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Color management workflow in Adobe After Effects CS4

box and assign the HDTV (Rec. 709) 16-235 profile to your footage in the Interpret Footage

dialog box. Color values will be preserved because the profile assigned to your footage in the

Interpret Footage dialog box is the same as the profile set for the project’s working space.

However, 16 RGB will be mapped to the darkest black on you monitor and 235 mapped to the

lightest white on your monitor, creating the impression of a full-range image on your moni-

tor. Keep in mind that some blending modes and effects expect black to be at a value of 0.

Unexpected results may appear when black is not set at 0.

Note:

You can maintain footage values by using the full-range HDTV (Rec. 709) profile for inter-

preting footage, for the project working space, and for the output profile. However, if your footage

is within the limited range of 16-235 and you use the HDTV (Rec. 709) profile as the project

working space, then images will appear to have less dynamic range and contrast.

3 Compress luma levels on output:

Choose one of the “16-235” profiles in the Color Management tab of the Output Module

Settings dialog box. These profiles will insure that the luma levels in your rendered file will be

within the 16-235 range. If your project working space was full-range (0-255), then color values

will be compressed into the limited 16-235 range on output.
If your project working space was one of the “16-235” profiles, there will be no luminance com-

pression on output, but the final output will be within the limited 16-235 range.

YCbCr

RGB

(After Effects

project)

Y=16

Y=235

super black

overbrights

RGB=0

RGB=255

Y=255

Y=0

Figure 3 — Luma compression for video output

Содержание 65008009 - After Effects CS4

Страница 1: ...ofiles in After Effects Help for now you simply need to know that profiles give the CMS the data needed to maintain color appearance when color values are sent to a device For example if the color represented by the num bers R235 G56 and B70 captured by a digital camera is tomato red but appears closer to brick red on a monitor the CMS can translate the RGB numbers to those needed by the monitor t...

Страница 2: ...other Adobe Creative Suite components in your workflow you will be able to view color consistently across these applications Both Photoshop and Adobe Illustrator will use ICC profiles embedded in your files Currently Adobe Premiere Pro does not support color management Simulate different output conditions without altering color values in your project You may be working on a project that will be de...

Страница 3: ...ed in the import composite output pipeline This has an advantage of maintaining consistency between footage you are compositing in After Effects and footage that may not be color managed in other parts of your workflow However colors are converted when sent to your computer monitor in order to view the HDTV Rec 709 color space accu rately It is normal in video production to use a reference video m...

Страница 4: ... producer of the footage originally intended In other cases footage will not have an ICC profile embedded QuickTime video files and GIF still images are examples of this type of footage In this case you can assign an ICC profile in the Interpret Footage dialog box and bring that footage into the After Effects project for accurate color viewing and compositing 1 Choose File Import File and select t...

Страница 5: ...ault color settings file in Photoshop North America General Purpose 2 enables Photoshop to automatically use embedded ICC profiles If the file you re editing does not have an embedded profile Photoshop uses the default sRGB IEC 61966 2 1 ICC profile to define the color appear ance of the RGB values This profile is an acceptable profile to use for HD TV work as it repre sents the color appearance o...

Страница 6: ...atches the project working space Choose the HDTV Rec 709 profile instead of the default Working Space HDTV Rec 709 to ensure that if you change the project working space at some point not a recom mended practice the profile in the Output Module will not change as well However if you wish to maintain color values when outputting then the Working Space HDTV Rec 709 profile is a good choice This choi...

Страница 7: ...t and printed to commonly used print stocks for theatrical distribution Workflow overview This workflow takes you through the following steps 1 Setting up the After Effects CS4 project 2 Importing footage and graphics 3 Simulating output for theater projection 4 Optional Editing images in Photoshop CS4 5 Outputting files 6 Using the Color Profile Converter effect Interpret Footage film scans Cineo...

Страница 8: ...t you import will have embedded ICC color profiles Examples of this case may be film sequences encoded in the TIFF format In these cases you can import the footage confident that you will see colors as the producer of the footage origi nally intended In other cases footage will not have an embedded ICC profile In these cases you can assign an ICC profile in the Interpret Footage dialog box to defi...

