Printing color quality monitoring method and device and storage medium

Abstract

The invention provides a printing color quality monitoring method and device and a storage medium. The method comprises the steps of obtaining a feature color block of a to-be-printed file; a color band is manufactured based on the standard color blocks and the characteristic color blocks; printing the to-be-printed file according to the colored tape to obtain a printing sample; and comparing the printing sample page with the target sample page, and judging whether the printing sample page meets the requirement or not. According to the invention, the characteristic value of the product color is added into the color band, so that the accuracy of measurement and calculation of the product color is effectively improved, the monitoring of the product color is more targeted, and the monitoring quality is improved.

Description

Technical Field

[0001] The present application relates to the field of printing, and in particular to a printing color quality monitoring method, device and storage medium. Background Art

[0002] Existing printing quality monitoring usually uses a set control strip similar to PressSign to evaluate the stability of printing quality. This control strip is basically a single long strip distribution, containing basic information such as density / dot gain / color / overprint / gray balance, etc. The stability of printing quality is usually evaluated through a scoring system.

[0003] The existing evaluation system is only based on the comparison with the standard color block, and does not include the color characteristic color blocks directly related to the printing file. In addition, the tolerance standard requirements are superimposed, so it cannot achieve good quality monitoring and tracking for some products. Moreover, the existing measurement and control methods are based on the layout measurement and control strips, which cannot be flexibly changed according to the actual product information. And it does not include the key color block information of the product. The evaluation tolerance is based on ISO 12647-2, and it cannot be flexibly changed according to the special paper / ink, so it is insufficient for the quality monitoring of non-standard paper / ink products. The scoring system only determines the quality level of the product through a single score, but due to the lack of standards for some key colors, there is often a problem that the score is high and the product color has unacceptable deviations.

[0004] The contents of the background technology section are merely the technologies known to the inventors and do not necessarily represent the prior art in the field. Summary of the invention

[0005] In view of at least one of the problems in the prior art, a first object of the present invention is to provide a printing color quality monitoring method, comprising:

[0006] S1: Obtaining characteristic color blocks of the document to be printed;

[0007] S2: Producing a color band based on the standard color block and the characteristic color block;

[0008] S3: Printing the document to be printed according to the ribbon to obtain a printed sample; and

[0009] S4: Compare the printed sample with the target sample to determine whether the printed sample meets the requirements.

[0010] In some embodiments of the present application, step S1 includes:

[0011] Determining the characteristic color of the document to be printed; and

[0012] The characteristic color block is generated according to the characteristic color.

[0013] In some embodiments of the present application, the color ribbon includes a first color ribbon and a second color ribbon, the first color ribbon includes the standard color block, and the second color ribbon includes the characteristic color block.

[0014] In some embodiments of the present application, step S4 includes:

[0015] Obtaining a detected color value of the printed sample;

[0016] Determining whether first differences between the detected color value and the standard color value of the target sample are all within a predetermined range; and

[0017] If yes, the test passes.

[0018] In some embodiments of the present application, step S4 further includes:

[0019] If the first difference is not all within the predetermined range, detecting the density and TVI curve of the printed sample;

[0020] Calculating a second difference between the density and TVI curve of the printed sample and the density and TVI curve of the target sample;

[0021] obtaining a color compensation curve based on the second difference; and

[0022] The to-be-printed document is adjusted based on the color compensation curve, and steps S1 to S4 are repeated until all the first difference values ​​are within the predetermined range.

[0023] In some embodiments of the present application, the detected color values ​​include one or more of dot gain values, spot colors, product feature colors, product feature color hue difference values, product feature color brightness difference values, combined gray phase difference values, combined gray brightness difference values, CMYK initial hue difference values, CMYK initial brightness difference values, CMYKRGB initial values, pixels of all colors, and base color values.

[0024] The second object of the present application is to provide a printing color quality monitoring device, comprising:

[0025] Processor; and

[0026] A memory stores computer instructions, and when the computer instructions are executed by the processor, the processor executes the quality monitoring method as described in any one of the above items.

[0027] In some embodiments of the present application, the quality monitoring device further includes a display panel for displaying whether the printed sample meets the requirements.

[0028] In some embodiments of the present application, the display panel is further used to display the first difference between the detected color value and the standard color value.

[0029] The third object of the present application is to provide a non-transitory computer storage medium storing a computer program, which, when executed by one or more processors, enables the processor to execute the quality monitoring method as described in any one of the above items.

