Cropped TIFF - Revision history

Richlv: document tiff offset preserving after editing in gimp

2009-08-02T13:37:16Z

document tiff offset preserving after editing in gimp

Erik Krause: Prepared for new glossary template

2007-11-17T22:18:25Z

Prepared for new glossary template

Jdsmith at 00:25, 9 October 2006

2006-10-09T00:25:03Z

Jdsmith at 00:23, 9 October 2006

2006-10-09T00:23:54Z

WikiSysop: 2 revision(s)

2006-07-13T20:27:59Z

2 revision(s)

WikiSysop: 1 revision(s)

2006-07-13T19:56:38Z

1 revision(s)

Bruno: update from Max Lyons

2006-05-17T09:29:29Z

update from Max Lyons

Bruno: update from Max Lyons

2006-05-17T09:29:29Z

update from Max Lyons

New page

A common situation when stitching images together is that most of the output image or layer is empty. This happens particularly during [[perspective correction]] or when creating [[High resolution partial panoramas]] from large numbers of photos.

This is ok except that [[panorama tools]] will labouriously process the geometry for all these empty pixels, which then consume valuable memory and disc space.

The [[TIFF]] specification allows for an image canvas to include a smaller image at an offset within the larger area using the '''XPOSITION''', '''YPOSITION''', '''TIFFTAG_PIXAR_IMAGEFULLWIDTH''' and '''TIFFTAG_PIXAR_IMAGEFULLHEIGHT''' TIFF tags, which is ideal for a typical panoramic image that is mostly empty space.

[[hugin]], [[nona]] and [[PTmender]] can be told to create such '''cropped TIFF''' files by adding ''r:CROP'' as a TIFF option to the ''panorama format'' section of the ''p'' line in a stitching script. Two [[TIFF]] output formats are supported, ''TIFF_m'' and ''TIFF_multilayer'' (note that TIFF_multilayer is only supported by [[nona]]).

For example the following ''p'' line produces multiple cropped TIFF files with LZW compression:

p f0 w1000 h500 v120 n"TIFF_m c:LZW r:CROP"

[[enblend]] can read these '''cropped TIFF''' files since version 2.4, so this technique is useful when working with enblend. Additionally the [[gimp]] image editor can open multilayer '''cropped TIFF''' files directly.

[[Category:Glossary]]

Bruno: basic page

2006-05-08T20:07:24Z

basic page

@@ Line 12: / Line 12: @@
    p f0 w1000 h500 v120 n"TIFF_m c:LZW r:CROP"
-[[enblend]] can read these '''cropped TIFF''' files since version 2.4, so this technique is useful when working with enblend.  Additionally the [[gimp]] image editor can open multilayer '''cropped TIFF''' files directly, though it cannot save them.   It can be convenient to edit the alpha masks in multi-layer TIFFs before passing them to enblend with the help of a script; see [[Multi-Layer TIFF editing with the Gimp]].
+[[enblend]] can read these '''cropped TIFF''' files since version 2.4, so this technique is useful when working with enblend.  Additionally the [[gimp]] image editor can open multilayer '''cropped TIFF''' files directly, though it cannot save them. It can be convenient to edit the alpha masks in multi-layer TIFFs before passing them to enblend with the help of a script; see [[Multi-Layer TIFF editing with the Gimp]].
 [[Category:Glossary]]

← Older revision		Revision as of 22:18, 17 November 2007
Line 1:		Line 1:
		+	{{Glossary\|TIFF flavor where the image canvas includes a smaller image at an offset within the larger area.}}
	A common situation when stitching images together is that most of the output image or layer is empty. This happens particularly during [[perspective correction]] or when creating [[High resolution partial panoramas]] from large numbers of photos.		A common situation when stitching images together is that most of the output image or layer is empty. This happens particularly during [[perspective correction]] or when creating [[High resolution partial panoramas]] from large numbers of photos.

@@ Line 11: / Line 11: @@
    p f0 w1000 h500 v120 n"TIFF_m c:LZW r:CROP"
-[[enblend]] can read these '''cropped TIFF''' files since version 2.4, so this technique is useful when working with enblend.  Additionally the [[gimp]] image editor can open multilayer '''cropped TIFF''' files directly, though it cannot save them.   It can be convenient to edit the alpha masks in multi-layer TIFFs before passing them to enblend; see [[Multi-Layer TIFF editing with the Gimp]].
+[[enblend]] can read these '''cropped TIFF''' files since version 2.4, so this technique is useful when working with enblend.  Additionally the [[gimp]] image editor can open multilayer '''cropped TIFF''' files directly, though it cannot save them.   It can be convenient to edit the alpha masks in multi-layer TIFFs before passing them to enblend with the help of a script; see [[Multi-Layer TIFF editing with the Gimp]].
 [[Category:Glossary]]

← Older revision	Revision as of 20:27, 13 July 2006
(One intermediate revision by one user not shown)

@@ Line 3: / Line 3: @@
 This is ok except that [[panorama tools]] will labouriously process the geometry for all these empty pixels, which then consume valuable memory and disc space.
-The [[TIFF]] specification allows for an image canvas to include a smaller image at an offset within the larger area using the '''XPOSITION''' and '''YPOSITION''' TIFF tags, which is ideal for a typical panoramic image that is mostly empty space.
+The [[TIFF]] specification allows for an image canvas to include a smaller image at an offset within the larger area using the '''XPOSITION''', '''YPOSITION''', '''TIFFTAG_PIXAR_IMAGEFULLWIDTH''' and '''TIFFTAG_PIXAR_IMAGEFULLHEIGHT''' TIFF tags, which is ideal for a typical panoramic image that is mostly empty space.
-[[hugin]], [[nona]] and [[PTmender]] can be told to create such '''cropped TIFF''' files by adding ''r:CROP'' as a TIFF option to the ''panorama format'' section of the ''p'' line in a stitching script.  Two [[TIFF]] output formats are supported, ''TIFF_m'' and ''TIFF_multilayer''.
+[[hugin]], [[nona]] and [[PTmender]] can be told to create such '''cropped TIFF''' files by adding ''r:CROP'' as a TIFF option to the ''panorama format'' section of the ''p'' line in a stitching script.  Two [[TIFF]] output formats are supported, ''TIFF_m'' and ''TIFF_multilayer'' (note that TIFF_multilayer is only supported by [[nona]]).
 For example the following ''p'' line produces multiple cropped TIFF files with LZW compression: