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Re: jpegs and tiffs [message #57792 is a reply to message #57789]

Thu, 27 December 2007 13:00

Josh
Messages: 21
Registered: June 2007

Junior Member

> Well, I don't think there are *really* two black sine
> waves in the JPEG file. I think one of them is very dark
> blue and the other is black. But, you are right, it is
> not as blue as it is in the TIFF file. I think this is
> probably because of the "lossy" nature of JPEG files.
> I would try setting the QUALITY keyword on the WRITE_JPEG
> command to 100 and see if that doesn't help some.
>
> In any case, if you choose a RED color, you will see that
> you are getting differences in your two lines. :-)

This makes sense -- unfortunately neither solution worked. I tried
both
quality=100 and RED='0000FF'XL (as well as both at the same time) and
I always
get two apparently black lines in the jpeg, but a colored line in the
tiff.
When I try LTGRAY='CCCCCC'XL, the jpeg does show the line as being
light
gray. It seems that the jpeg understands grayscale.

J

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[Message index]

		Re: jpegs and tiffs By: David Fanning on Thu, 27 December 2007 13:08
		Re: jpegs and tiffs By: Josh on Thu, 27 December 2007 13:00
		Re: jpegs and tiffs By: David Fanning on Mon, 24 December 2007 18:36

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