[0030] The present invention adds product color characteristic values ​​into the color band, effectively improving the accuracy of product color measurement calculation, making the monitoring of product color more targeted and improving the monitoring quality.

[0031] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings constituting a part of the present disclosure are used to provide a further understanding of the present disclosure. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0033] Figure 1 A schematic diagram of a process flow for monitoring printing color quality provided by an embodiment of the present invention is shown.

[0034] Figure 2 A color ribbon provided by an embodiment of the present invention is shown.

[0035] Figure 3 Shows Figure 2 The relationship between the characteristic color blocks in the color band shown and the file to be printed.

[0036] Figure 4 A screenshot of the detection result provided by an embodiment of the present invention is shown.

[0037] Figure 5 A screenshot of a process calculation value when a detection result fails provided by an embodiment of the present invention is shown.

[0038] Figure 6 A screenshot showing the difference between a TVI curve of a printed sample and a TVI curve of a target sample provided by an embodiment of the present invention is shown.

[0039] Figure 7 Shown according to Figure 6 Screen shot of the color compensation curve obtained by the difference shown.

[0040] Figure 8 A document to be printed provided by another embodiment of the present invention is shown.

[0041] Fig. 9 Shown according to Figure 8 The ribbon shown is made for the document to be printed.

[0042] Fig.10 Shows Figure 8 The screenshot shown is a sample inspection result after printing the document to be printed.

[0043] Fig.11 Shows Fig.10 Screen shot of the process calculation values ​​of the test results shown.

[0044] Fig.12 A screenshot of the content displayed on the display panel of the quality monitoring device provided by an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0045] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0046] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0047] As used herein, "about" or "approximately" includes the stated value and means within an acceptable range of deviation from the particular value as determined by one skilled in the art, taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, "about" can mean within one or more standard deviations, or within ±30%, ±20%, ±10%, or ±5% of the stated value.

[0048] The following is a more detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings and examples, so that the scheme of the present invention and its advantages in various aspects can be better understood. However, the specific embodiments and examples described below are only for the purpose of illustration, rather than for limiting the present invention.

[0049] Figure 1A printing color quality monitoring method provided in an embodiment of the present application is shown, including the following steps S1-S4.

[0050] S1: Obtain a characteristic color block of a document to be printed.

[0051] Optionally, in the present invention, step S1 includes: determining a characteristic color of the document to be printed; and generating the characteristic color block according to the characteristic color.

[0052] The characteristic color block is the color block that reflects the characteristic color in the document to be printed. For example, if the main colors of the document to be printed are red, yellow, blue, and green, then the characteristic color blocks are red, yellow, blue, and green. The more characteristic color blocks are selected, the more targeted the monitoring of product color can be, but setting too many will reduce the detection efficiency.

[0053] S2: Create color bands based on standard color blocks and characteristic color blocks.

[0054] Optionally, in the present invention, the color ribbon includes a first color ribbon and a second color ribbon, the first color ribbon includes a standard color block, and the second color ribbon includes a characteristic color block.

[0055] Figure 2 The color band provided by an embodiment of the present invention is shown. In the figure, the first row is the above-mentioned first color band, including standard color blocks; the second row is variable color blocks, including the above-mentioned characteristic color blocks. Figure 2 The middle green color block is the characteristic color block. It should be noted that all the color blocks in the second row of variable color blocks are changeable. Of course, when the file to be printed is changed, only the characteristic color block can be changed. For example Figure 3 shown.

[0056] Figure 3 The characteristic colors in the document to be printed include blue, bright yellow, light yellow, white and light gray. The characteristic color blocks corresponding to the above characteristic colors can be replaced Figure 2 The green color block in the color band shown is replaced as shown by the arrow. In this way, after the characteristic color blocks are replaced, the new color band is completed.

[0057] Figure 2 The ribbon shown is a small ribbon, which can save paper and provide ease of use and accuracy of monitoring. In this application, a small ribbon is designed according to production monitoring requirements, and variable data is added to the ribbon for product color evaluation, which plays a role in focusing on product color.

[0058] S3: Print the document to be printed according to the ribbon to obtain a printing sample.

[0059] This step prints the document to be printed and obtains a printing sample.

[0060] S4: Compare the printed sample with the target sample to determine whether the printed sample meets the requirements.

