Sử dụng photoshop cs5 part 2 pdf

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Sử dụng photoshop cs5 part 2 pdf

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ptg 10 Chapter 1 North America. e default RGB color space that is assigned to this setting is Adobe RGB. When CMYK documents are opened, their values are preserved. North America Web/Internet is designed for online output. All RGB images are converted to the sRGB color space. 3. e Working Spaces settings control how RGB and CMYK colors are treated in a document that lacks an embedded prole. You can either leave these settings as they are or choose other options (the RGB options are discussed below). For the CMYK setting, ask your output service provider which working space to choose. We recommend choosing one of these RGB color spaces, depending on your output needs: Monitor RGB [current display prole] sets the RGB working space to your display prole, and is useful if you know that other applications you’ll be using for your project don’t support color management. Keep in mind, however, that if you share les that use your monitor prole (as the color space) with another user, their monitor prole will be substituted for the RGB working space, and this may undermine the color consistency that you’re aiming for. ColorSync RGB (Mac OS only) matches the Photoshop RGB space to the space that’s specied in the Apple ColorSync Utility. If you share this conguration with another user, it will use the ColorSync space that’s specied in their system. Adobe RGB 1998 contains a wide range of colors and is useful when converting RGB images to CMYK. You may have gotten our drift by now that this option is recommended for print output but not for online output. ProPhoto RGB contains a very wide range of colors and is useful for output to high-end inkjet and dye sublimation printers. sRGB IEC619662.1 is a good choice for Web output, as it reects the settings on the average computer display. Many hardware and software manufacturers use this as the default space for scanners, low-end printers, and software. 4. Click OK. Continuing with our recommended steps for color management, you’ll use the Color Settings dialog to set the color space for Photoshop. If you want to get up and running quickly by establishing Adobe RGB as the color space without wading through all the options in the Color Settings dialog, you can make one simple preset choice by following the rst set of instructions below — that is, if you use the program primarily to produce images for print output on a commercial or color inkjet printer and you’ve followed our instructions for color manage- ment thus far. To choose a color settings preset: 1. Choose Edit > Color Settings (Ctrl-Shift-K/ Cmd-Shift-K). e Color Settings dialog opens ( A , next page). 2. Choose Settings: North America Prepress 2 (readers residing outside North America, choose an equivalent for your output device and geographic location). is preset changes the RGB working space to Adobe RGB (1998), and sets all the color management policies to the safe choice of Preserve Embedded Proles so each le you open in Photoshop will keep its own prole. 3. Click OK. If you want to explore the Color Settings dialog in more depth, follow these instructions instead. Pick and choose among the options, depending on your output requirements. To choose color settings options: 1. Choose Edit > Color Settings (Ctrl-Shift-K/ Cmd-Shift-K). e Color Settings dialog opens ( A , next page). 2. From the Settings menu, choose one of these presets, depending on your output needs: Monitor Color sets the RGB working space to your display prole. is is a good choice for video output, but not for print output. North America General Purpose 2 meets the requirements for screen and print output in North America. All prole warnings are o. North America Newspaper manages color for output on newsprint paper stock. North America Prepress 2 manages color to conform with common press conditions in Choosing a color space for Photoshop ptg Color Management 11 DOCUMENT-SPECIFIC COLOR Photoshop supports document-specifi c color, meaning that each document keeps its own color profi le. The profi le controls how colors in the fi le are previewed onscreen, edited, and converted on output. For documents that lack an embedded profi le, Photoshop generates a preview using the current working space. ➤ e Adobe RGB (1998) color space, which is recommended for print output, includes more colors in the printable CMYK gamut than the sRGB IEC61966-2.1 color space, which is designed for online output. Although sRGB IEC61966-2.1 is the default listing on the Working Spaces: RGB menu in the Color Settings dialog, it can spell disaster for print output. A We chose North America Prepress 2 from the Settings menu in the Color Settings dialog.  e D e s c r i p t i o n a r e a provides information about whichever Color Settings option the pointer is currently hovering over. ptg 12 Chapter 1 Before synchronizing the color settings via Bridge, make sure you’ve chosen the proper settings in Photoshop (see the preceding two pages). To synchronize the color settings among Creative Suite applications using Bridge: 1. On the Application bar in Photoshop, click the Launch Bridge button. 