Bracketing - Revision history

Erik Krause: glossaryfied

2007-12-15T16:32:50Z

glossaryfied

Erik Krause: 1 revision(s)

2007-03-21T18:09:01Z

1 revision(s)

Erik Krause: categorized

2007-03-21T18:07:00Z

categorized

Erik Krause: categorized

2007-03-17T19:53:38Z

categorized

Bruno: clarification

2006-08-18T16:10:17Z

clarification

Bruno: pasted stuff from mailing list

2006-08-18T12:07:39Z

pasted stuff from mailing list

New page

Most digital cameras allow taking of '''bracketed''' shots, ie. more than one picture
of the same scene, but at different exposures.

This can be useful when photographing panoramas.

= Panoramic stitching techniques =

== Simple ==

Pick the best exposed set of images and discard the rest.

* This may be good enough, though you lose the ability to use the entire dynamic range in the final panorama.

== Contrast blend bracketed shots ==

Use [[Contrast Blending]] to merge each bracketed view, then stitch
these 8bit images into an 8bit panorama.

* You have to use the same 'exposure' when merging each shot, but you don't know what that needs to be until you have finished and can see the result (not a problem if you use a [[full 16 bit workflow]]).

== Contrast blend bracketed panoramas ==

Stitch each exposure step into a complete 8bit panorama, then merge
these with [[Contrast Blending]] into an 8bit panorama.

* Running [[enblend]] multiple times is slow.
* [[Ghosting]] unless your panoramas are aligned perfectly.

== Convert bracketed shots to HDR ==

Merge each bracketed view into an [[HDR]] image, stitch these into an
HDR panorama and then reduce to 8bit with [[tone mapping]].

* Local tone mapping operators produce ugly artefacts in [[equirectangular]] panoramas.
* Currently this workflow is only possible with [[hugin]].

== Convert bracketed panoramas to HDR ==

Stitch each exposure step into a complete 8bit panorama, then
merge these into an [[HDR]] panorama and reduce to 8bit with tone
mapping.

* Running [[enblend]] multiple times is slow.
* Local [[tone mapping]] operators produce ugly artefacts in [[equirectangular]] panoramas.
* [[Ghosting]] unless all your panoramas are aligned perfectly.

== Tone map bracketed shots ==

Merge each bracketed view into an [[HDR]] image, use a [[tone mapping]]
operator to generate 8bit images. Then stitch these into an 8bit panorama.

* You have to use the same tone mapping settings for each shot, but you don't know what that needs to be until you have finished and can see the result (not a problem with a [[full 16 bit workflow]]).
* Local tone mapping operators will behave differently for overlapping areas, you need to hope that blending with [[enblend]], [[smartblend]] or [[PTGui]] will fix them.

← Older revision		Revision as of 16:32, 15 December 2007
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		+	{{Glossary\|Shooting more than one picture of the same scene but at different exposure}}
	Most digital cameras allow taking of '''bracketed''' shots, ie. more than one picture		Most digital cameras allow taking of '''bracketed''' shots, ie. more than one picture
	of the same scene, but at different exposures.		of the same scene, but at different exposures.

← Older revision		Revision as of 18:07, 21 March 2007
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	* Local tone mapping operators will behave differently for overlapping areas, you need to hope that blending with [[enblend]], [[smartblend]] or [[PTGui]] will fix them.		* Local tone mapping operators will behave differently for overlapping areas, you need to hope that blending with [[enblend]], [[smartblend]] or [[PTGui]] will fix them.

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

← Older revision		Revision as of 19:53, 17 March 2007
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	* You have to use the same tone mapping settings for each shot, but you don't know what that needs to be until you have finished and can see the result (less of a problem with a [[full 16 bit workflow]]).		* You have to use the same tone mapping settings for each shot, but you don't know what that needs to be until you have finished and can see the result (less of a problem with a [[full 16 bit workflow]]).
	* Local tone mapping operators will behave differently for overlapping areas, you need to hope that blending with [[enblend]], [[smartblend]] or [[PTGui]] will fix them.		* Local tone mapping operators will behave differently for overlapping areas, you need to hope that blending with [[enblend]], [[smartblend]] or [[PTGui]] will fix them.
		+
		+	[[Category:Tutorial]][[Category:Tutorial:Nice to know]]

@@ Line 17: / Line 17: @@
 these 8bit images into an 8bit panorama.
-* You have to use the same 'exposure' when merging each shot, but you don't know what that needs to be until you have finished and can see the result (not a problem if you use a [[full 16 bit workflow]]).
+* You have to use the same 'exposure' when merging each shot, but you don't know what that needs to be until you have finished and can see the result (less of a problem if you use a [[full 16 bit workflow]]).
 == Contrast blend bracketed panoramas ==
@@ Line 50: / Line 50: @@
 operator to generate 8bit images.  Then stitch these into an 8bit panorama.
-* You have to use the same tone mapping settings for each shot, but you don't know what that needs to be until you have finished and can see the result (not a problem with a [[full 16 bit workflow]]).
+* You have to use the same tone mapping settings for each shot, but you don't know what that needs to be until you have finished and can see the result (less of a problem with a [[full 16 bit workflow]]).
 * Local tone mapping operators will behave differently for overlapping areas, you need to hope that blending with [[enblend]], [[smartblend]] or [[PTGui]] will fix them.