[photo-3d] Re: Home made Lenticular print software

[mramstad@xxxxxxxxxx]

Dave,

I am hardly an expert in lenticular printing since
I have never printed a lenticular.  My hope is that
someone with experience will jump in and correct me
when I'm wrong.

In my previous comments, I suggested that your printer
should be capable of printing many more views than two
even if you only decide to use two.  Now, I realize 
that the logic isn't quite right.  The dots per inch
of your printer are analogous to the dot pitch on your 
computer monitor.  Even though your monitor resolution 
is limited by the dot pitch, the sharpness between 
neighboring dots is very sharp.  

The same may be true of your printer, however another
issue which arises is the properties of the paper.  On
some papers the ink will diffuse across the vertical
strips more than other papers.  So the important point 
is the sharpness between the lines and experimentation 
rather than theory.  

You may want to try the following experiment to test
you printing method.

Suppose you decide the width of the edge between the 
vertical strips should should project onto half the 
spacing between your eyes ~1.25" and assume that you 
are going to view the lenticular from 12" or 10 times
the width of the projected edges.  Then assume
that the thickness of the lenticular screen is equal
to the lenticular pitch.  Then the edge thickness on
your print should be 1/10 'th the thickness of the 
lenticular sheet.  

If you are using two views, the width of each view 
will be half of the lenticular pitch or one half the
sheet thickness.  This means that
the edge between the strips should be 1/5'th of the 
width of one strip.

You can test the capabilities of your printer by 
printing a test lenticular image with white and black
interleaved strips.  When you print out the image at the
appropriate size, look at the result using a magnifying
glass to see if the edge between the strips is 1/5'th
or less of the width of each of the black and white 
strips.

I uploaded a test image called lenticular.gif into the 
files section.  The image is 512x256 pixels with 
alternate black and white strips.  You may want to crop
this image to a convenient size before printing.  For
example if it were 500 pixels wide and you were printing
at 100 lines per inch, then you could print the image
at a 5 inch width.

Good luck!  If you try this, let us know what you conclude!

Dr. Monte Ramstad
www.pokescope.com




 

Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/