Adding a nadir cap (mirror ball)

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I wrote a Photoshop action that produces these mirror spheres below out from<br>
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== Photoshop ==
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an equirectangular panorama. As you can see are three sizes available.<br>
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I wrote a Photoshop action that produces these mirror spheres below out from
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<br>
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an equirectangular panorama. <br />
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[[Image:Mirrorball_small.jpg]] [[Image:Mirrorball_big.jpg]] [[Image:Mirrorball_xxl.jpg]]
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As you can see are three sizes available.<br />
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<br>
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<br />
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<br>
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[[Image:Mirrorball_small.jpg]] [[Image:Mirrorball_big.jpg]] [[Image:Mirrorball_xxl.jpg]]<br />
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<br>
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<br />
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Small covers 5% ,Big 8% and XXL 12% of panorama height (equirectangular projection)<br>
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<br />
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Below you can see the region that will be covered with the mirrorball.<br>
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Small covers 5% ,Big 8% and XXL 12% of panorama height (equirectangular projection)<br />
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<br>
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Below you can see the region that will be covered with the mirrorball.<br />
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[[Image:Mirrorball_pano.jpg]]
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<br />
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<br>
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[[Image:Mirrorball_pano.jpg]]<br />
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<br>
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<br />
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<br>
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<br />
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Here the action set in Photoshop:<br>
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Here the action set in Photoshop:<br />
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<br>
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[[Image:Mirrorball_action.jpg]]<br />
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[[Image:Mirrorball_action.jpg]]<br>
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<br />
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<br>
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<br />
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<br>
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Download the Photoshop action here:<br />
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Download the Photoshop action here:
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[[Media:cap.atn]]
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[http://www.panotools.info/members/wiki/PeterNyfeler/Cap.atn Cap.atn]<br>
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<br />
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<br>
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<br />
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<br>
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A similar action with text:<br />
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For a flexible nadir cap which can be streched to your needs:
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[[Media:cap_text.atn]]
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[http://www.panotools.info/members/wiki/PeterNyfeler/CapFlex.atn CapFlex.atn]<br>
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<br />
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<br>
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<br />
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<br>
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For a flexible nadir cap which can be streched to your needs:<br />
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Don't know how to install a Photoshop action?<br>
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[[Media:CapFlex.atn]]
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<br />
 +
<br />
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Don't know how to install a Photoshop action?<br />
 
Take a look at [[How to install actions in Photoshop]]
 
Take a look at [[How to install actions in Photoshop]]
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<br>
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<br />
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<br>
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<br />
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<br>
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<br />
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'''Worklflow'''
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'''Worklflow'''<br />
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<br>
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1.) Open equirectangular / psphere image in Photoshop<br />
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1.) Open equirectangular / psphere image in Photoshop<br>
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2.) Run desired action (small / big / xxl))<br />
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2.) Run desired action (small / big / xxl))<br>
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3.) Save as....<br />
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3.) Save as....<br>
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4.) Finished<br />
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4.) Finished<br>
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<br />
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<br />
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[[User:Pitdavos|Peter Nyfeler]] (Pitdavos)
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<br />
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== ImageMagick ==
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I wrote an [[ImageMagick]] Windows [http://en.wikipedia.org/wiki/Batch_file batch file] to add a mirror sphere to an equirectangular panorama:<br />
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<pre>
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set im_convert="C:\Program Files\ImageMagick-6.5.8-Q16\convert.exe"
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set input_image=post_processed.tif
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set output_image=nadir_balled.tif
  
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rem Make the mirror ball.
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rem -crop takes the part of the image without the nadir
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rem -resize resizes the image to height of the nadir
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rem -flip flips the image vertically
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rem -level darkens the image, because reflection is never 100 percent
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%im_convert% %input_image% -crop 12780x6130+0+0 -resize 12780x260! -flip -level 0,130%% temp_nadir_ball.tif
  
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rem Make a gradient image from black to transparent. This is the ambient shadow that is casted by the mirror ball.
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%im_convert% -size 12780x130 gradient:none-black temp_gradient.png
  
