Adobe Photoshop CS4 - Manual (Page 610)

603 USING PHOTOSHOP CS4
3D and technical imaging
Last updated 1/10/2010
Saving and exporting 3D files (Photoshop Extended)
To preserve the 3D content in a file, save the file in Photoshop format or another supported image format. You can
also export a 3D layer as a file in a supported 3D file format.
Export a 3D layer
You can export 3D layers in all supported 3D formats: Collada DAE, Wavefront/OBJ, U3D, and Google Earth 4 KMZ.
When choosing an export format, consider the following factors:
• Texture layers are saved in all 3D file formats; however, U3D preserves only Diffuse, Environment, and Opacity
texture maps.
• Wavefront/OBJ format does not save camera settings, lights, or animation.
• Only Collada DAE saves render settings.
To export a 3D layer, do the following:
1 Choose 3D > Export 3D layer
2 Choose a format for exporting textures:
• U3D and KMZ support JPEG or PNG as texture formats.
• DAE and OBJ support all Photoshop-supported image formats for textures.
3 (Optional) If exporting to U3D format, choose an encoding option. ECMA 1 is compatible with Acrobat 7.0; ECMA
3 is compatible with Acrobat 8.0 and later and provides some mesh compression.
4 Click OK to export.
Save a 3D file
To preserve 3D model position, lighting, render mode, and cross sections, save files with 3D layers in PSD, PSB, TIFF,
or PDF format.
❖ Choose File > Save or File > Save As, select Photoshop (PSD), Photoshop PDF, or TIFF format, and click OK.
DICOM files (Photoshop Extended)
About DICOM files (Photoshop Extended)
DICOM (an acronym for Digital Imaging and Communications in Medicine) is the most common standard for
receiving medical scans. Photoshop Extended allows you to open and work with DICOM (.dc3, .dcm, .dic, or no
extension) files. DICOM files can contain multiple “slices” or frames, which represent different layers of a scan.
Photoshop reads all frames from a DICOM file and converts them to Photoshop layers. Photoshop can also place all
DICOM frames in a grid on one layer, or open frames as a 3D volume which you can rotate in 3D space. Photoshop
can read 8-, 10-, 12-, or 16-bit DICOM files. (Photoshop converts 10- and 12-bit files to 16-bit files.)
Once you’ve opened a DICOM file in Photoshop, you can use any Photoshop tool to adjust, mark up, or annotate the
file. For example, use the Notes tool to add a comment to the file, the Pencil tool to mark a specific area of the scan or
the Dust And Scratches filter to remove dust or scratches from a scan. Use the Ruler or selection tools to make
measurements of image content.