Страница 9: ...s preset reinter prets DPX values as color that would be shown after film out on an ARRI recorder to Kodak intermediate stock 5242 which is then printed onto Kodak 2383 print stock in a Bell Howell Model C film printer and projected in a theater with a xenon light source Once you have selected Universal Camera Film to Kodak 2383 from the Simulate Output menu After Effects uses this setting to adju...

Страница 10: ... color appearance as you switch between After Effects CS4 and Photoshop CS4 Follow these steps to preserve consistent appearance in After Effects CS4 and Photoshop CS4 Note If you have not selected a Color Settings file in Photoshop choose Edit Color Settings Select North America General Purpose 2 from the Settings menu this setting is the default so it should be selected already This Color Settin...

Страница 11: ...r as they will when printed back to camera negative film stock If you wish to save this proofing condition for later use you can do so by clicking Save naming the proof condition and saving it to disk This Proof Settings PSF file will then be accessible to you in Photoshop s View Proof Setup menu for later use 4 After making your edits in Photoshop save and close the file For 8 bpc or 16 bpc raste...

Страница 12: ...ofile menu For Cineon output Choose the Universal Camera Film Printing Density ICC profile This will be the default This will leave color values unchanged on output Figure 10 Output Module Settings dialog box Cineon For HD video dailies Choose the HDTV Rec 709 ICC profile in the Output Profile menu in the Color Management tab of the Output Module Settings dialog box For HD video dailies use the Co...

Страница 13: ...ayer to the composition you have been working with Apply the Color Profile Converter effect to the new adjustment layer In the Color Profile Converter effect choose these settings Input Profile Project Working Space Output Profile Universal Camera Film Printing Density Rendering Intent Absolute Colorimetric 2 Apply another instance of the Color Profile Converter effect to the new adjustment layer ...

Страница 14: ...can accurately view sRGB IEC61966 2 1 colors to ensure that colors are correctly rendered using the sRGB IEC61966 2 1 color space Workflow overview This workflow takes you through the following steps 1 Setting up the After Effects project 2 Importing footage including still graphics 3 Optional Editing graphics in Photoshop CS4 4 Optional Simulating output for more accurate viewing 5 Outputting fil...

Страница 15: ...ort and work with raster images or vector graphics from other sources In some cases files that you import will have embedded ICC profiles examples of this case may be still images created or edited using Photoshop In these cases you can import the graphics confident that you will see colors as the producer of the graphics originally intended In other cases graphics will not have an ICC profile emb...

Страница 16: ...nges to the image Select the Embed Color Profile option in the Save dialog box if you are working with file formats that support embedded ICC profiles such as TIFF PSD or JPEG Figure 4 Photoshop Save dialog box with Embed Color Profile option selected Step 4 Optional Simulate final output In some cases you may want to create a Flash animation project and output to different types of display techno...

Страница 17: ...ur own Turning this monitor compensation off does allow you to view colors as they would appear on your monitor using most web browsers and other non color managed applications Once you have selected one of the Simulate Output options After Effects uses this setting to adjust display colors to approximate colors as they will look when finally output to the specified device or condition Step 5 Outp...

Страница 18: ...web browsers and other web based environments use the default profile in the Output Profile menu Working Space sRGB IEC61966 2 1 Since the output profile is the same as the profile used as the working space no color conversion will take place when compositions are rendered and output ...

Страница 19: ...ilters or differs in the quality of light passing through the LCD filters We see different colors on two displays even though the encoding in the digital file is the same 255 0 0 This is a case of device dependence The color appearance of an RGB value is defined by the combination of 1 color values and 2 device characteristics Device independence specifying color accurately We know that simply spe...

Страница 20: ...1 8 color values sent to your monitor will be adjusted to display the gamma 2 2 color space used by the image The CMS will attempt to reproduce color appearance as defined by the color space associated with your image or project not the color space of the device being used to show you those colors Using this color conversion framework allows you to open your After Effects project on many different...

