basic functions of simulating printing workflow 5
4.3.2 Basic Function Implementation Method 6
5 File format requirements 7
5.1 Data Delivery 7
5.2 File format extensions 7
5.2.1 Overview 7
5.2.2 Tiff file 8
5.2.3 JPEG (JFIF and EXIF) 9
5.3 XMP data for approval status 10
6 RGB Reference Prints 10
6.1 Color measurement and observation 10
6.2 RGB Reference Print Requirements10
6.2.1 Printing substrate color 10
6.2.2 Margin Information 11
6.2.3 Printing stability 11
6.2.4 RGB digital control bar 11
6.3 Periodic Inspection of RGB Reference Printers 11
6.3.1 Color requirements 11
6.3.2 Determine the target value 12
6.3.3 Copying the Gradient Image 12
6.3.4 Conformance Test 12
Appendix A (Informative) Relationship between highlight and neutral grayscale values 13
Appendix B (Normative) Observation conditions 15
Appendix C (Normative) RGB Reference Print Color Test Table 16
Appendix D (Informative) Key RGB Workflow Concepts 21
Appendix E (informative) Examples of target values for generic mapping options 25
Appendix F (Normative) Medium-dependent measurements 26
Appendix G (Normative) JPEG Extension (JPEG-XT) Marker Section 28
Reference 31
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document is equivalent to ISO 16760.2014 "Printing technology prepress data exchange based on RGB printing workflow use
Preparation and Visualization of RGB Images.
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document is submitted by the State Administration of Press and Publication.
This document is under the jurisdiction of the National Printing Standardization Technical Committee (SAC/TC170).
This document was drafted by. Shenzhen Polytechnic, Tianling Precision Platemaking (Shenzhen) Co., Ltd., Shenzhen Ziguang Puyinjia Graphic System
Co., Ltd., Beijing Printing Industry Product Quality Supervision and Inspection Station, Shenzhen Printing Industry Association, Guangdong Haifu Intelligent Environmental Protection Technology Co., Ltd.
Beijing Huilin Printing Co., Ltd., Zhejiang Puqi Digital Technology Co., Ltd., Shanghai Tobacco Packaging and Printing Co., Ltd., Shenzhen Yuezhi Color Printing Co., Ltd.
Brush Co., Ltd., Zhejiang Yuanjin Packaging Co., Ltd., Jiangnan University, Hangzhou Dianzi University, Liaocheng Product Quality Supervision and Inspection Institute, Shandong
Tiancheng Testing and Certification Co., Ltd., Wenzhou Zhiliang Industrial Co., Ltd., Guangdong Xingyi Digital Printing Co., Ltd., Shenzhen Yinzhi Internet Information
Technology Co., Ltd., Changge Dayang Paper Co., Ltd., Hubei Qiangda Packaging Industry Co., Ltd., Ulanhot Senhui Printing Co., Ltd., An
Huixinhua Printing Co., Ltd.
The main drafters of this document are. Xu Xiangyang, Wang Lijie, Fan Haifeng, Liu Chengwu, Tao Xiuting, Gong Rongrong, Li Shikai, Zhang Xuliang, Chen Xiulan,
Ge Jizhe, Li Zhong, Xu Yongqiang, Peng Wei, Li Hui, Lv Zhijun, Wang Mengmeng, Wang Qiang, Chen Chen, Wang Xiufang, Song Fangbing, Huang Zhen, Shen Lin, Hu Xiaopeng,
Feng Rui, Feng Yi, Du Wanquan, Zhang Liangcai, Yang Siyu, Shuai Kefan, Liu Xia, Cheng Jianwen, Wang Yan, Chen Jun, and Cui Yong.
Introduction
This document provides guidelines for image preparation and press simulation in a print workflow using RGB images (RGB workflow).
Digital camera (DSC) images have now largely replaced film in the prepress stage of printing technology, and most printed original images
The standard document conversion using PDF/X-4 and PDF/X-5 formats supports the use of RGB content and provides a
A "late binding" printing solution that performs color conversion only when the document is printed. In this way, all original image data is preserved.
These standard document formats provide a
The ideal framework for an RGB workflow.
The best method for current image preparation is to view and adjust the image on a monitor. When adjusting RGB images, use a calibrated monitor.
Select the proofing mode with reference printing conditions. In this way, users can accurately preview the printing results. The workflow is shown in Figure 1.
shown.
Figure 1 The current best RGB workflow solution
This workflow has some limitations.
