In order to become a qualified image processing staff, it is necessary to master the following aspects: basic printing common sense, basic knowledge of color science and color management, basic printing process of this unit or downstream, PHOTOSHOP about "color Basic understanding of settings, understanding of the characteristics of commonly used tools, data structure characteristics of type pictures, reasonable processing steps combined with specific processing content and corresponding correct data control.
It can be said that all the quality control aspects of lithographic offset printing are based on the transmission of outlets and outlets. If there is no basic understanding of outlet knowledge, at least it is impossible to understand the meaning of data changes on the information panel in PHOTOSHOP. . Without the basic knowledge of color science and color management, the color separation process cannot be accurately controlled; at the same time, the accurate screen display needs to be realized through color management. The “color setting†is closely integrated with the printing process. Without knowing the back-end printing process, the correctness of the color setting cannot be guaranteed, and the correct color separation is even more difficult to talk about. The so-called common tools are not just "brightness / contrast", "levels" and "curves". If you only use these three, I am afraid that the visual effects and work efficiency are not satisfactory, and the data control in key content. It will also get out of control (I personally do not advocate the use of the "brightness / contrast" tool, this tool can not effectively grasp the accuracy of data control). As for the characteristics of each tool, I believe that it should be based on in-depth understanding to achieve strengths and avoid weaknesses and complementary advantages.
I think that should be the basis for doing a good job of image processing. In fact, the process of image processing is not only the process of visual beautification, but also the process of data control. Only the visual beautification based on reasonable data structure is achievable. In layman's terms, it is not printed on the screen. It must be good. After all, all the efforts in the early stage are for the print reproduction of the back end. If the print reproduction is uncontrollable, all your efforts will be half the battle.
Relevant knowledge, screen correction, color separation settings, etc. will also have a special article to introduce to you, this article is limited to the precautions in the image processing process.
The same is the picture processing, the characteristics of business and newspaper industry are very different, let's talk about the business field first.
In commercial applications, high-quality manuscripts and poor manuscripts have different concerns in the process. Generally speaking, the high-quality manuscripts obtained by the handlers have been eclipsed by electric separation and other processes. Some people think that the manuscript of the electricity score must be good, because such manuscripts tend to be good in visual effects, but it should be emphasized that this is a misunderstanding. We must determine whether the data structure of the image is through our own inspection. Reasonable, because the screen display does not fully reflect the real situation of the image data, especially on the gray axis. The quality of a picture does not depend entirely on color and level. Gray balance data and black version structure errors will often give you a fatal blow during the printing process. At that time, the loss of materials will not be said. I am afraid that the time will be irreparable, so the inspection beforehand is very important. In general, the overall contrast of the picture depends on the total amount of ink. The length and thickness of the black version are determined by the content characteristics of the picture. The gray balance data is determined by the back-end printing. If the data deviation is large, do not expect it. Make corrections in PHOTOSHOP and re-energize if necessary. A good manuscript does not need to be adjusted too much. It is nothing more than the optimization of the details. However, the manuscript with good quality or even poor quality will have certain difficulty in handling. At this time, the calibration is very important, without calibration. Manuscripts often do not guarantee overall contrast and color reproduction. Some people are used to scaling in CMYK mode, I think it is not suitable, should be scaled in RBG mode, and then adjust the brightness and contrast of the image after the appropriate adjustment, because the brightness and contrast will be adjusted in CMYK mode It has a very bad influence on the gray balance data.
A good manuscript is faithfully reproduced for business, and for the newspaper industry, any manuscript needs to be re-optimized, nothing more than the difference between the number of steps and the difficulty.
