A step-by-step guide to producing red-green anaglyph stereo images from greyscale images using Adobe Photoshop® (tested with versions 4 upwards). To view the final image in stereo, red-green viewers (3D glasses) are required. If red-blue viewers are to be used, follow the instructions below, but at step 5 set the output levels of the red and green channels (not red and blue) to 0.
A Photoshop actions file (Anaglyph_RG.atn for Photoshop® v. 4 or newer) is available for download. When loaded into Photoshop®, the two actions (LeftToRed and RightToGreen) will automate steps 2-4 for the left image and and steps 5-6 for the right image. (To load these actions, choose Load Actions from the Actions palette menu. Locate and select the action set file [Anaglyph_RG.atn], then click Load). For more details regarding actions consult Photoshop Help or the Manual.
Navigation. To move through the guide, click on steps to the left. To return to the article, click on RETURN at top and bottom of left-hand file.