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TR TDISK - Tape Read--Perkin Elmer format

(12/18/89)

PURPOSE

Converts Perkin Elmer file that was copied from tape onto disk into SPIDER format.

USAGE

.OPERATION: TR TDISK

.SCAN INPUT FILE: FILE1.SCN
[Enter file name including extension (max. 40 characters)]

.(L)IST RECORD HEADINGS,(S)KIP RECORDS,(G)O ON: L
[Enter L for listing of record headers, S if a number of records from the input file should be skipped, G if conversion should continue without skipping.]

If the answer was "L" or "S" the following quesiton appears:

.NUMBER OF RECORDS TO LIST/SKIP: 10
[Enter number of records to list or skip. With option L the headers of the specified records are listed and the program returns to the OPERATION prompt, otherwise it continues normally.]

.OVERWRITE NSAM <RET=NO>: <RET>
[Allows you to overwrite NSAM if something went wrong during scanning]

.OUTPUT FILE: SPI001
[Enter output file name (use SPIDER conventions)]

.(D)ENSITY, (T)RANSMISSION: D
[If image was digitized in density mode, enter "D" , otherwise enter "T" and the program will convert the transmission values into densities]

If "T" was answered, the program asks:

.ENTER GAIN FACTOR: 5
[Default value is 1. If the microdensitometer was calibrated according to the description in the manual (1988), the gain value is 5]

.HOW MANY LINES (0=ALL): 0
[Specify number of lines to be read (starts at line 1)]

If reduction option is used:

.REDUCTION FACTOR (0 IF NO RED.): 4
[Enter integer reduction factor. The program averages over aXa pixels (a=reduction factor), if you do not want to have any reduction, enter 1.]

NOTES

  1. This operation only converts files, that were originally written onto tape by the PDS software. To get the image onto disk the tape has to be mounted /FOREIGN, with a sufficiently large blocksize. Then use e.g. COPY MSA0: SCANFILE1.OUT to copy the tape data onto disk.

  2. The output file will occupy twice as much disk space as the input file.

SUBROUTINES

COPYMDTR

CALLER

TAPE1

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