--- Although it is possible to set the display and calibration specified by AdobeRGB (1998) color image encoding or ISO /IEC 61966-2-1
viewing environment, but usually not all parties involved have calibrated monitors and the same viewing conditions.
In the workflow, stakeholders can easily share RGB reference prints;
--- For inexperienced users, evaluating color on screen is more difficult than evaluating it on print and the color results may not be what you expect.
As expected by users, the proposed RGB workflow is suitable for both experts and inexperienced users;
---The expected printing conditions must be communicated to each relevant party in an independent manner. All users need to know how to establish a suitable printing condition.
In the proposed RGB workflow, the expected printing conditions are included in the image as metadata;
---The approval status of the image is not clearly expressed. In the proposed RGB workflow, the approval status is included in the image as metadata.
Like in.
The proposed RGB workflow describes these limitations, as shown in Figure 2.In this RGB workflow, candidate images are
Print on a standard RGB reference printer to produce an accurate simulation of the expected printing conditions. Check these
The image is printed and, if necessary, further adjusted to achieve the desired printing result.
Add metadata that describes the intended printing conditions and approval status of the image.
Figure 2 RGB workflow from scene to print using RGB image data
Careful preparation of RGB images is key to a successful RGB workflow. When preparing images for printing, there are many aspects to consider, including the image
Confirmation of highlights and shadows, and accurate mapping of important image colors to the press color gamut.
The size and shape of the image are significantly different from the set of colors represented in the image, so when editing the image, you need to be careful to preserve important colors.
This is done efficiently by associating RGB images with CMYK printing profiles. This document describes how to prepare these RGB images. Figure 2
shows the RGB workflow described in this document, R'G'B' is the prepared RGB image.
Note. For the proposed workflow, although the soft proofing observation environment does not need to be calibrated, the reference printer needs to be calibrated and the observation needs to be observed in the standard calibration observation environment.
If possible, use an automatically calibrated printer if the user is not familiar with the calibration process.
This workflow allows images to be prepared and merged into documents that can be printed on a variety of printing systems to produce external
View similar prints.
When RGB image data is received based on hard copy prints, consistent judgments can be obtained.
The workflow supports PDF/X-4 and PDF/X-5 standard document formats. Documents are expected to be in ISO 12647-8 (certified print)
Or ISO 12647-7 (contract sample) for audit.
A printing system that meets the requirements of ISO 12647-8 or ISO 12647-7 can be developed to produce printed products in accordance with this document.
The system will be expanded to produce RGB reference prints. This system will provide users with a simple way to ensure that these images are printed reliably.
images or documents containing these images.
This workflow involves images that will be printed in four colors for commercial use. Photographers need to be aware that other possible printing methods may be required under certain printing conditions.
An alternative version of the image file.
Appendix D provides key details of the RGB workflow concept.
Printing Technology Prepress Data Exchange
RGB -based printing workflow using RGB
Image preparation and visualization
1 Scope
This document specifies the RGB working principle for print production based on reflective prints (RGB reference prints) as a means of evaluating color images.
Provides guidelines for the creation of RGB images targeted for printing (RGB reference images) and simulated printed products.
This document specifies that two ICC (International Color Consortium) profiles are required for each image to be recognized. an image profile and
A profile that describes a reference printing system. These profiles provide individual color transformations for gamut mapping and separations.
Any guidance on how to specify these gamut mappings or separation transformations is appreciated.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
conditions)
ISO 11664-4 (CIES014-4/E.2007) Chromatography Part 4.CIE1976 L*a*b* Color Space (Colorime-
try-Part 4.CIE1976L*a*b*colourspace)
Note. GB/T 20147.4-2023 Chromatography Part 4.CIE1976L*a*b* Color Space (ISO /CIE11664-4.2019, MOD)
ISO 12234-1 Electronic still image portable storage Part 1.Basic portable storage model
ISO 13655 Graphic technology - Spectral measurement and colorimetry of printed images
Note. GB/T 19437-2004 Printing technology Spectral measurement and colorimetric calculation of printed images (ISO 13655.1996, IDT)
ISO 15076-1.2010 Imaging technology – Color management – Structure, file format and data structure – Part 1.Based on the standard ICC.1-
Based on ICC.1.2010)
ISO 15790 Documentation and procedures for the use of certified reference materials for graphic arts and photographic reflectance and transmittance metrology, including combined standards
standarduncertainty)
compensation)
ISO 19445 Graphic technology Metadata for printing processes XMP metadata for images and document proofs (Graphictech-
ISO /IEC 10918-1 Information technology - Digital compression and coding of continuously modulated still images - Part 1.Requirements and guidelines
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