Understanding Adobe Photoshop CS4- P12

Understanding Adobe Photoshop CS4- P12: Learning Adobe Photoshop is essential to success in digital media industries.Photoshop is a gateway into several related technologies. From digital image acquisitionand processing to typography and compositing, Photoshop is often your fi rstintroduction. If you can master this program, you can go on to success with severalother technologies. With this in mind, it is important to learn Photoshop with oneeye on the present and the other on the future.
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Understanding Adobe Photoshop CS4- P12318 Chapter 16 Printing, PDF, and Specialized Output because the fi le can be stored at print resolution with embedded vector fi les and high-quality output options. Compression Options for Adobe PDF When you choose to save artwork as a Photoshop PDF, you are presented with the Save Adobe PDF dialog box. You can choose to compress text and line art as well as down- sample bitmap images. Depending on the chosen settings, you can significantly reduce the size of a PDF fi le with little or no loss of detail. Let’s open the Save Adobe PDF dialog box. 1. Open the image Ch16_Parrots.tif from the Chapter 16 folder. 2. Choose File > Save As. 3. From the Format drop-down menu choose Photoshop PDF. 4. Target the Desktop for saving, and then click Save to open the Save Adobe PDF dialog box. 5. A warning dialog box opens to caution you that the settings you choose in the Save Adobe PDF dialog box will override settings in the Save As dialog box. Click OK to dis- miss the warning. 6. In the Save Adobe PDF dialog box, you can choose an Adobe PDF Preset. This is a fast way to specify that the newly generated PDF fi le is intended for commercial printing or to be distributed via email. You can also choose to Preserve Photoshop Editing Capabilities to save layers and text editability for future changes. At this point, you can click Save PDF to generate the fi le right away or keep modifying the settings for special purposes. PDF Essentials 319 ADOBE PDF STANDARDS You can choose to create a PDF that matches the most widely used standards for print publishing. There are three different types of PDF/X formats: • PDF/X-1a (2001 and 2003): PDF/X-1a is an industry-recognized standard for graphic exchange. Choosing PDF/X-1a requires all fonts to be embedded and for the appropriate PDF bounding boxes to be specified. PDF/X-compliant files must contain necessary information describing the condition for which they were pre- pared to be printed. PDF/X-1a compliant files can be opened in Acrobat 4.0 and Acrobat Reader 4.0 and later. • PDF/X-3 (2002 and 2003): The main difference in this newer version of PDF is that it allows for the use of color management. Additionally, it supports device-independent color as well as CMYK and spot colors. Also, ICC color profiles can be used to specify color data later on in the workflow. PDF/X-3 compliant files can be opened in Acrobat 4.0 and Acrobat Reader 4.0 and later. • PDF/X-4 (2008): The newest format of PDF is designed to support newer features like printing artwork with live transparency and layers. This format is designed to work within the existing Adobe PDF Print Engine. The major benefit is that PDF/X-4 jobs can print without flattening artwork or converting the file to PostScript. For more information on PDF/X, see www.adobe.com/designcenter/creativesuite/articles/cs3ip_pdfx.pdf.CompressionThe Compression area of the Save Adobe PDFdialog box offers several options for reducingfi le size. You do not need to downsample, butyou might want to if you want to better matchthe output resolution of a particular printer or toreduce fi le transfer times.The chosen interpolation method determineshow pixels are deleted:• Average Downsampling: This method averages the pixels in a sample area and replaces the entire area with the average pixel color.• Subsampling: This method chooses a pixel in the center of a sample area and replaces the entire area with that color.• Bicubic Downsampling: This method uses a weighted aver- age to determine pixel color. It generally yields better results than Average Downsampling. This is the slowest but most ac- curate method.320 Chapter 16 Printing, PDF, and Specialized Output The Compression setting offers three compression methods: • ZIP: This works well for images with large areas of single col- ors or repeating patterns. • JPEG: This is suitable for ...