MDI

File Format
Name	MDI
Ontology	Electronic File Formats Graphics MDI ; ; ;
Extension(s)	.mdi
MIME Type(s)	image/vnd.ms-modi

Revision as of 14:52, 5 October 2013

MDI is a proprietary image format used by Microsoft Office Document Imaging.

It is almost identical to TIFF, but has a different header, and may use one of several undocumented compression schemes.

Files begin with bytes 45 50 2a 00.

The compression schemes are reportedly defined as follows:

Code	Compression scheme
34718	Binary Level Codec (BLC)
34719	Progressive Transform Codec (PTC)
34720	Vector

Other sources give the following, but 34719 and 34720 may have been accidentally swapped.

@@ Line 13: / Line 13: @@
 == Compression ==
-The compression schemes are reportedly known by the following names:
+The compression schemes are reportedly defined as follows:
 {| class="wikitable"
@@ Line 19: / Line 19: @@
 ! Compression scheme
 |-
-|34718 || MODI_BLC
+|34718 || Binary Level Codec (BLC)
 |-
-|34719 || MODI_VECTOR
+|34719 || Progressive Transform Codec (PTC)
 |-
-|34720 || MODI_PTC
+|34720 || Vector
 |}
-Another source swaps the definitions of 34719 and 34720:
+Other sources give the following, but 34719 and 34720 may have been accidentally swapped.
 {| class="wikitable"
@@ Line 32: / Line 32: @@
 ! Compression scheme
 |-
-|34718 || Binary Level Codec
+|34718 || MODI_BLC
 |-
-|34719 || Progressive Transform Codec
+|34719 || MODI_VECTOR
 |-
-|34720 || Vector
+|34720 || MODI_PTC
 |}
@@ Line 43: / Line 43: @@
 * [[Wikipedia:Microsoft Office Document Imaging]]
 * [http://www.iana.org/assignments/media-types/image/vnd.ms-modi Media type registration]
+* Possibly related: [http://research.microsoft.com/apps/pubs/?id=101991 Fast Progressive Image Coding Without Wavelets]
 [[Category:Microsoft]]
 [[Category:TIFF]]

File Format
Name	MDI
Ontology	Electronic File Formats Graphics MDI
Extension(s)	`.mdi`
MIME Type(s)	image/vnd.ms-modi