3D Gugle
User's guide

(Sample of Layers Assembly)
[Intermediate frames from a stereo pairs]

3D Gugle has two laboratories for extracting the intermediate frames from a stereo pair for eventual lenticular printing, "Stereo Analysis" and "Layers Assembly".

In the "Stereo Analysis" LAB an automatic method is used that produces the intermediate frames by an interpolation process.
In the "Layers Assembly" laboratory, which uses Layers as a work element, it is possible to extract the intermediate frames automatically with the "Rotate" function or manually with the ordinary functions for Layers management.

To apply graphics transformations to the Layers (rotation, zoom, various deformations, etc.) and to produce the intermediate frames precisely and rapidly, see: "Algorithms to Layers" and also "Pattern and Texture".
 

"Stereo Analysis" extracts the intermediate frames a hundred times more slowly than the Layers method but is only suitable when the stereo image does not have great perspective depth.
Although a check of the digital film can seem satisfactory, it can be different from the real result of a lenticular print. It is therefore recommended that a test print is made with the interpolated frames before undertaking the onerous task of Layers extraction .
If the image has great perspective depth, as in the example above, the inevitable jerkiness can be reduced by using the "Blur" laboratory on the left and right images and then cropping unwanted areas in the "Combine" laboratory.

Note
You can broaden your potential market by producing 'antique' stereo images in lenticular format.

If these images are stereo pairs, it is possible to remove the defects of the bilateral difference, the stains and do some retouching using "Paint LAB" and freeview (cross-eyed or parallel) the result using the "Synchro Window".
Any defects will be very evident.

If the images are anaglyph, you can convert them to stereo pairs with the 3D Gugle function "Open Anaglyph as Stereo pairs".

"The Layers method"

The intermediate Layers for lenticulars prints are very different from those intended for freeviewing or with a stereoscope.
The intermediate Layers cannot have any distortions, only perspective (depth) steps.
For instance, suppose that your image contains a long depth-plane such as a lake. When making an ordinary stereo image the plane can be deformed while for lenticular prints the plane must be cut out into many slices.

The example below is in cross-eyed format.

Distortion for ordinary stereo

Stepped depth-layers for lenticular printing

The second great difference is that the Layers cannot be cut out following the contained figures of the image, as is done with an ordinary stereo image, but must be cut out symmetrically with equal depth-steps and keeping in mind how much of the image to include in each depth-step.

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