[0061] Optionally, in the present invention, step S4 includes: obtaining the detected color value of the printed sample; and determining whether the first difference between the detected color value and the standard color value of the target sample is all within a predetermined range; if so, passing the detection. Since all the differences are required to be within the predetermined range, the monitoring standard is improved, which is conducive to improving the quality of the printed document.

[0062] Optionally, the detected color value and the standard color value respectively include one or more of the dot gain value, the spot color, the product characteristic color, the product characteristic color hue difference value, the product characteristic color brightness difference value, the combined gray phase difference value, the combined gray brightness difference value, the CMYK initial hue difference value, the CMYK initial brightness difference value, the CMYKRGB initial value, the pixels of all colors and the base color value. These detected values ​​include the printing sample base and most of the important color indicators, which can effectively reflect the color of the sample. Of course, the present invention can also select other color values ​​as indicators as needed.

[0063] Figure 4 FIG. 2 shows the detection results provided by an embodiment of the present invention. Figure 4 It can be seen that all the first difference values ​​of the sample are within the predetermined range, and therefore pass the test.

[0064] Optionally, step S4 further includes:

[0065] If the first difference is not all within the predetermined range, detecting the density and TVI curve of the printed sample;

[0066] Calculating a second difference between the density and TVI curve of the printed sample and the density and TVI curve of the target sample;

[0067] obtaining a color compensation curve based on the second difference; and

[0068] The document to be printed is adjusted based on the color compensation curve, and steps S1-S4 are repeated until all the first difference values ​​are within a predetermined range.

[0069] Figure 5 The process calculation value when the test result fails is shown, where the red value is the value that does not meet the requirements. At this time, the file to be printed can be adjusted by obtaining the color compensation curve. Figure 6 The difference between the TVI curve of the printed sample provided by an embodiment of the present invention and the TVI curve of the target sample is shown. Figure 7 Shown according to Figure 6 The color compensation curve obtained by the difference and density difference shown in FIG. The document to be printed is adjusted based on the color compensation curve, and steps S1-S4 are repeated until all the first difference values ​​are within the predetermined range.

[0070] When the first difference is not entirely within the predetermined range (ie, the test fails), the document to be printed can be adjusted by obtaining a color compensation curve until the test passes. Of course, if the customer only needs to know which parts fail, this step is not necessary.

[0071] The present invention adds product color characteristic values ​​into the color band, effectively improving the accuracy of product color measurement calculation, making the monitoring of product color more targeted and improving the monitoring quality.

[0072] A specific embodiment is provided below for illustration.

[0073] Figure 8 The document to be printed provided by the embodiment is shown in FIG. It can be seen from the document to be printed that there are seven characteristic color blocks, namely low saturation red, purple, low saturation green, light pink, brown, coffee color, and light brown. A color ribbon is produced based on the characteristic color blocks and the standard color blocks, such as Fig. 9 shown.

[0074] according to Fig. 9 The ribbon shown is used to print the document to be printed, obtain the printed sample, perform the test, and then compare it with the target sample. The result is as follows Fig.10 As shown. Fig.10 It can be seen that all indicators have passed, so the test result is passed. Fig.11 Shows Fig.10 The process calculation values ​​of the detection results are shown.

[0075] The printing color quality monitoring method of the present invention can be implemented in the form of a quality monitoring device or a non-transient computer storage medium.

[0076] The device comprises a processor and a memory, wherein the memory stores computer instructions, and when the computer instructions are executed by the processor, the processor executes the printing color quality monitoring method.

[0077] The non-transitory computer storage medium includes a computer program stored thereon. When the computer program is executed by one or more processors, the processors are enabled to execute the above-mentioned printing color quality monitoring method.

[0078] Optionally, the quality monitoring device further comprises a display panel for displaying whether the printed sample meets the requirements, for example, Figure 4 Optionally, the display panel is also used to display the first difference between the detected color value and the standard color value, for example Figure 5 Displayed on the display panel.

[0079] Fig.12The content displayed on the display panel of the quality monitoring device provided by an embodiment of the present invention is shown. The first table in the figure is a screenshot of the detection result, and the second table shows the position detected by the figure and the color value of the corresponding position. The red circle in the left figure represents the detection position, and the number corresponds to the number in the detection result on the right. The red number corresponds to the "Product Features Color" part in the figure, and the black number corresponds to the "Spot color" part. Fig.12 The color difference corresponding to the product's characteristic color can be viewed intuitively. When the color difference is within the tolerance range, it will be displayed in green. When the color difference exceeds the tolerance range, it will be displayed in red. In this way, customers can intuitively see the detected position and color difference.

