MVM -- MDA Tape to Video Transfer
Transfers image data from an AES MDA Resampled (AVHRR) magnetic tape
to the video display.
PARAMETERS
MVM is controlled by the following global parameters:
Name Prompt Count Type
MTIC Mag Tape Input Channel List 1-5 Int
VDOC Video Output Channel List 1-5 Int
MTIW Mag Tape Input Window 0-4 Int
VDOW Video Output Window 0-4 Int
MTSZ Mag Tape Size (Pixels,Lines) 2 Int
STARTFIL Start File on Tape 1 Int
MTIC
MTIC represents the list of image channels to be read from the input
magnetic tape.
EASI>MTIC=i,j,...m | integers, 1-5
- Only the channels specified in MTIC are used by MVM.
- Up to 5 channels can be handled.
- Ranges of channels can be specified with negative values. For
example: {1,-3,5} is internally expanded to {1,2,3,5}.
VDOC
VDOC represents the list of output image channels to be displayed on
a video display. The number of channels in this list depends on the
number of channels in the mag tape input channel (MTIC) list as well
as the configuration of your system.
EASI>VDOC=i,j,...m | integers, 1-?
- Up to 5 video output channels can be handled.
- Ranges of channels can be specified with negative values. For
example: {1,-3,5} is internally expanded to {1,2,3,5}.
MTIW
MTIW specifies the image dimensions to read from the mag tape image
file.
EASI>MTIW=Xoffset,Yoffset,Xsize,Ysize
EASI>MTIW= | defaults to entire image
Integers, offset + size must not exceed the image size.
VDOW
VDOW specifies the image dimensions in the output video display for
receiving the mag tape imagery.
EASI>VDOW=Xoffset,Yoffset,Xsize,Ysize
EASI>VDOW= | defaults to entire image
Integers, offset + size must not exceed the image size.
MTSZ
MTSZ specifies the image channel size on the magnetic tape. The
first element is the number of pixels per scanline. The second
element is the number of scanlines in the image channel.
EASI>MTSZ=i,j
STARTFIL
Specifies the start file number on tape from which to start reading
header and image data. If STARTFIL is greater than one, the program
rewinds the tape and advances to the specified file. STARTFIL must
be set to the file number required by MSH program to print tape
header report.
EASI>STARTFIL=1 | read first file on tape
EASI>STARTFIL=n | read nth file on tape
DETAILS
MVM transfers image data from any set of bands on MDA resampled tape
(MTIC) to any set of image planes on a video display (VDOC).
Any arbitrary rectangular window on tape (MTIW) can be transferred
to any arbitrary rectangular window on the display (VDOW). Shrinking
and/or zooming is automatically performed. By default, the whole
tape image is transferred filling the entire display.
The mag tape image size (MTSZ) must be explicitly specified. Only
two sizes are allowed at present:
MTSZ = 640,600 (large size)
MTSZ = 320,160 (small size)
Any file (image) on tape (STARTFIL) can be specified. MVM will
rewind and then advance to the selected file before transferring.
A TAPE MUST BE MOUNTED ON THE TAPE DRIVE BEFORE MVM CAN BE RUN.
CLEANING THE TAPE HEADS IS RECOMMENDED TO MINIMIZE THE CHANCE OF
TAPE READ ERRORS.
EXAMPLE
EASI>MTIC=1,2,3,4,5
EASI>VDOC=1,2,3,4,5
EASI>MTIW=0,0,512,512
EASI>VDOW=MTIW
EASI>MTSZ=640,600
EASI>STARTFIL=1
EASI>RUN MVM
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