Header File Format

[Ye Chen]

Hello,
I am trying to understand the source code of TiffDecoder.java. It will be
easy for me to understand why it was coded like that if I know the format
of tiff header file. So is there anyone to know where I can find reference
to describe the format of Tiff header file as well as header file format
for other image types like JPEG, BMP.

Thanks in advance

[Gino Canessa]

Ye Chen,

Following is a link to a site I came across when I was looking up
something similar; it has information on many different (2D) file
formats.

http://www.dcs.ed.ac.uk/home/mxr/gfx/2d-hi.html

If you need information on 3D formats, the link is similar:

http://www.dcs.ed.ac.uk/home/mxr/gfx/3d-hi.html

Finally, the site itself lists some other helpful information:

http://www.dcs.ed.ac.uk/home/mxr/gfx/


Hope this helps,

        Gino


Gino Canessa
 
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-----Original Message-----
From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of Ye
Chen
Sent: Monday, August 01, 2005 1:12 PM
To: [hidden email]
Subject: Header File Format

Hello,
I am trying to understand the source code of TiffDecoder.java. It will
be easy for me to understand why it was coded like that if I know the
format of tiff header file. So is there anyone to know where I can find
reference to describe the format of Tiff header file as well as header
file format for other image types like JPEG, BMP.

Thanks in advance

[rock fest]

HEY THERE -  HERE IS A LINK TO AN ONLINE VERSION OF THE CLASSIC 'ENCYCLOPEDIA OF GRAPHIC FILE FORMATS'. IT EXPLAINS JUST ABOUT EVERY ASPECT OF EVERY FILE TYPE CURRENT IN THE LATE 90'S W/ COMPRESSION ALGORYTHMS, COLOR PALETTES, HEADERS THE WORKS, W/ DETAILED EXPLANATIONS. http://www.fileformat.info/mirror/egff/index.htm
- ALSO, FROM ELSEWHERE ON THIS SITE, AN EXCITING LINK SPECIFIC TO YOUR REQUEST http://www.libtiff.org/

[Michal Lijowski]

What does it mean if a tag from DICOM file in output from Show Info
is marked by >
e.g.

0020,0032  >Image Position (Patient): +0.000000e+000\+0.000000e+000\
+0.000000e+000
0020,0037  >Image Orientation (Patient): +0.000000e+000\+0.000000e+000\
+0.000000e+000\+0.000000e+000\+0.000000e+000\+0.000000e+000
0054,0200  >Start Angle: 180

  Thanks,

  Michal

[Wayne Rasband]

> What does it mean if a tag from DICOM file in output from
> Show Info is marked by >
> e.g.
>
> 0020,0032  >Image Position (Patient): +0.000000e+000\+0.000000e+000\
> +0.000000e+000
> 0020,0037  >Image Orientation (Patient): +0.000000e+000\+0.000000e+000\
> +0.000000e+000\+0.000000e+000\+0.000000e+000\+0.000000e+000
> 0054,0200  >Start Angle: 180

It means that the tags are part of a sequence. In this example

    0054,0220  View Code Sequence:
    0008,0100  >Code Value: R-10242
    0008,0102  >Coding Scheme Designator: SNM3
    0008,0104  >Code Meaning: cranio-caudal

the Code Value, Code Scheme Designator and Code Meaning tags are in the
View Code Sequence.

-wayne