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Step 12Post Processing To Adjust Depths
Aside from the usual 2D image editing, the most likely post-processing you'll want to perform involves adjusting the apparent depth of objects relative to the display or print surface.
As mentioned in step 11, as captured, the object(s) you focus on will appear to be at the surface of the display with closer things popping out. Although many 3D movies have deliberately placed objects far in front of the surface to give in-your-face impact, it really isn't a pleasant or natural way to see most scenes. Thus, it often is better to adjust the encoding so that the display behaves like a window, with 3D features all "behind the glass."
If you plan on post-processing to push objects behind the surface, you don't need to focus on the nearest object. Instead, you can use focus to isolate a particular object just as you would in 2D photography.
The post-processing to change what is at the surface is quite simple. For example, using GIMP with a green/magenta anaglyph, simply use the Decompose tool under the Colors/Components menu. Decompose the image into red, green, and blue layers. Slide the green layer left or right so that the object you want to be at the surface lines-up between the green and red/blue layers. If the shift is significant, you may need to crop the image so that the edges have full color data. Simply Compose the image when you're done.
As mentioned in step 11, as captured, the object(s) you focus on will appear to be at the surface of the display with closer things popping out. Although many 3D movies have deliberately placed objects far in front of the surface to give in-your-face impact, it really isn't a pleasant or natural way to see most scenes. Thus, it often is better to adjust the encoding so that the display behaves like a window, with 3D features all "behind the glass."
If you plan on post-processing to push objects behind the surface, you don't need to focus on the nearest object. Instead, you can use focus to isolate a particular object just as you would in 2D photography.
The post-processing to change what is at the surface is quite simple. For example, using GIMP with a green/magenta anaglyph, simply use the Decompose tool under the Colors/Components menu. Decompose the image into red, green, and blue layers. Slide the green layer left or right so that the object you want to be at the surface lines-up between the green and red/blue layers. If the shift is significant, you may need to crop the image so that the edges have full color data. Simply Compose the image when you're done.
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