| Re: Animations to Tape [message #3640] |
Wed, 08 February 1995 19:32 |
sbarrkum
Messages: 5
Registered: August 1994
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Junior Member |
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I did get a coouple of responses about the scheme to make movie loops.
Hence the postiong. The method does not use IDL. In my case I used IDL
to generate the Images.
I have given below the appendix of an extended abstract we presented.
The beauty of the scheme is you the number of frames you want to transfer
onto video is not limited by your memory, and you can work around the
disk space limitation.
Equipment Needed: A Macintosh AV (Mac AV's give video output)
- If not a Mac AV a Mac and a scan convertor (You get reasonably cheap
one ($300-500) with decent output.
PC Adressable VCR- Typically Biologists and medical personell have one.
NIH Image: A public Domain Image processing software for the Mac. There
isnt anything near anywhere near this for PC's. Lots thanks to
Wayne Rasband for this wonderful package. It available for FTP at
zippy.nimh.nih.gov
The scheme is essentialy.
Generate the images needed. Name the images in sequence.
Connect the Mac Video Output - (Scan Convertor) - TV- VCR
Connect the Mac Serial Port to VCR serial port.
Open each image into NIH image using the macro given below.
Send message to VCR to start recording.
Send Message to VCR to stop recording
Reload another image
Repeat above until all images transferred.
If more more images needed than you have disk space, delete image.
Generate the next set of images. Do not advance or turn of VCR during this
time.
Repeat process given above.
Hope this scheme helps
===========================================================
Subramaniam, A. & Barr-Kumarakulasinghe, S. A. (1994) Video Depicting
Temperature Profiles in the Long Island Sound. Long Island Sound
Conference, Stony Brook, NY
Appendix 1
Images were transferred onto videotape using a Macintosh840 AV and
a NEC820 PC controllable VCR. Images were saved in (Tagged image
file format) TIFF format and named in sequential order. The screen
output of the Macintosh was sent into the VCR and a TV monitor using the
TV output capabilities of the Macintosh AV. The VCR was controlled
through the serial port. A macro (given below) was written in NIH image
to open each file, place the image in photo mode (sans menu bars etc.),
instruct the VCR to start recording and stop recording after one second;
then close image and load the next image.
macro 'FileToVCR';
var
linefeed,return,r,c,p,s,t,crlf,rc, ps,st,file:string;
i:integer;
begin
r:=chr(82);
c:=chr(67);
p:=chr(80);
s:=chr(83);
t:=chr(84);
linefeed:=chr(10); {signal for linefeed}
return:=chr(13); {signal for carraige return}
crlf:=concat(return,linefeed); {signal for carraige return/linefeed}
rc:=concat(r,c,crlf); {signal for start recording}
ps:=concat(p,s,crlf); {signal for pause}
st:=concat(s,t,crlf); {signal for pause}
RequiresVersion(1.48);
OpenSerial('1200 baud,no parity,eight data,one stop');
for i:=0 to 29 do begin
SetImport('TIFF');
Import('image.', i:3); {import images named 'image001' }
Photomode(true);
PutSerial(rc); {record}
Wait(4);
PutSerial(st); {stop recording}
Wait(3);
Photomode(false);
close;
Beep;
end;
end;
--
____________________________________________________________ ________
| Sereno A. Barr-Kumarakulasinghe | sbarrkum@ic.sunysb.edu |
| Marine Sciences Research Center | |
| State University of New York | |
| Stony Brook, NY 11794-5000 | |
|___________________________________________________________ ________ |
|
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