Canon RAW 2 - Revision history

Dexvertbot: Change telparia.com samples link to template

2023-12-28T02:56:10Z

Change telparia.com samples link to template

Shio at 14:45, 4 October 2023

2023-10-04T14:45:55Z

Thorsted: Wikidata

2020-09-30T19:25:42Z

Wikidata

Sembiance: Added sample files

2020-08-05T17:32:11Z

Added sample files

Thorsted: /* References */

2020-01-15T19:34:39Z

‎References

Thorsted: /* Modified files */ updated link to wayback machine archived version.

2020-01-15T07:02:19Z

‎Modified files: updated link to wayback machine archived version.

Effect2: Added mention of Canon RAW 3

2019-12-04T01:46:01Z

Added mention of Canon RAW 3

Dan Tobias: /* References */

2014-11-23T17:48:34Z

‎References

Dan Tobias: /* References */

2014-11-05T00:38:48Z

‎References

Jsummers: Cleanup

2013-12-12T23:50:02Z

Cleanup

@@ Line 49: / Line 49: @@
 == Sample files ==
-* https://telparia.com/fileFormatSamples/image/cr2/
+* {{DexvertSamples|image/cr2}}
 == References ==

@@ Line 2: / Line 2: @@
 |formattype=electronic
 |subcat=Cameras and Digital Image Sensors
 |extensions={{ext|cr2}}
 |pronom={{PRONOM|fmt/592}}

@@ Line 4: / Line 4: @@
 |extensions={{ext|cr2}}
 |pronom={{PRONOM|fmt/592}}
 }}
 '''Canon RAW 2''' ('''CR2''') is a raw image format used by Canon cameras. It replaced [[Camera Image File Format|CRW]], starting with the 20D, 350D/Digital Rebel Xt and 1D. It was replaced by [[Canon RAW 3]].

@@ Line 45: / Line 45: @@
 * http://www.cpanforum.com/threads/1055
 * http://www.cpanforum.com/threads/5170
 == References ==

@@ Line 51: / Line 51: @@
 * [https://github.com/lclevy/libcraw2/blob/master/docs/cr2_poster.pdf CR2 format documentation poster]
 * [https://twitter.com/lorenzo2472/status/536569538083844098/photo/1 Format poster image]
 [[Category:TIFF]]

@@ Line 40: / Line 40: @@
 == Modified files ==
-Apparently Canon's proprietary software modifies the RAW file. Other proprietary software seems to choke on said modified files (http://www.prophotohome.com/forum/raw-photo-processing-software-technique/62864-cr2-raws-converted-dpp-wont-open-aperture.html).
+Apparently Canon's proprietary software modifies the RAW file. Other proprietary software seems to choke on said modified files (https://web.archive.org/web/20150512011452/http://www.prophotohome.com/forum/raw-photo-processing-software-technique/62864-cr2-raws-converted-dpp-won-t-open-aperture.html).
 ExifTool has some info:

@@ Line 5: / Line 5: @@
 |pronom={{PRONOM|fmt/592}}
 }}
-Formats used by '''Canon''' cameras include:
+== Organization ==
-−
-== CRW ==
-−
-CRW, aka [[Camera Image File Format]] is an attempt by Canon to standardise camera files.
-−
-== CR2 ==
-−
-Canon RAW 2 (CR2) came to replace CRW, starting the 20D, 350D/Digital Rebel Xt and 1D.
-−
-=== Organization ===
 Canon CR2 files are TIFF files. All is organised in a TIFF / IFD file.
-On of the differenciation with the CR2 files is that they have a header before the IFD0. This does not violate the TIFF spec.
+On of the differentiation with the CR2 files is that they have a header before the IFD0. This does not violate the TIFF spec.
 {|
@@ Line 26: / Line 17: @@
 | 0 || 8 || TIFF header
 |-
-| 8 || 2 || litteral 'CR'
+| 8 || 2 || literal 'CR'
 |-
 | 10 || 1 || major version (2)
@@ Line 37: / Line 28: @@
 Exif is attached to the ExifIFD of IFD0. The CFA data is in IFD3.
-=== Compression ===
+== Compression ==
-−
 Canon CR2 files use the old original [[Lossless JPEG (original)|Lossless JPEG]] standard for the RAW data. The same used by [[DNG|Adobe DNG]].
@@ Line 49: / Line 39: @@
 The slicing means that the output scanlines have to be reorganised as they are shorter to have a top -> bottom then left -> right, a bit like columns of text. (TODO: do a nice diagram)
-=== Modified files ===
+== Modified files ==
 Apparently Canon's proprietary software modifies the RAW file. Other proprietary software seems to choke on said modified files (http://www.prophotohome.com/forum/raw-photo-processing-software-technique/62864-cr2-raws-converted-dpp-wont-open-aperture.html).
@@ Line 56: / Line 46: @@
 * http://www.cpanforum.com/threads/5170
-=== References ===
+== References ==
 * http://lclevy.free.fr/cr2/
 * http://web.archive.org/web/20061125031802/http://crousseau.free.fr/imgfmt_raw.htm (in French, by one of the developers of DxO) - Using the wayback machine !