Adobe 65008009 - After Effects CS4 Technical Paper page 6

for hdr 32-bpc files
Photoshop CS4 recognizes ICC profiles embedded in 32-bpc (bits per channel) raster files and
presents a consistent appearance match with After Effects CS4. Photoshop supports embedded
profiles for 32-bpc TIFF and PSD files. (See the sidebar for information on gamma-encoded
32-bpc files).
If you are using formats that do not support embedding of ICC profiles, it may be difficult to
create an appearance match with After Effects for those files.
1 Make edits to the 32-bpc image in Photoshop.
2 Save your changes. Select the Embed Color Profile option in the Save dialog box if you are
working with file formats that support embedded ICC profiles.
Step 4: output files
After you have made compositions in After Effects, it's time to output files using the render
queue. Before output, compositions use the color space defined in the Working Space menu in
the Project Settings dialog box. You can convert colors to a different color space using an output
module.
Follow these steps to output your compositions using color management:
1 Choose Composition > Add To Render Queue.
2 Click the highlighted text to the right of Output Module in the Render Queue panel to open
the Output Module Settings dialog box.
3 Click the Color Management tab in the Output Module Settings dialog box, and choose the
appropriate ICC color profile:
• For high-definition video output, choose the HDTV (Rec. 709) profile. After Effects
will not alter color values in your project when you choose this profile, because
the profile matches
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 choice will maintain color values even if you
change your project working space before output.
In some cases, a luma level adjustment (to the 16-235 range from the full range of
0-255) is required to prepare files for final output for display on HD TV systems. If
luma levels need to be adjusted, but are not adjusted by your codec or other software
or hardware in your workflow, you may want to choose the HDTV (Rec. 709) 16-235
profile to compress luma levels.
• For standard-definition NTSC or standard-definition PAL output, choose the SDTV
NTSC or SDTV PAL profile. In some cases, a luma level adjustment (to the 16-235
range from the full range of 0- 255) is required to prepare files for final output for
display on SD TV systems. If luma levels need to be adjusted, but are not adjusted by
your codec or other software or hardware in your workflow, you may want to choose
the SDTV NTSC 16-235 profile or the SDTV PAL 16-235 profile to compress luma
levels.
Figure 7 - Color management output settings for HD output
non-1.0 gAmmA, 32-bPC filES in PhoToShoP
Photoshop assumes an encoding using a 1.0 (linear)
gamma for all 32-bpc files. Some applications that
produce and process 32-bpc files do not encode 1.0
gamma, but use the monitor gamma to define the
tone reproduction of the image. Files using non-1.0
gamma encoding and 32 bpc will not appear correctly
when opened in Photoshop.
Color management workflow in Adobe After Effects CS4 6