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[[User:Pitdavos|Peter Nyfeler]] (Pitdavos)
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rem Place the shadow and the mirror ball on the image
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%im_convert% %input_image% -page +0+6070 temp_gradient.png -flatten -page +0+6130 temp_nadir_ball.tif -flatten %output_image%
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del temp_nadir_ball.tif
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del temp_gradient.png
  
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[[Category:Tutorial]][[Category:Tutorial:Nice to know]]
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pause
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</pre><br />
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Before using it, please adapt the following in the batch file to your situation:<br />
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<ul>
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<li>the location of ImageMagick's convert.exe</li>
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<li>the input panorama image name</li>
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<li>the output panorama image name</li>
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<li>the size of the panorama without the nadir cap (12780x6130)</li>
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<li>the size of the nadir cap (12780x260)</li>
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<li>the size of the ambient shadow (12780x130)</li>
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<li>the position of the ambient shadow on the output panorama image (+0+6070)</li>
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<li>the position of the nadir cap on the output panorama image (+0+6130)</li>
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</ul>
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<br />
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Here's an example of a mirror ball created in this way:<br /><br />
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[[File:MirrorBal_ImageMagick.jpg]]<br /><br />
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[[User:Bknops|Bert Knops]]
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[[Category:Tutorial:Nice to know]]

Latest revision as of 14:57, 5 June 2010

[edit] Photoshop

I wrote a Photoshop action that produces these mirror spheres below out from an equirectangular panorama.
As you can see are three sizes available.

Mirrorball small.jpg Mirrorball big.jpg Mirrorball xxl.jpg


Small covers 5% ,Big 8% and XXL 12% of panorama height (equirectangular projection)
Below you can see the region that will be covered with the mirrorball.

Mirrorball pano.jpg


Here the action set in Photoshop:
Mirrorball action.jpg


Download the Photoshop action here:
Media:cap.atn

A similar action with text:
Media:cap_text.atn

For a flexible nadir cap which can be streched to your needs:
Media:CapFlex.atn

Don't know how to install a Photoshop action?
Take a look at How to install actions in Photoshop


Worklflow
1.) Open equirectangular / psphere image in Photoshop
2.) Run desired action (small / big / xxl))
3.) Save as....
4.) Finished


Peter Nyfeler (Pitdavos)

[edit] ImageMagick

I wrote an ImageMagick Windows batch file to add a mirror sphere to an equirectangular panorama:

set im_convert="C:\Program Files\ImageMagick-6.5.8-Q16\convert.exe"
set input_image=post_processed.tif
set output_image=nadir_balled.tif

rem Make the mirror ball.
rem	-crop		takes the part of the image without the nadir
rem	-resize		resizes the image to height of the nadir
rem	-flip		flips the image vertically
rem	-level		darkens the image, because reflection is never 100 percent
%im_convert% %input_image% -crop 12780x6130+0+0 -resize 12780x260! -flip -level 0,130%% temp_nadir_ball.tif

rem Make a gradient image from black to transparent. This is the ambient shadow that is casted by the mirror ball.
%im_convert% -size 12780x130 gradient:none-black temp_gradient.png

rem Place the shadow and the mirror ball on the image
%im_convert% %input_image% -page +0+6070 temp_gradient.png -flatten -page +0+6130 temp_nadir_ball.tif -flatten %output_image%

del temp_nadir_ball.tif
del temp_gradient.png

pause

Before using it, please adapt the following in the batch file to your situation:

  • the location of ImageMagick's convert.exe
  • the input panorama image name
  • the output panorama image name
  • the size of the panorama without the nadir cap (12780x6130)
  • the size of the nadir cap (12780x260)
  • the size of the ambient shadow (12780x130)
  • the position of the ambient shadow on the output panorama image (+0+6070)
  • the position of the nadir cap on the output panorama image (+0+6130)


Here's an example of a mirror ball created in this way:

MirrorBal ImageMagick.jpg

Bert Knops

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