Practically speaking, the characteristics of newspaper production are very time-sensitive, and the production efficiency per unit time is high, and from the scope of adjustment and the extent of change, newspaper pictures are much larger than commercial pictures. In this case, the idea of ​​mapping is even more important. First of all, we must analyze the picture, what is the problem, what is the nature of the problem, what to adjust first, what to adjust later, what tools to use, etc., must think beforehand. The manuscript of the newspaper picture, whether it is the manuscript of the newspaper photojournalist or the Xinhua News Agency or the online picture, is basically RGB, and the newsprint printing network is expanded much larger than the coated paper, and at the same time, to ensure the dark level A large amount of background color removal is used in the four colors, which in turn determines that the image adjustment process basically needs to increase the brightness, and at the same time control the color separation. How to maintain the coordination of brightness and contrast during the adjustment process, how to ensure that the local adjustment does not affect the overall data structure of the picture, how to ensure the saturation and uniformity of color saturation and neutral gray, this is all before the real hands It is necessary to consider clearly, because fundamentally, the adjustment process of the picture is actually a process of continuous loss. For example, the brightness of the center-lighting is improved, the brightness of the surface is more distinct, and the contrast is larger. Sacrificing the level of the dark level, but you think that this sacrifice is acceptable, and if you have adjusted a few steps, if you find that some adjustment is not appropriate, often because of the time relationship, you are not willing to go back to the original That step is re-adjusted, but it is repaired on the basis of the existing one. In fact, this is the end of the game, not only the original inappropriate place may not be repaired, and may even have an undue influence on the place that did not need to move, so it is very important to analyze the picture before hands-on.
Regarding the calibration, I would like to say a few words. For high-quality manuscripts, it is generally necessary to borrow black and white fields in the case of electricity. This is necessary from the point of view of restoration, but for manuscripts of general quality, especially for manuscripts printed in newspapers (from a news perspective) Most of the business drawings are social and human manuscripts. Compared with high-quality art manuscripts, such manuscripts do not matter, but they are more concerned about how to enhance visual impact, which inevitably leads to adjustment of ideas and methods compared with business. Very different. First of all, it is reflected in the calibration. Because the quality of such manuscripts is uneven, the black and white fields are directly selected in the picture content. The calibration can firstly solve the problem of insufficient color cast and contrast. The white field of individual manuscripts will be biased during automatic calibration and requires manual correction, but in general, the calibration will lay a good foundation for further adjustments below. Everyone is accustomed to using the curve to adjust the picture level. If you do not adjust the standard first, this adjustment will often result in insufficient contrast. Commonly used tools are not limited to curves and color gradations. Skilled use of color balance, hue/saturation, matching colors, replacement colors, and optional colors will greatly improve the quality and efficiency of image processing. For tools related to color adjustment, the user must at least know the relationship between hue, saturation and brightness, the relationship between different color spaces, how to control the super color gamut, etc., and the meaning and adjustment of various parameters in the tool. In the process, the impact on the image data must also have a certain understanding, otherwise blind use will be half the effort.
Finally, I want to talk to you about the use of the USM sharpening tool. I think USM sharpening is actually a subtle level of damage, but it is visually sharper, so the sharpening step should be placed. Finally, after all the content of the image has been processed, it will be sharpened. At the same time, the error of the screen display should also be considered. The screens we use display content in pixels. TIFF and JEPG, which are bitmap formats, are also represented in pixels, so when the screen resolution is not one-to-one or an integral multiple of the image resolution, Display errors will occur, and at this point sharpening, the preview effect we see is also inaccurate. In addition, if the display size of the picture on the screen is close to the actual size, it is helpful to refer to the sharpening effect. Of course, it is also necessary to have a clear understanding of the concept of “quantityâ€, “radius†and “threshold†in the tool and the interrelationship in the sharpening process.
In order to become a qualified image processing staff, it is necessary to master the following aspects: basic printing common sense, basic knowledge of color science and color management, basic printing process of this unit or downstream, PHOTOSHOP about "color Basic understanding of settings, understanding of the characteristics of commonly used tools, data structure characteristics of type pictures, reasonable processing steps combined with specific processing content and corresponding correct data control.
