P3D Re: Re; Anaglyph in Photoshop

[aifxtony@xxxxxxxxxxxxx (Tony Alderson)]

>Tom Deering wrote (digest 2871):

>Is this the correct process? Correct me if I'm wrong.

>0. Open both images in Photoshop.
>1. Change both images to greyscale.
>2. Change both images back to RGB.
>3. Click on the left image to bring it to the front. 4. Open the Channels
>palette.
>5. Click on the red channel in the palette. 6. Choose Copy from the Edit menu.
>7. Click on the right image to bring it to the front. 8. Click on the red
>channel in the >palette. 9. Choose Paste from the Edit menu.
>10. Drag the green channel to the tiny trashcan on the lower right corner
>of the >channel palette.
>11. Save your anaglyph as a high-quality JPEG under a new name.

>I don't make anaglyphs myself, but I do quite a bit of Photoshop work.
>These steps >seem like they would make a greyscale-type anaglyph. Those
>tinted full-color kind >would require a very different sequence. <

Yes, this will make a monochromatic anaglyph, altho' there is an
unnecessary step. The Left image need only be converted to grayscale. After
the Right image is converted to gray, then RGB, the Left grayscale can be
pasted into the Right image Red channel. It is not really necessary to
trash the Green channel; this is a personal preference.

My steps are:
1. Open left image, convert to grayscale
2. Open right image, convert to grayscale, convert to RGB
3. Copy Left grayscale to clipboard
4. Paste into Red channel of right image.

Making a color anaglyph is not much different, in fact a little simpler.
Simply cut and paste the red channel from the Left image into the Right
image Red channel. Many images are not successful in color anaglyph.

If you need to align the images, use Filter-Other-Offset.

Tony Alderson
aifxtony@xxxxxxxxxxxxx





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