PCIDEL2 -- Delete Image Channels from Database

Deletes image channels from a PCIDSK database created by CIM (separate image files are used for storing each image channel). Image channels are deleted by modifying the PCIDSK database header and (optionally) deleting the image files.

PARAMETERS

PCIDEL2 is controlled by the following global parameters:

Name     Prompt                                  Count     Type
FILE     Database File Name                      1-64      Char
DELMODE  Delete Image File: YES/NO               1-3       Char
DBIC     Database Input Channel List             1-1024    Int

FILE

Specifies the name of the PCIDSK header file to modify.

 EASI>FILE="filespec"

DELMODE

Specifies whether or not to delete individual image channel files from disk.

 EASI>DELMODE="YES"             | delete image files
 EASI>DELMODE="NO"              | do NOT delete image files

DBIC

Specifies a list of 1 to 1024 image channels to delete from the PCIDSK database. The channel number for a deleted channel can be used again by the PCIADD2 program.

 EASI>DBIC=i,j,k                | list of image channels to delete

Up to 1024 channels can be handled.
Up to 16 integer values can be specified.
Ranges of channels can be specified with negative values. For example, {1,-4,10} is internally expanded to {1,2,3,4,10}.

DETAILS

PCIDEL2 deletes from one to 1024 image channels (DBIC) from a PCIDSK database file (FILE) created by CIM or PCIADD2, where each image channel on the database is stored as a separate image disk file. PCIDEL2 cannot delete image channels created by PCIMOD; use PCIMOD to delete image channels created by PCIMOD. The option to delete the image files can be specified (DELMODE).

If DELMODE="NO", the PCIDSK database is modified so that the specified image channels are marked as deleted in the PCIDSK file header. However, the actual image files containing the image data are NOT deleted from disk.

If DELMODE="YES", the PCIDSK database is modified so that the specified image channels are marked as deleted in the PCIDSK file header, plus the actual image files containing the image data are actually deleted from disk.

PCIDEL2 does NOT change the numbering of existing channels. The channel numbers for deleted image channels are used again if a new image channel is created by PCIADD2. Deleted channels are still listed by CDL, but their channel descriptors are erased.

EXAMPLE

Delete channels 1, 3, and 6 from a 512 by 512 PCIDSK file created by CIM, which already contains six image channels. The image files pertaining to these image channels are deleted from disk.

 EASI>FILE="image.pix"
 EASI>DELMODE="YES"
 EASI>DBIC=1,3,6
 EASI>RUN PCIDEL2

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