It can be said that all the quality control aspects of lithographic offset printing are based on the transmission of outlets and outlets. If there is no basic understanding of outlet knowledge, at least it is impossible to understand the meaning of data changes on the information panel in PHOTOSHOP. . Without the basic knowledge of color science and color management, the color separation process cannot be accurately controlled; at the same time, the accurate screen display needs to be realized through color management. The “color setting†is closely integrated with the printing process. Without knowing the back-end printing process, the correctness of the color setting cannot be guaranteed, and the correct color separation is even more difficult to talk about. The so-called common tools are not just "brightness / contrast", "levels" and "curves". If you only use these three, I am afraid that the visual effects and work efficiency are not satisfactory, and the data control in key content. It will also get out of control (I personally do not advocate the use of the "brightness / contrast" tool, this tool can not effectively grasp the accuracy of data control). As for the characteristics of each tool, I believe that it should be based on in-depth understanding to achieve strengths and avoid weaknesses and complementary advantages.
I think that should be the basis for doing a good job of image processing. In fact, the process of image processing is not only the process of visual beautification, but also the process of data control. Only the visual beautification based on reasonable data structure is achievable. In layman's terms, it is not printed on the screen. It must be good. After all, all the efforts in the early stage are for the print reproduction of the back end. If the print reproduction is uncontrollable, all your efforts will be half the battle.
Relevant knowledge, screen correction, color separation settings, etc. will also have a special article to introduce to you, this article is limited to the precautions in the image processing process.
The same is the picture processing, the characteristics of business and newspaper industry are very different, let's talk about the business field first.
In commercial applications, high-quality manuscripts and poor manuscripts have different concerns in the process. Generally speaking, the high-quality manuscripts obtained by the handlers have been eclipsed by electric separation and other processes. Some people think that the manuscript of the electricity score must be good, because such manuscripts tend to be good in visual effects, but it should be emphasized that this is a misunderstanding. We must determine whether the data structure of the image is through our own inspection. Reasonable, because the screen display does not fully reflect the real situation of the image data, especially on the gray axis. The quality of a picture does not depend entirely on color and level. Gray balance data and black version structure errors will often give you a fatal blow during the printing process. At that time, the loss of materials will not be said. I am afraid that the time will be irreparable, so the inspection beforehand is very important. In general, the overall contrast of the picture depends on the total amount of ink. The length and thickness of the black version are determined by the content characteristics of the picture. The gray balance data is determined by the back-end printing. If the data deviation is large, do not expect it. Make corrections in PHOTOSHOP and re-energize if necessary. A good manuscript does not need to be adjusted too much. It is nothing more than the optimization of the details. However, the manuscript with good quality or even poor quality will have certain difficulty in handling. At this time, the calibration is very important, without calibration. Manuscripts often do not guarantee overall contrast and color reproduction. Some people are used to scaling in CMYK mode, I think it is not suitable, should be scaled in RBG mode, and then adjust the brightness and contrast of the image after the appropriate adjustment, because the brightness and contrast will be adjusted in CMYK mode It has a very bad influence on the gray balance data.
A good manuscript is faithfully reproduced for business, and for the newspaper industry, any manuscript needs to be re-optimized, nothing more than the difference between the number of steps and the difficulty.
