JEDMICS C4

From Just Solve the File Format Problem
(Difference between revisions)
Jump to: navigation, search
(Category:Military)
Line 7: Line 7:
  
 
The name comes from an entity named JEDMICS (Joint Engineering Data Management Information and Control System), which is related in some way to the U.S. Department of Defense.
 
The name comes from an entity named JEDMICS (Joint Engineering Data Management Information and Control System), which is related in some way to the U.S. Department of Defense.
 +
 +
It was designed by Image Machines Corporation. See also [[TG4 (Image Machines)]].
  
 
== Format ==
 
== Format ==
Line 12: Line 14:
  
 
== Identification ==
 
== Identification ==
Files begin with (hex) bytes <code>80 00 00 00</code>.
+
Files begin with (hex) bytes {{magic|80 00 00 00}}. The byte at offset 36 is {{magic|04}} or {{magic|06}}. See the "Header Error Conditions" section of the specification for more constraints.
  
 
== See also ==
 
== See also ==

Revision as of 14:11, 21 February 2021

File Format
Name JEDMICS C4
Ontology
Extension(s) .c4, .ct4

JEDMICS C4 is a bi-level raster image file format. It is also known as EDMICS C4 or CALS Raster Type 4.

The name comes from an entity named JEDMICS (Joint Engineering Data Management Information and Control System), which is related in some way to the U.S. Department of Defense.

It was designed by Image Machines Corporation. See also TG4 (Image Machines).

Contents

 [hide

Format

Files have a 128-byte header, followed by a tile index, followed by the pixel data in the form of a set of 512×512-pixel tiles. Each tile is compressed with CCITT Group 4, or is uncompressed.

Identification

Files begin with (hex) bytes 80 00 00 00. The byte at offset 36 is 04 or 06. See the "Header Error Conditions" section of the specification for more constraints.

See also

Specifications

Software

Personal tools
Namespaces

Variants
Actions
Navigation
Toolbox