[APML]: Re: Stacking Images in Photoshop

[Alfredo Zanazzo <alferd@mbox.lol.it>]

Chuck Vaughn wrote:
> 
> Hi Alfredo,
> 
> > And does anybody know if with photoshop you could find a fast and
> > effective way to superimpose two identical images coming from different
> > sources, provided they have the exact identical dimension and they have
> > been scanned at same resolution?
> 
> I don't know if this fast and effective but it does work. I also have
> instructions on doing it with Layers which is supposed to easier to
> align the images. I need to find time to try it and learn how to use
> Layers.
> 
> Chuck  <aa6g@aa6g.org>
> 
> ---------------------------------------------------------------------------
> 
> Stacking Images in Photoshop (Not Using Layers)
> 
> 1) Scan the two images to the same size. Scan them a little larger
> than you want to allow for cropping. Save both images.
> 
> Note: The value of the majority of the pixels must be be below
> 128 as viewed in the Histogram. Values higher than 127 when added
> will be set to 255 (saturated). This will cause your image to be
> blocked up. You have to adjust the scan to get it right.
> 
> 2) Crop image #1 by using a star in one corner as a reference and
> cropping to a star in the opposite corner. Make sure the Info
> Palette is on so you can see the image size in pixels. Note the size
> of the image before you execute the crop.
> 
> 3) Select image #2 and draw the crop box to the size noted in (2). If
> the star in the opposite corner is out of position, the image will
> need to be rotated by a small amount. Deselect the crop and take a
> guess and rotate image #2.
> 
> 4) Repeat (3) until the stars line up in opposite corners with the
> correct image size.
> 
> 5) Use the Apply Image command and Add image #1 to image #2. Scroll
> around to see that the stars are properly overlayed. If not, you
> have to go back to the original uncropped image (use Revert under File)
> and repeat the procedure until you get the rotation right.
> 
> Note: Apply will not work unless both images are exactly the same size.
> 
> 6) Adjust Contrast/Brightness/Color/etc. until the image is what you
> want to see.
> 
> With a little practice I can do this in 5 to 10 minutes.Very good!!
It is worth while to try!
-- 

--
Regards, Alfredo Zanazzo ( alferd@mbox.lol.it )

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