The third problem of image output

Third, the headache picture

Following the font problem, the biggest problem with the output center is the picture. It has been estimated that the output center will make more or less corrections to the pictures in all the files sent before the output file, which has become the norm in the center.

The most obvious problem is that customers often do not include pictures in files. The customer can put the linked picture in the typesetting software, but when sent to the output center, he forgets to send the picture placed in the file to the output center together. Therefore, when the output, it is not reported that the picture is wrong, that is to get a Low resolution pictures. Sometimes customers do not link pictures at all. For example, documents produced by financial companies, the pictures in these files are often copied from Microsoft PowerPoint or Excel to a file, when the layout file contains only one WMF file. When the picture is processed in the output, it is not the line width error, which is the color cast.

So, recreate the illustration in Adobe Illustrator or some other suitable illustration software. Do not put it into Illustrator by grabbing or cutting and scraping. The best way to do this is to hook it first and then export it as an EPS file. Put into Illustrator.

The WMF file is not the only file format that cannot be interpreted by Postscript RIP. In addition, LZW compressed TIFF format files, especially when the format of the image in the publishing software has been indented, RIP interpretation problems. Because RIP must first decompress the image and rescale the image at the new size, the file will always be printed or not printed at all. Therefore, images must be stored in uncompressed CMYK TIFF or EPS format.

Some problems should be paid attention to when outputting with the QuarkXPress layout software. Because XPress can easily rotate, mirror, and invert the image, Xpress can easily rotate, mirror, and invert the image. Therefore, the production staff often In Photoshop, the image is not processed in this area. Instead, all these tasks are handed over to the Xpress software. This means that the RIP must also do the corresponding processing. Inverted, rotated, and mirrored images have a large amount of work for RIP and cause serious crashes. Therefore, if the image is to be rotated, mirrored, inverted, etc., it is best to do these tasks in Photoshop and then put it into place.

When the file is finalized, unnecessary paths created in Photoshop must be deleted. Because if you leave unnecessary paths in the image, RIP is awkward.

With the popularity of web pages, the output center has encountered more and more problems when processing pictures. Many customers often put files in the 72dpi GIF format RGB index images they downloaded from the Internet. This type of image looks good on the screen, and inkjet printing is also good, but these images often do not separate. Even if they were converted to CMYK TIFF images, the resolution was not enough. If you reduce the image to improve the resolution, the quality of the output may not be acceptable. Although reducing the size of the image can help increase the resolution, it can affect the color and sharpness of the image.

On the other hand, some customers have improved the image segmentation in Photoshop. This is forced to increase the pixels of the image. These pixels are not present in the original image, and the interpolated pixels are only at the expense of reducing the image contrast. The only way to guarantee a high-quality image is to scan or acquire the image in the final output size and resolution.