Png

2010-03-16T11:01:25Z

David80: /* DPI Setting */

'''png''' writes a png format image file of the current image to disk.

===USAGE===
png filename, dpi, ray

* '''dpi''', sets the dots per inch (dpi) of the final image
* '''ray''', whether or not PyMOL ray traces the image before saving

===PYMOL API===
<source lang="python">
cmd.png( string file, dpi, ray )
</source>

===COMMENTS===

====Blank Screen Shots====
If, when you execute the [[Png]] command, you get blank images, you may have to [[Ray]] trace your image first, before running the [[Png]] command. This occurs when there is no device context for the image, such as when running PyMOL in quiet gui-less mode. If the ray tracing is taking too long due to scene complexity or size, then please see the [[Ray]] page or search the wiki for information about making movies with PyMOL (there are many ways to [[:Category:Performance|speed]] up rendering).

====Transparent Backgrounds====
See [[Ray_opaque_background]]. This is very useful for presentations, or images that are placed on top of a background of nonuniform color, or if you simply want a transparent background for your images.

====DPI Setting====
Use the DPI option to have PyMol set the DPI of your image. If I execute
<source lang="python">ray 1200,1200</source>
then execute
<source lang="python">png /tmp/ex.png, dpi=300</source>
I will get a four-inch square image at 300dpi. Leaving off the '''dpi''' flag would net me a 1200x1200 image at 72dpi. This saves the intermediate step of having to use GIMP/PhotoShop/etc to rescale your photos for publication.

====External links====
* [http://www.bestdissertation.com/services/thesis.html thesis]

[[Category:Commands|Png]]
[[Category:Publication_Quality|Png]]
[[Category:Performance|Png]]

PyMOL Wiki - User contributions [en]

Png