Artistic Image Processing Technology (I)

Prepress image processing technology is really important, it is the first pass of printing and copying, and it is the foundation and key to the quality of printed images. If the image processing is not good, the best printability also can not print a good product. .

Practice has proved that whether the use of photocopying technology, or the application of CTP technology, whether it is traditional printing or digital printing, the front end still has to scan the color separation and processing of analog manuscripts, digital camera images, still need to carry out color space conversion and processing. The image processing at the front end is also a variable factor. It is necessary to adjust the manuscripts of all kinds of characteristics with various characteristics to the range of various print suitability, and to carry out art processing, which should be reproduced on the print screen. Artistic effect. Therefore, it is the most important task to establish a color management and quality control system with its own characteristics.

The third step in color management is to perform meticulous post-processing and art processing on the basis of excellent and advanced color management and on the basis of standardization of scans. Post-processing and processing refers to the standardization of scans. The use of various functions of Photoshop image processing software to perform technical processing and artistic processing on non-compliant manuscripts, customer color requirements, and styles and characteristics of art class manuscripts to achieve better than manuscripts and satisfy customer's requirements for color. And reproduce the artist's work style and characteristics.

Practice has proved that, in addition to high-quality manuscripts and high-grade printability, high-quality image processing technology is required to produce fine images. Fine technical processing and high-level art processing are required. This is also the printing industry in China. The essence of what is missing. Without high-precision technical processing and high-level artistic processing, it is difficult to print out fine-grained images. At present, many high-grade fine prints are called "printed artworks", which all reflect the perfect combination of art and high technology.

The guiding ideology of color management advocated and practiced by the writer is: printing and copying is a special technique of technology plus art. Print is a product that directly provides people with information, spreads culture, and is preserved for a long time for people to enjoy. It cannot be just a simple operation technique. . In particular, today's printed matter often exceeds the level of single-layered practical industrial products and becomes a crystalline product of information and art. This is because the method of color printing and copying is carried out in accordance with industrial production methods. This not only embodies the scientificity and strictness of the application of color laws in the prepress and printing processes, but also the art of color laws and processes. Beauty's creativity. Whether or not the artistic effect is achieved on the printed matter screen is the key to the success or failure of printing, and it is also an important measure of the quality of printed matter. Therefore, pre-press image processing must make full use of high-tech means and combine fine technical processing with superb artistic processing to produce excellent images.

The author has realized that the comprehensiveness of the printing art has three levels, one is the synthesis of various arts; the second is the synthesis of science and art; the third is the synthesis of aesthetics. To reproduce the desired artistic effect on the print screen lies in the integration of these three levels, which is to combine the artist's personal style, characteristics, and the connotation of the works in the operation of image processing technology. Never use prepress image processing technology as a simple operating technique.

A leader of the publishing industry pointed out that more than 50% of the aesthetic power of an album or a magazine is guaranteed by printing links before printing. It must not be a craftsman who has no ideas, no emotion, no color, no creativity. Attitude to engage in this production. A beautiful painting work, photography, we must first analyze its theme; tone characteristics, anatomy of its details, level, color ratio, charm, etc., that is to achieve eye height; and then use advanced color management technology and image processing The various functions of the software perform technical processing and artistic processing, that is, to achieve high hand. In order to reproduce fidelity in publications, this is the fundamental difference between print artists and printers. Poor prints only serve to negatively affect the reader's aesthetic instincts.

The printing in the high-tech era is the bridge between the artist's personal creation and the public, and the printing of fine art books. We should be rigorous and pragmatic in our work style, strive to perfect the spirit of research, and improve the processing and meticulous quality control and color management. It expresses respect and respect for the artist's creative work achievements, so that the artist's works can be disseminated to the public with high fidelity and high quality through our labor.

The famous calligraphy artist Wang Ziwu said: "A good printing crystal is a kind of respect and protection for the artist's efforts." This is a high degree of respect for and expectations of the printer's character and technology.

The author summarizes the following four aspects of late-stage technology processing and art processing:

1. Processing of color separation and digital manuscripts

First of all, the scanning color separation and digital manuscript of the analog manuscript shall be checked according to the parameters of the four basic standards of print reproduction (gray balance, tone level, color correction, sharpness enhancement), and whether the printability of the product is met. And the original content characteristics, some compensation for some of the error adjustment, so that all parameters more accurate and better reducibility.

2. Processing of non-compliant manuscripts

There are many non-compliant manuscripts at present, and the amount of processing required is large and complicated. The main ones are: (1) The processing of the original document due to underexposure or overexposure resulting in a dark or bright color density. 2 The original image is color-matched and the color is dark due to improper shooting and washing: old and insufficient saturation processing. 3 The processing of the Chinese manuscripts, oil paintings, and other secondary manuscripts. 4 The processing of defects such as rough particles, flaws, tracks, and dirty spots on the original document is superior to the manuscript and customer satisfaction through processing.

3. Compensation processing for non-linear transfer of printing process tone

Because the network tone adjustment is limited by various conditions during the process of printing and printing, the transmission of the tone network is non-linear. In order to adapt to the printing process, compensation adjustment processing must be performed. For example, high-gloss small outlets are easy to lose, which can affect the high light-toned color levels and require deeper processing. The printing of 50% outlets is easy to increase, which will affect the level of the middle tone and need to be lightened. The printing of 80% dot area is easy to merge with the dark tone, which will affect the dark skin tone and the ratio of the deep primary colors. It should be done to avoid the processing of the 80% dot jump zone. Through the adjustment process, so that it is consistent with the law of the printing process.