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TR DISK - Tape Read--Perkin Elmer disk format

(10/20/94)

PURPOSE

Converts Perkin Elmer densitometer disk files into SPIDER image files.

USAGE

.OPERATION: TR DISK

.SCAN INPUT FILE: IMAGE0001
[Enter file name. Each image scanned by the densitometer is contained in two files. Both have the name of the identification specified in SCANSALOT with 4 digits added to it. Example: If the identification was "image", then you need to have two files: image0001.img and image0001.hdr in the same directory. This program looks up in image0001.hdr to find the file dimensions and the scanning direction. This information is then used to convert image0001.img into a SPIDER image file.]

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

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

If "T" was answered, the system asks:

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

.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 converts only files that were originally written onto disk by the PDS software. If the file was originally written to tape by the PDS software, use TR TDISK for conversion.

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

SUBROUTINES

COPYPDS

CALLER

TAPE1

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