Analysis of common problems in image processing before film output
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In computer typesetting, the output of film (including laser printer output sulfuric acid paper) must be performed. Since there are many types of graphic processing and typesetting software, distribution software, and fonts, the layout of different typesetting methods and fonts is different. Although various software such as graphic processing and typesetting have good compatibility, it is not completely problem-free. Due to a variety of factors, there are sometimes problems such as word loss, text misplacement, garbled characters, and image distortion in the hairline. This requires the production and output operators to be familiar with the commonly used software to master the characteristics of each hair row in the production and Pay attention when outputting.
1. At present, in addition to the common Founder system, Word and other software, some graphic processing and typesetting software can not boldly process the text, because it will cause the ghost of the text (Chinese) edge to affect the clarity of the text output. Therefore, it is best not to bold the text when using these softwares. If you need bold characters, you can use fonts with thicker lines.
In addition, there are many fonts in the computer, such as the PS word TureType word Bitmap word, etc. In the graphic processing and typesetting software, there are also a variety of fonts to choose from. The fonts are also very rich. However, when selecting a font, you must pay attention to the fonts that have been installed on the output device such as the photo machine. If it is not installed, you can download it from the network before the release, and then install it correctly. For example, when using the TureType font that is not installed in the imagesetter, the font is downloaded from the network, but the OS8.5 and OS8.6 systems have problems with the downloading process, and sometimes there is a problem of throwing strokes. Therefore, after downloading, you can output large sample and small amount of film for trial use, and then send it in large quantities without any mistakes to avoid wasting material and time. In addition, there are differences between the fonts of different fonts and they are not fully compatible. Therefore, it is necessary to distinguish between different hairline characteristics. Meet different output condition fonts. However, in a system, you should select a common font as the default font of the system. Unless you need to open it at the same time for different fonts, don't open multiple fonts at the same time, so as to avoid font errors when outputting.
For font types and different types of different types can not be mixed as much as possible to install the relevant fonts that can be used to save output space. Be careful not to load the word through the server but if necessary, the server font (slow). When the font is replaced, it should be re-selected directly if it is confirmed. Otherwise, the text and punctuation will cause a shift when the font is reset. It is best not to use text effects for very small texts, such as italic, hollow, and lower lines. Because the font attributes and default options of different computers are different, such as when the files are converted to each other, the default kerning of the PC should be converted to the normal kerning of the Mac to avoid errors. Different versions of Chinese version, Chinese version, and English version have different support procedures for double-byte Chinese, so pay special attention when issuing. The same word, the difference between different versions will cause the output to be different from the print. For example, the punctuation marks in the new and old models of Hanyi have a square. The old font number can't be done one by one, which will cause garbled misplacement during download. Inline punctuation can cause problems in some systems, and you must use the location code to enter special symbols to solve. When inputting Chinese and English, or when mixing Chinese and English, it is best to use Chinese and English input methods and Chinese and English fonts separately, otherwise it is easy to make English characters in Chinese.
In addition, when using the more popular PC platform typesetting software, it is necessary to avoid using the downloaded fonts for output, because the software (especially the pirated software) itself is not perfect enough. It often appears garbled when using the downloaded fonts. malfunction. The same font can be installed on both the PC platform and RIP, and you should try it out when you send it. For the word layout software that is currently used very frequently. When outputting a page made using Word software on a PC platform, be careful to set the page as a monochrome page, because the color pages produced by Word software are all RGB mode, and the output is generally CMYK mode, so the output often appears. Some problems, even in the RIP color separation often occurs errors.
2. Because the embossing function is sometimes used in graphic processing, some software also has these functions. Such as the black version of Pagemaker will be automatically imprinted. However, some color blocks and lines need to be made by themselves: Freehand, Illustrator and other software need to set the black version of the imprint.
therefore. Check the imprint function before issuing. For other colors to be embossed in the software, you need to set it at the time of production.
However, be careful not to emboss when you want to check the gray when setting the black plate imprint. For pages made with Illustrator software, because the direct release speed is slower, and sometimes the page size will change, you can save it as an EPS file and put it into Pagemaker. However, it should be noted that Pagemaker has no embossing effect, so you should not choose this method in a uniform way, but choose the way of sending according to the specific conditions of the page.
3. Nowadays, some typesetting software has the functions of rotating, cutting, and zooming the image. However, because the image is rotated in the typesetting software, not only the memory is occupied, but also the calculation amount at the time of the hairline is increased, so that the time of the distribution is increased. therefore. Images are best not to be rotated, cropped, or scaled in the typesetting software. In addition, the image display in the typesetting software is rough cropping, reducing the image inaccuracy and the method of cutting and reducing does not reduce the amount of information of the image, and can not shorten the time of sending and discharging: magnifying the image in the typesetting software will affect the image quality . Therefore, the rotation, cropping, and scaling of the finished image are preferably performed in the scanning and image processing software. In addition, it should be noted that in the layout process of individual typesetting software (especially in Chinese and English), it is not possible to use the same line and mandatory, because the functions of these typesetting software are not all such that when the page is forced to be displayed, the page is displayed on the screen. But the result of the actual output is another matter.
4. In the storage of images, there are currently a variety of formats, each with its own characteristics. Choose a storage format based on your situation and avoid errors. For example, the commonly used TIFF image storage format has a large amount of information stored, and some RIPs may generate errors when processing the TIFF image with a large amount of information in the imposition software. Therefore, the image with a large amount of information is preferably stored in the EPS format. Put it in the row again. In addition, some RIP will have a very obvious jump when dealing with the 0-100% gradient from the Pagemaker 6.5 software. At this time, you can use the method of adding noise in the gradient image in Photoshop to solve this problem.