[0080] It should be understood that the above-mentioned device embodiments are only illustrative, and the device of the present application can also be implemented in other ways. For example, the division of units / modules described in the above-mentioned embodiments is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units, modules or components can be combined, or can be integrated into another system, or some features can be ignored or not executed.

[0081] The units or modules described as separate components may or may not be physically separated. The components described as units or modules may or may not be physical units, that is, they may be located in one device or distributed on multiple devices. The solutions of the embodiments in the present application may be implemented by selecting some or all of the units therein according to actual needs.

[0082] In addition, unless otherwise specified, each functional unit / module in each embodiment of the present application may be integrated into one unit / module, each unit / module may exist physically separately, or two or more units / modules may be integrated together. The above-mentioned integrated unit / module may be implemented in the form of hardware or in the form of a software program module.

[0083] If the integrated unit / module is implemented in the form of hardware, the hardware may be a digital circuit, an analog circuit, etc. The physical implementation of the hardware structure includes but is not limited to transistors, memristors, etc. If not otherwise specified, the processor may be any appropriate hardware processor, such as a CPU, a GPU, an FPGA, a DSP, an ASIC, etc. If not otherwise specified, the storage unit may be any appropriate magnetic storage medium or magneto-optical storage medium, such as a resistive random access memory RRAM (Resistive Random Access Memory), a dynamic random access memory DRAM (Dynamic Random Access Memory), a static random access memory SRAM (Static Random-Access Memory), an enhanced dynamic random access memory EDRAM (Enhanced Dynamic Random Access Memory), a high-bandwidth memory HBM (High-Bandwidth Memory), a hybrid memory cube HMC (Hybrid Memory Cube), etc.

[0084] If the integrated unit / module is implemented in the form of a software program module and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a memory, including a number of instructions to enable a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned memory includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or CD-ROM and other media that can store program codes.

[0085] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0086] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A printing color quality monitoring method, characterized in that: include: S1: Obtaining characteristic color blocks of the document to be printed; S2: Producing a color band based on the standard color block and the characteristic color block; S3: Printing the document to be printed according to the ribbon to obtain a printed sample; as well as S4: Compare the printed sample with the target sample to determine whether the printed sample meets the requirements.

2. The quality monitoring method according to claim 1, characterized in that: Step S1 includes: Determining the characteristic color of the document to be printed; and The characteristic color block is generated according to the characteristic color.

3. The quality monitoring method according to claim 1, characterized in that: The color band includes a first color band and a second color band, the first color band includes the standard color block, and the second color band includes the characteristic color block.

4. The quality monitoring method according to claim 1, characterized in that: Step S4 includes: Obtaining a detected color value of the printed sample; Determining whether first differences between the detected color value and the standard color value of the target sample are all within a predetermined range; and If yes, the test passes.

5. The quality monitoring method according to claim 4, characterized in that: Step S4 also includes: If the first difference is not all within the predetermined range, detecting the density and TVI curve of the printed sample; Calculating a second difference between the density and TVI curve of the printed sample and the density and TVI curve of the target sample; obtaining a color compensation curve based on the second difference; and The to-be-printed document is adjusted based on the color compensation curve, and steps S1 to S4 are repeated until all the first difference values ​​are within the predetermined range.

6. The quality monitoring method according to claim 4, characterized in that: The detected color values ​​include one or more of dot gain values, spot colors, product characteristic colors, product characteristic color hue difference values, product characteristic color brightness difference values, combined gray phase difference values, combined gray brightness difference values, CMYK initial hue difference values, CMYK initial brightness difference values, CMYKRGB initial values, pixels of all colors, and base color values.

7. A printing color quality monitoring device, characterized in that: include: processor; as well as A memory storing computer instructions, which, when executed by the processor, enables the processor to execute the quality monitoring method according to any one of claims 1 to 6.

8. The quality monitoring device according to claim 7, characterized in that: It also includes a display panel for displaying whether the printed sample meets the requirements.

9. The quality monitoring device according to claim 8, characterized in that: The display panel is further used to display the first difference between the detected color value and the standard color value.

10. A non-transitory computer storage medium storing a computer program, which, when executed by one or more processors, enables the processors to execute the quality monitoring method according to any one of claims 1 to 6.

Images