Страница 21: ...sed by After Effects for all compositing operations The project working space acts as a central reference for color values in your project By defining a common reference for your color values After Effects can take advantage of the benefits of color management converting colors as needed in your workflow to present accurate and consistent color on a wide variety of output devices Figure 4 The Afte...

Страница 22: ...jectors and profiles for negative and print film stocks Using the Universal Camera Film Printing Density profile as a project working space The Universal Camera Film Printing Density color space is a good choice as a project working space when compositing for cinema workflows using Cineon scans from camera film There are a couple of reasons to choose this profile If you select this profile as your...

Страница 23: ...ensity 3200 FilmSceneK5205PD icc Kodak 5205 7205 Printing Density by Adobe KODAK VISION2 250D Color Negative Film 5205 7205 camera negative film scene 10 bpc DPX printing density 5500 FilmSceneK5218PD icc Kodak 5218 7218 Printing Density by Adobe KODAK VISION2 500T Color Negative Film 5218 7218 camera negative film scene 10 bpc DPX printing density 3200 FilmSceneK5229PD icc Kodak 5229 7229 Printin...

Страница 24: ...nt film presentation environment 10 bpc DPX printing density 5900 FilmTheaterF3521RDIPD icc Fujifilm 3521XD RDI Theater Preview by Adobe Theater preview of Fujicolor Positive Film 3521XD Film out on ARRI recorder with Carlos aims onto Fujicolor Recording Film ETERNA RDI printed on B H model C projected using xenon light source DPX 445 445 445 is calibrated to specified LAD Status M and LAD Status ...

Страница 25: ...olor standards in the European television industry Decodes PAL video signal to viewing room colorimetry The specification for PAL SECAM can be found here http www ebu ch CMSimages en tec_doc_t3213_tcm6 10508 pdf TV monitor presentation environment full range RGB 0 255 6500 SMPTE C icc SMPTE C Based on color standards in the US television industry Supercedes color definitions in the NTSC 1953 ICC p...

Страница 26: ...les for motion picture and video workflows Many of these profiles represent the color and lighting characteristics of scenes when captured using digital or film cameras Other profiles represent the color and lighting characteristics of images seen when viewed in environments with much more limited dynamic range like movie theaters or computer monitors For instance a typical dynamic range of a scen...

Страница 27: ...r how it will interpret luma values In other cases this translation is hidden from the user You may be working with footage from several different formats that treat luma levels in different ways This could add additional time and cost to your project as you manually tweak each piece of footage to comply with the requirements of your output The Adobe supplied 16 235 profiles address this issue and...

Страница 28: ...inter preting footage for the project working space and for the output profile However if your footage is within the limited range of 16 235 and you use the HDTV Rec 709 profile as the project working space then images will appear to have less dynamic range and contrast 3 Compress luma levels on output Choose one of the 16 235 profiles in the Color Management tab of the Output Module Settings dial...

Страница 29: ...d by the CIE that describes color using primaries based on human perception The primaries are based on how our eyes respond to different wave lengths of light Cineon A file format designed to represent scanned images for motion picture workflows Data in a Cineon file normally represents printing densities colorimeter A device that measures emitted color using three or more elements usually red gre...

Страница 30: ... density of the three primary color channels in a scan from negative film gamma The slope of a curve defining the relationship between input and output of tone This term is usually associated with monitors defining the relationship between input signals from the video card to signals sent to liquid crystal filters in a monitor HDTV Rec 709 ICC profile based on the capture and transfer characterist...

Страница 31: ...nd Absolute Colorimetric source profile An ICC profile describing the color gamut and reproduction characteristics of a device or color space from which images are captured scanned or stored such as a digital camera scanner or standard working space Colors are converted from a source profile to a destination profile spectrophotometer A device that measures a color sample throughout a specified num...

Страница 32: ... go learn_ae_documentation Forums Adobe User to User Forums http www adobe com support forums Adobe hosted forums Apple s Colorsync mail list http lists apple com mailman listinfo colorsync users Apple hosted forum for distribution of color management information Most topics are related to color management in print publishing workflows ICC Users mail list http www color org icc_users html ICC host...

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