Practically speaking, the characteristics of newspaper production are very time-sensitive, and the production efficiency per unit time is high, and from the scope of adjustment and the extent of change, newspaper pictures are much larger than commercial pictures. In this case, the idea of ​​mapping is even more important. First of all, we must analyze the picture, what is the problem, what is the nature of the problem, what to adjust first, what to adjust later, what tools to use, etc., must think beforehand. The manuscript of the newspaper picture, whether it is the manuscript of the newspaper photojournalist or the Xinhua News Agency or the online picture, is basically RGB, and the newsprint printing network is expanded much larger than the coated paper, and at the same time, to ensure the dark level A large amount of background color removal is used in the four colors, which in turn determines that the image adjustment process basically needs to increase the brightness, and at the same time control the color separation. How to maintain the coordination of brightness and contrast during the adjustment process, how to ensure that the local adjustment does not affect the overall data structure of the picture, how to ensure the saturation and uniformity of color saturation and neutral gray, this is all before the real hands It is necessary to consider clearly, because fundamentally, the adjustment process of the picture is actually a process of continuous loss. For example, the brightness of the center-lighting is improved, the brightness of the surface is more distinct, and the contrast is larger. Sacrificing the level of the dark level, but you think that this sacrifice is acceptable, and if you have adjusted a few steps, if you find that some adjustment is not appropriate, often because of the time relationship, you are not willing to go back to the original That step is re-adjusted, but it is repaired on the basis of the existing one. In fact, this is the end of the game, not only the original inappropriate place may not be repaired, and may even have an undue influence on the place that did not need to move, so it is very important to analyze the picture before hands-on.
Regarding the calibration, I would like to say a few words. For high-quality manuscripts, it is generally necessary to borrow black and white fields in the case of electricity. This is necessary from the point of view of restoration, but for manuscripts of general quality, especially for manuscripts printed in newspapers (from a news perspective) Most of the business drawings are social and human manuscripts. Compared with high-quality art manuscripts, such manuscripts do not matter, but they are more concerned about how to enhance visual impact, which inevitably leads to adjustment of ideas and methods compared with business. Very different. First of all, it is reflected in the calibration. Because the quality of such manuscripts is uneven, the black and white fields are directly selected in the picture content. The calibration can firstly solve the problem of insufficient color cast and contrast. The white field of individual manuscripts will be biased during automatic calibration and requires manual correction, but in general, the calibration will lay a good foundation for further adjustments below. Everyone is accustomed to using the curve to adjust the picture level. If you do not adjust the standard first, this adjustment will often result in insufficient contrast. Commonly used tools are not limited to curves and color gradations. Skilled use of color balance, hue/saturation, matching colors, replacement colors, and optional colors will greatly improve the quality and efficiency of image processing. For tools related to color adjustment, the user must at least know the relationship between hue, saturation and brightness, the relationship between different color spaces, how to control the super color gamut, etc., and the meaning and adjustment of various parameters in the tool. In the process, the impact on the image data must also have a certain understanding, otherwise blind use will be half the effort.
Finally, I want to talk to you about the use of the USM sharpening tool. I think USM sharpening is actually a subtle level of damage, but it is visually sharper, so the sharpening step should be placed. Finally, after all the content of the image has been processed, it will be sharpened. At the same time, the error of the screen display should also be considered. The screens we use display content in pixels. TIFF and JEPG, which are bitmap formats, are also represented in pixels, so when the screen resolution is not one-to-one or an integral multiple of the image resolution, Display errors will occur, and at this point sharpening, the preview effect we see is also inaccurate. In addition, if the display size of the picture on the screen is close to the actual size, it is helpful to refer to the sharpening effect. Of course, it is also necessary to have a clear understanding of the concept of “quantityâ€, “radius†and “threshold†in the tool and the interrelationship in the sharpening process.
Article source address: http://
Introducing our Microfiber Car Glove - the perfect tool for keeping your car looking clean and polished! Made with high-quality microfiber material, this glove is gentle on your car's surface while effectively removing dirt, dust, and grime. Its unique design allows for easy maneuvering around tight spaces and corners, making it a versatile cleaning tool for any car owner. Plus, its durable construction means it can be used again and again, making it a cost-effective choice for keeping your car looking its best. Say goodbye to messy car interiors and hello to a shiny, spotless ride with our Microfiber Car Glove!
microfiber car cleaning mitt,best micorifber washing glove,microfiber gloves for car,car wash microfiber mitt manufacturer
jiangsu qiyun cleaning knitting product co.,ltd , https://www.jarfrry.com