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idl gif files and display by dos viewer [message #4153]

Wed, 10 May 1995 00:00

brooker
Messages: 12
Registered: March 1994

Junior Member

I have a frame grabber card and a black and white camera. The frame grabber
digitizes an image to 8 bits and saves to a binary file that I read with the
following commands:

a=bytarr(320,240)
openr,lun,'image1.img',/get_lun
readu,lun,a

This image looks fine when I type: tv,a

I now want to save to a GIF file so that I can view the image on a PC
using the DOS viewer QPEG. IDL can do this by using the command:

write_gif,a,'image1.gif'

This seems to work fine because when I type the commands

read_gif,'image1.gif',b
tv,b

the image looks like the original.

The problem is that when I look at the same GIF file on a PC with the
DOS viewer QPEG, it looks terrible. The image is still there but now it
is mostly white.

Has anybody else ever had this problem??

Thanks-Peter Brooker

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[Message index]

		idl gif files and display by dos viewer By: brooker on Wed, 10 May 1995 00:00
		Re: idl gif files and display by dos viewer By: Fergus Gallagher on Fri, 12 May 1995 00:00
		Re: idl gif files and display by dos viewer By: brooker on Fri, 12 May 1995 00:00
		Re: idl gif files and display by dos viewer By: pellet on Fri, 12 May 1995 00:00
		Re: idl gif files and display by dos viewer By: afl on Wed, 10 May 1995 00:00

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