2. In Bridge, choose Edit > Creative Suite Color Settings (Ctrl-Shift-K/Cmd-Shift-K). e Suite Color Settings dialog opens. A 3. Click the same settings preset you chose in the Color Settings dialog in Photoshop, then click Apply. Bridge will change (synchronize) the color settings of the other Adobe Creative Suite applications to conform to the selected preset. Synchronizing color settings If the color settings in another Adobe Creative Suite program that you have installed on your system (such as Illustrator or InDesign) don’t match the settings in Photoshop, an alert will dis- play at the top of the Color Settings dialog (as in A , next page). If you haven’t installed one of the full Adobe Creative Suites, you’ll have to start up the errant application and x its color settings by hand. If you do have a suite installed, you can use the Suite Color Settings dialog in Bridge to synchronize the color settings for all of the color- managed Adobe programs on your system. A Use the Suite Color Settings dialog to synchronize the color settings of all the applications in the Adobe Creative Suite that you have installed on your system. MATCHING THE SETTINGS The presets in the Suite Color Settings dialog are the same as on the Settings menu in the Color Settings dialog (see page 10). Keep Show Expanded List of Color Settings Files unchecked to display just the fi ve basic presets. ptg Color Management 13 Customizing your color policies e current color management policies govern whether Photoshop honors or overrides a docu- ment’s settings if the color prole in the le, when opened or imported, doesn’t conform to the current color settings in Photoshop. If you chose the North America Prepress 2 setting in the Color Settings dialog (page 10), the Ask When Opening policy (the safest option, in our opinion) is already chosen for you, and you can skip these instructions. To customize the color management policies for Photoshop: 1. Choose Edit > Color Settings (Ctrl-Shift-K/ Cmd-Shift-K). e Color Settings dialog opens. A 2. From the Color Management Policies menus, choose an option for les that are to be opened or imported into Photoshop: Off to prevent Photoshop from color-managing the les. Preserve Embedded Profiles if you expect to work with both color-managed and non-color- managed documents, and you want each le to keep its own prole. Convert to Working RGB or Convert to Working CMYK to have all documents that you open or import into Photoshop adopt the program’s current color working space. is is usually the best choice for Web output. 3. Do any of the following optional steps: For Profile Mismatches, if you check Ask When Opening, Photoshop will display an alert if the color prole in a le you’re opening doesn’t match the current working space. Via the alert, you will be able to override the current color management policy for each le. Check Ask When Pasting to have Photo shop display an alert if it encounters a color prole mismatch when you paste or drag and drop color imagery into a document. e alert lets you override your color management policy when pasting. For les with Missing Profiles, check Ask When Opening to have Photoshop display an alert oering an option to assign a prole. 4. Click OK. A Choose Color Management Policies options from this area of the Color Settings dialog. Because we chose some non- default options from the menus, “Custom” appears on the Settings menu — but more important, the color settings are no longer syn- chronized among the Adobe Creative Suite applications that are installed on our system. ptg 14 Chapter 1 Saving custom color settings For desktop color printing, we recommended choosing North America Prepress 2 as the color setting for Photoshop (see page 10). For commer- cial printing, let the pros supply the proper color settings: Ask your print shop to send you a .csf le with all the correct Working Spaces and Color Management Policies settings for their particu- lar press. en all you’ll need to do is install that custom color settings le in the proper location by following the instructions below and, when needed, choose it from the Settings menu in the Color Settings dialog. To save custom color settings as defaults for the Creative Suite: 1. In Windows, put the le in Program Files\ Common Files\ Adobe \Color\Settings. In the Mac OS, put the le in Users/[user name]/Library/Application Support/ Adobe/ Color/Settings. 2. To access the newly saved settings le, open the Color Settings dialog, then choose the name of the .csf le from the Settings menu. If your print shop gives you a list of recommended settings for the Color Settings dialog — but not an actual .csf le — you can choose and then save that collection of settings as a .csf le by following these instructions. To save custom color settings: 1. Choose Edit > Color Settings (Ctrl-Shift-K/ Cmd-Shift-K). e Color Settings dialog opens. 2. Enter the required settings by choosing and checking the appropriate options. 3. Click Save and enter a le name (we recom- mend including the printer type in the name), keep the .csf extension and the default loca- tion, then click Save. 4. Click OK to exit the Color Settings dialog. Acquiring printer profiles  u s f a r , w e ’ v e s h o w n y o u h o w t o s e t y o u r c a m e r a to the Adobe RGB color space, calibrate your dis- play, and specify Adobe RGB as the color space for Photoshop. Next you’ll learn how to acquire the proper printer prole(s) so you can incorporate color management into your specic printing scenario. To download the printer profile for an inkjet printer: Most printer manufacturers have a website from which you can download either an ICC prole for a specic printer/paper combination or a printer driver that contains a collection of specic ICC printer/paper proles. Be sure to choose a prole that conforms to the particular printer/paper com- bination you will be using. 