How to use enblend for patching zenith and nadir images - Revision history

Erik Krause: 1 revision(s)

2007-03-21T18:09:03Z

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Erik Krause: categorized

2007-03-21T18:07:00Z

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WikiSysop: 6 revision(s)

2006-07-13T20:28:01Z

6 revision(s)

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2006-07-13T19:56:40Z

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Erik Krause: categorized

2005-11-12T16:37:29Z

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Erik Krause: categorized

2005-11-12T16:37:29Z

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* Create your panorama as two partial images:
One image will include only the horizontal part of the panorama without [[zenith]] and [[nadir]] (if using [[PTGui]], select only the horizontal images in the Include images area of the Create Panorama tab).
The other image will include only the zenith and nadir (if using PTGui, select only the zenith and nadir images in the Include images area of the Create Panorama tab).
Use [[TIFF]] for output type (if using PTGui, select TIFF in the Create Panorama tab in the File format: section.

* Using [[TIFF]], Panotools will automatically add to output images, 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"):

[[Image:Blendc1.jpg]]

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

Example Image 1:

[[Image:Blend1.jpg]]

Example Image 2:

[[Image: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. Edit the alpha channel by painting black to exclude areas, and white to include areas.
(Photoshop, press d for default colors. Press x to switch between black and white). Black paint will show up as red, if you are using Photoshop's default colors
Modified Image 1:

[[Image:Blend1a.jpg]]

Modified Image 2:

[[Image: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:

[[Image:Myra.jpg]]

[[Category:Tutorial]][[Category:Tutorial:Nice to know]]

Bruno: linkified

2005-10-19T14:47:35Z

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Patrick Born at 13:07, 30 July 2005

2005-07-30T13:07:43Z

Patrick Born at 12:55, 30 July 2005

2005-07-30T12:55:07Z

Bruno: linkified

2005-05-03T17:06:31Z

linkified

← Older revision		Revision as of 18:07, 21 March 2007
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	[[Image:Myra.jpg]]		[[Image:Myra.jpg]]

−	~~[[Category:Tutorial]]~~[[Category:Tutorial:Nice to know]]	+	[[Category:Tutorial:Nice to know]]

← Older revision		Revision as of 16:37, 12 November 2005
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	[[Image:Myra.jpg]]		[[Image:Myra.jpg]]
		+
		+	[[Category:Tutorial]][[Category:Tutorial:Nice to know]]

← Older revision		Revision as of 12:55, 30 July 2005
Line 1:		Line 1:
−	* 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.	+	* Create your panorama as two partial images:
		+	One image will include only the horizontal part of the panorama without zenith and nadir (if using PTGui, select only the horizontal images in the Include images area of the Create Panorama tab).
		+	The other image will include only the zenith and nadir (if using PTGui, select only the zenith and nadir images in the Include images area of the Create Panorama tab).
		+	Use [[TIFF]] for output type (if using PTGui, select TIFF in the Create Panorama tab in the File format: section.

	* 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.

@@ Line 1: / Line 1: @@
-* 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.
+* 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"):
+* 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]]
@@ Line 29: / Line 29: @@
 * 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.
-With a command like
+Use [[enblend]] to merge the files with a command like
 enblend -vo output.tif image1.tif image2.tif

← Older revision	Revision as of 20:28, 13 July 2006
(One intermediate revision by one user not shown)

@@ Line 1: / Line 1: @@
 * Create your panorama as two partial images:
-One image will include only the horizontal part of the panorama without zenith and nadir (if using PTGui, select only the horizontal images in the Include images area of the Create Panorama tab).
+One image will include only the horizontal part of the panorama without [[zenith]] and [[nadir]] (if using [[PTGui]], select only the horizontal images in the Include images area of the Create Panorama tab).
 The other image will include only the zenith and nadir (if using PTGui, select only the zenith and nadir images in the Include images area of the Create Panorama tab).
 Use [[TIFF]] for output type (if using PTGui, select TIFF in the Create Panorama tab in the File format: section.
-* Using [[TIFF]], Panotools will automatically add to output images, 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]], Panotools will automatically add to output images, 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"):

@@ Line 4: / Line 4: @@
 Use [[TIFF]] for output type (if using PTGui, select TIFF in the Create Panorama tab in the File format: section.
-* 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]], Panotools will automatically add to output images, 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"):
@@ Line 20: / Line 20: @@
 [[Image: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:
+* 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. Edit the alpha channel by painting black to exclude areas, and white to include areas.
+(Photoshop, press d for default colors. Press x to switch between black and white). Black paint will show up as red, if you are using Photoshop's default colors
 Modified Image 1: