How to use enblend for patching zenith and nadir images

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* Create your panorama - use at least two partial images: One for the panorama without zenith and nadir, and (at least) one with zenith and nadir. Use TIFF for output type.
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* Create your panorama - use at least two partial images: One for the panorama without zenith and nadir, and (at least) one with zenith and nadir. Use [[TIFF]] for output type.
  
* Using TIFF-output of Panotools will automatically add an alpha-channel which shows valid areas in the projected equirectangular image. You can adapt this channel in the next steps to reflect your real needs.
+
* Using [[TIFF]] output of Panotools will automatically add an alpha-channel which shows valid areas in the projected [[equirectangular]] image. You can adapt this channel in the next steps to reflect your real needs.
  
* Load them into a image editor which can handle alpha channels (e.g. Photoshop or Gimp). Now enable the alpha channel and mark the channel for editing. Using Photoshop you will find this function in the layer windows ("Channels"):
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* Load them into a image editor which can handle alpha channels (e.g. [[Photoshop]] or [[Gimp]]). Now enable the alpha channel and mark the channel for editing. Using [[Photoshop]] you will find this function in the layer windows ("Channels"):
  
 
[[Image:Blendc1.jpg]]
 
[[Image:Blendc1.jpg]]
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* Use "save as" to save these images back on harddisk. Use "uncompressed TIFF" as file type.
 
* Use "save as" to save these images back on harddisk. Use "uncompressed TIFF" as file type.
  
''Note: When Photoshop shows the alpha-channel (you have activated the "eye" on the layer) it will be shown in semi-transparent red color. This is no real color but a visualisation of the alpha-channel. When saving the image it doesn't matter if the channel is activated or not - the channel will be included in the TIFF-image''
+
''Note: When [[Photoshop]] shows the alpha-channel (you have activated the "eye" on the layer) it will be shown in semi-transparent red color. This is no real color but a visualisation of the alpha-channel. When saving the image it doesn't matter if the channel is activated or not - the channel will be included in the TIFF-image''
  
 
* Open a command line and change to the directory where these files are saved.
 
* Open a command line and change to the directory where these files are saved.
With a command like
+
Use [[enblend]] to merge the files with a command like
  
 
enblend -vo output.tif image1.tif image2.tif
 
enblend -vo output.tif image1.tif image2.tif

Revision as of 19:06, 3 May 2005

  • Create your panorama - use at least two partial images: One for the panorama without zenith and nadir, and (at least) one with zenith and nadir. Use TIFF for output type.
  • Using TIFF output of Panotools will automatically add an alpha-channel which shows valid areas in the projected equirectangular image. You can adapt this channel in the next steps to reflect your real needs.
  • Load them into a image editor which can handle alpha channels (e.g. Photoshop or Gimp). Now enable the alpha channel and mark the channel for editing. Using Photoshop you will find this function in the layer windows ("Channels"):

Blendc1.jpg

In your images you will now see the alpha channel as a red overlay over your image:

Example Image 1:

Blend1.jpg

Example Image 2:

Blend2.jpg

  • Switch to the Alpha Channel. You can now edit the Alpha-Mask to your own needs. Use a simple brush with no feather to "paint" unwanted areas:

Modified Image 1:

Blend1a.jpg

Modified Image 2:

Blend2a.jpg

  • Use "save as" to save these images back on harddisk. Use "uncompressed TIFF" as file type.

Note: When Photoshop shows the alpha-channel (you have activated the "eye" on the layer) it will be shown in semi-transparent red color. This is no real color but a visualisation of the alpha-channel. When saving the image it doesn't matter if the channel is activated or not - the channel will be included in the TIFF-image

  • Open a command line and change to the directory where these files are saved.

Use enblend to merge the files with a command like

enblend -vo output.tif image1.tif image2.tif

you will blend these images together. Seams will be automatically positioned for best fit:

Myra.jpg

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