1. On the following page, we step you through a few pages on the websites for two manufactur- ers of widely used printers: Epson, focusing on the Stylus Photo R series (Epson.com) ( A–C , next page) and Canon (Canon.com) ( D–F , next page). Another option is to also download an ICC prole for a specic printer/paper combo from the website for a paper manufacturer, such as ilford.com or crane.com/museo. Note: e proles for the newest printer models may not be available yet on these sites. Check back periodically. 2. After visiting the website, install the prole you downloaded by following the instructions that accompany it. On pages 404–405, we’ll show you how to use the prole to soft-proof a document onscreen. ptg Color Management 15 C On the page for the printer model, below Drivers & Downloads, click the link for your operating system. On the Drivers & Downloads page (shown above), click the link for Premium ICC Proles for [printer name]. On the Premium ICC Printer Proles page (not shown), click the prole for your chosen paper type. F On the Drivers & Downloads page, select your operating system, then click the correct printer driver. e driver will install the proles automatically. E From the menus, choose the Printers category, product type (printer series), and printer model, then click Go. B Click Ink Jet under Printers, then click your printer model on the list of printers. FINDING A PROFILE FOR AN EPSON STYLUS PRINTER, PHOTO R SERIES FINDING A PROFILE FOR A CANON INKJET PRINTER D On the Canon.com home page for your region, choose Downloads > Consumer. A On the Epson.com home page for your region, choose Drivers & Support > Printers. ptg 16 Chapter 1 Changing color profiles When a le’s prole doesn’t conform to the cur- rent working space (Adobe RGB, in our case) or the color prole is missing altogether, you can use the Assign Prole command to assign the correct one. You may notice visible color shifts if the color data of the le is reinterpreted to conform to the new prole, but rest assured, the color data in the actual image is preserved. Do keep Preview checked, though, so you can see what you’re getting into. To change or remove a file’s color profile: 1. With a le open in Photoshop, choose Edit > Assign Profile. If the le contains layers, an alert may appear, warning you that the appear- ance of the layers may change; click OK. e Assign Prole dialog opens. A 2. Check Preview, then click one of the following: To remove the color prole, click Don’t Color Manage is Document. To assign your current working space to the  l e , c l i c k Working [document color mode and the name of your chosen working space]. If you followed our instructions for color management, you’ve already specied Adobe RGB as the Working RGB space, but you can click this option for any photo that wasn’t shot or scanned using that color space. To assign a dierent prole, click Profile, then choose a prole that diers from your current working space. 3. Click OK. WHERE A DOCUMENT’S PROFILE IS LISTED ➤ If Document Profi le is chosen from the Status bar menu at the bottom of the application frame, the current profi le will be listed on the bar. ➤ In the File > Save As dialog, if you save a fi l e i n a f o r m a t t h a t s u p p o r t s e m b e d d e d p r o fi l e s , such as Photoshop (PSD) or Photoshop PDF, you can check ICC Profi le… (Windows)/Embed Color Profi le… (Mac OS) to embed the profi le with the fi l e — i f o n e h a s b e e n a s s i g n e d . ➤ In the File > Print dialog, the profi le name appears in the upper right, under “Document.” B Use the Convert to Prole dialog to convert your document to a dierent color prole. Here, we’re switching from the Adobe RGB prole to our working CMYK prole for a stan- dard web press that uses coated paper. A Use the Assign Prole dialog to either remove a color prole or assign a dierent one. e Convert to Prole command lets you preview the conversion of a document to an assortment of output proles and intents, and then converts the color data to the chosen prole. Note: is com- mand performs a mode conversion and changes the actual color data in your le! To convert a file’s color profile: 1. Choose Edit > Convert to Profile. In the Convert to Prole dialog, B check Preview. 2. Under Destina tion Space, from the Profile menu, choose the prole you want to convert the le to (it doesn’t necessarily have to be the current working space). 3. Under Conversion Options, choose an Intent (for the intents, see the sidebar on page 405). 4. Leave the default Engine as Adobe (ACE) and keep Use Black Point Compensation and Use Dither checked. 5. Optional: Check Flatten Image to Preserve Appearance to merge all layers and adjustment layers in the document. 6. Click OK. . stock. North America Prepress 2 manages color to conform with common press conditions in Choosing a color space for Photoshop ptg Color Management 11 DOCUMENT-SPECIFIC COLOR Photoshop supports document-specifi. n a f o r m a t t h a t s u p p o r t s e m b e d d e d p r o fi l e s , such as Photoshop (PSD) or Photoshop PDF, you can check ICC Profi le… (Windows)/Embed Color Profi le… (Mac OS) to embed. colors in the printable CMYK gamut than the sRGB IEC61966 -2. 1 color space, which is designed for online output. Although sRGB IEC61966 -2. 1 is the default listing on the Working Spaces: RGB menu

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