Difference between revisions of "Publication Quality Images"

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The answer is deceivingly simple.  There are two steps in the process.  First, setup your scene and use [[Cmd ray|ray]] like this
 
The answer is deceivingly simple.  There are two steps in the process.  First, setup your scene and use [[Cmd ray|ray]] like this
 
  ray 2400, 2400
 
  ray 2400, 2400
From this you will get a large square image.  You can now resize it to X inches where X=A*B, A and B factors of 2400  (eg: 8 inch photo @ 300DPI, 4 inch photo at 600DPI, 2 inch photo @ 1200DPI).  The fomrula for creating images is:
+
From this you will get a large square image.  You can now resize it to X inches where X=A*B, A and B factors of 2400  (eg: 8 inch photo @ 300DPI, 4 inch photo at 600DPI, 2 inch photo @ 1200DPI).  The formula for creating images is:
 
  rayVal = inches * DPI
 
  rayVal = inches * DPI
 
where rayVal is the value you pass to "ray".  Thus, an 8 inch square photo at 72, 100, and 300 DPI would be created by the following commands:
 
where rayVal is the value you pass to "ray".  Thus, an 8 inch square photo at 72, 100, and 300 DPI would be created by the following commands:
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* Save Image (File->Save)
 
* Save Image (File->Save)
  
You should be set.  
+
You should be set.
+
 
 
=== See Also ===
 
=== See Also ===
 
[[Png]] [[Ray]] [[Draw]] [[CMYK]]
 
[[Png]] [[Ray]] [[Draw]] [[CMYK]]

Revision as of 01:17, 27 February 2008

High Resolution (DPI) Images

Creating Resolution Specific Images

We often get the question:

Q.  How do I create a X DPI image using PyMol's 'ray' command?

The answer is deceivingly simple. There are two steps in the process. First, setup your scene and use ray like this

ray 2400, 2400

From this you will get a large square image. You can now resize it to X inches where X=A*B, A and B factors of 2400 (eg: 8 inch photo @ 300DPI, 4 inch photo at 600DPI, 2 inch photo @ 1200DPI). The formula for creating images is:

rayVal = inches * DPI

where rayVal is the value you pass to "ray". Thus, an 8 inch square photo at 72, 100, and 300 DPI would be created by the following commands:

ray 576,576   # 8inch * 72dpi
ray 800,800   # 8inch * 100dpi; or a 4inch * 200 DPI photo; or 1x800.
ray 2400,2400 # 8inch * 300dpi; 6"x400dpi, etc...


The new and better solution is to use the Png command with the dpi setting, such as

png fileName, dpi=300

If you don't have a new enough version of PyMOL that supports this, then the old solution is to use PhotoShop or GIMP to resize the photo to the appropriate height and width while making sure also to tell the PhotoShop or GIMP what resolution the image is.


GIMP 2.0

In Gimp, load your image (it'll most likely be very large) then

  • Select:
Image ->
Scale Image ->
'Print Size & Scale Image Section' change 'New Width' to whatever width you decided on before.
  • Save Image (File->Save)

You should be set.

See Also

Png Ray Draw CMYK