McIDAS Programmer's Manual
Version 2003
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*.ET
Enhancement save files, where * is a user-defined file name.
Enhancement save files are binary files, each containing an 817-word (3268-byte) table. Words 2 through 768 contain the red, green and blue color intensities for each of the possible 256 brightness values. The individual intensities have a physical range of 0 to 255, where 0 is the minimum and 255 is the maximum intensity.
Word allocation
|
Word
|
Description
|
|
0
|
reserved for system use
|
|
1
|
red color intensity for an image brightness of 0
|
|
2
|
red color intensity for an image brightness of 1
|
|
3
|
red color intensity for an image brightness of 2
|
|
...
|
...
|
|
256
|
red color intensity for an image brightness of 255
|
|
257
|
green color intensity for an image brightness of 0
|
|
258
|
green color intensity for an image brightness of 1
|
|
259
|
green color intensity for an image brightness of 2
|
|
...
|
...
|
|
512
|
green color intensity for an image brightness of 255
|
|
513
|
blue color intensity for an image brightness of 0
|
|
514
|
blue color intensity for an image brightness of 1
|
|
515
|
blue color intensity for an image brightness of 2
|
|
...
|
...
|
|
768
|
blue color intensity for an image brightness of 255
|
|
769-816
|
reserved
|
API functions
Currently, no API library functions exist for reading or writing enhancement save files.
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