[thelist] Image conversion

Hello,

There are a few software products that specialize in converting image file
formats and at least one of them should handle your conversion. One's called
Hi-Jaak, and it's available for trial download/purchase at
http://www.imsisoft.com/hijaak/hijaakexp.html.  Another good one is Image
Alchemy, available at http://www.handmadesw.com/Products/Image_Alchemy.htm, or
you can try it online at http://www.handmadesw.com/Online_Demo/index.html.

Try renaimg those .c4 files to .cal if they won't convert 'as-is'.

Now, here's the poop on that (those?) file format(s)

Ok, this .c4 thing is a little tricky when it comes to pinning down an exact
format.  .c4 is called the 'JEDMICS', or Joint Engineering Data Management
Information and Control System format, and it may or may not be compatible with
.cal images, which are called 'CALS' or Computer Aided Acquisition and Logistics
Support Raster Format.  Anyhoo, the JEDMICS website is at
http://jrts.jedmics.navy.mil/ and you can't get in unless you're one of those
military types.  Both are projects of the military, and both are vector format
images, which means they use coordinates, lines, and angles to render image data
instead of pixels, like .bmp, .gif, .jpg and other more common formats.  The
benefits of this include small file size and less quality loss when you expand
the image size.

I think I've rambled enough.  Hope this helps some.

Seth

<!-- SNIP! -->
Subject: CALS - Computer Aided Acquisition and Logistics Support Raster Format

         Type: Bitmap
    Extension: .cal
      Version:
  Compression: CCITT Group 4 (MMR)
  Color Depth: 1-bit
   Maintainer: CALS Management Support Office (DCLSO)
Specification:

CALS files are used for document imaging and therefore only store
black-and-white, 1-bit image data. CALS Type I files only store a single
image per file and the data is always compressed using the CCITT Group 4
encoding algorithm. CALS Type II files may stored multiple images per file,
the image data may be tiled, and tiles stored as raw data or as data
compressed using CCITT Group 4 encoding.

The CALS raster file format is defined primarily in the following
military standards documents:

  MIL-STD-1840A, Automated Interchange of Technical Information
  MIL-R-28002A, Requirements for Raster Graphics Representation
    in Binary Format

The CALS raster file format is supported through the CALS office of the
United States Department of Defense:

  CALS Management Support Office (DCLSO)
  Office of the Assistant Director for Telecommunications andInformation Systems
  Headquarters Defense Logistics Agency
  Cameron Station
  Alexandria, VA 22314 USA

  The CALS Home Page
  http://www.acq.osd.mil/cals/

<!-- SNIP! -->

>  -----Original Message-----
>  From: thelist-admin@lists.evolt.org
>  [mailto:thelist-admin@lists.evolt.org]On Behalf Of Daniel J. Cody
>  Sent: Wednesday, September 22, 1999 2:01 PM
>  To: thelist@lists.evolt.org
>  Subject: Re: [thelist] Image conversion
>
>
>  Hi, I got a couple leads about this off-list, but still no luck. I do
>  have some more info on what type of images they are, if
>  anyone knows of
>  a way to open CALS complaint Group 4 wrap images in PS or another
>  graphics program, I'd love you :)
>
>  They're a military format, but thats about all i know.. Thanks again,
>
>  .djc.
>
>  "Daniel J. Cody" wrote:
>  >
>  > Hola Evolta -
>  >
>  > I have a client who has a bunch of images with a .c4
>  extension that I'd
>  > like to convert to a 'regular' format. They're proprietary
>  in nature,
>  > and require a viewer called imageR to open them.
>  >
>  > Has anyone ever dealth with images like these before and
>  know if there
>  > is a filter I can run them through in PS to spit out a
>  .gif or .jpg or
>  > .png?
>
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