Re: Near True

From	moroney@world.std.spaamtrap.com (Michael Moroney)
Newsgroups	alt.astronomy, sci.physics
Subject	Re: Near True
Date	2015-07-14 02:51 +0000
Organization	The World : www.TheWorld.com : Since 1989
Message-ID	<mo1tf4$b19$1@pcls7.std.com> (permalink)
References	(3 earlier) <55A082C3.2BF9@ix.netcom.com> <e95ceb04-ff0a-4191-bb9d-2f4d9aa188b4@googlegroups.com> <55A34275.701F@ix.netcom.com> <mo15cf$3sh$1@pcls7.std.com> <55A4415A.78A4@ix.netcom.com>

Cross-posted to 2 groups.

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The Starmaker <starmaker@ix.netcom.com> writes:

>Michael Moroney wrote:
>> 
>> How NASA uses the term:
>> 
>> http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question20.html
>> 
>> Also see https://en.wikipedia.org/wiki/False_color

>Okay, yours user-edited website reads:

>A false-color image is an image that depicts an object in colors that 
>differ from those a photograph (a "true-color" image) would show.

That's all you need to know.

Think of an old-time color photograph negative.  That's a false color
image, but one from which a true color image can be recreated.
A black-and-white photograph is also false color.

Sometimes false color is the only way to do it.  Like a photo in the
infrared or ultraviolet.  You *must* use false color for that, what would
a true-color infrared photograph look like?

IR and UV can show details not visible in visible light.  Ever see a photo
of flowers in the ultraviolet, the way a bee would see it?  Can't do it
without false color.  I have a false color aerial photograph of where I
live from 20 years ago.  It's in infrared and visible light.  Infrared is
shown as red.  Healthy vegetation (farm fields, golf courses etc.) show up
as bright red as healthy vegetation reflects IR very well.  Not so healthy
vegetation as dull red or pinkish.  It shows the health in much more
detail than just looking at it, as both look green.

>I don't see any difference....it's still 'meant to deceive, incorrect, 
>not according with truth or fact.'

How can it be meant to deceive if they explicitly say it's false color?
Esp. when they explicitly give color mapping, like my USGS false color
photograph?  It says that infrared appears as red, red as green and green
as blue, as well as giving the actual wavelengths.

Thread

Near True The Starmaker <starmaker@ix.netcom.com> - 2015-06-21 13:11 -0700
  Re: Near True Arc Michael <abookoflife@yahoo.com> - 2015-06-21 15:04 -0700
    Re: Near True David Staup <dstaup@charter.net> - 2015-06-21 19:19 -0500
  Re: Near True The Starmaker <starmaker@ix.netcom.com> - 2015-07-05 19:01 -0700
    Re: Near True Saul Levy <saullevy1@cox.net> - 2015-07-06 14:37 -0700
    Re: Near True The Starmaker <starmaker@ix.netcom.com> - 2015-07-07 20:22 -0700
      Re: Near True Saul Levy <saullevy1@cox.net> - 2015-07-08 12:47 -0700
        Re: Near True The Starmaker <starmaker@ix.netcom.com> - 2015-07-08 14:26 -0700
      Re: Near True The Starmaker <starmaker@ix.netcom.com> - 2015-07-09 10:52 -0700
        Re: Near True Saul Levy <saullevy1@cox.net> - 2015-07-09 15:03 -0700
        Re: Near True palsing <pnalsing@gmail.com> - 2015-07-09 19:10 -0700
          Re: Near True Saul Levy <saullevy1@cox.net> - 2015-07-10 06:36 -0700
        Re: Near True Simoen <invalid@invalid.com> - 2015-07-10 22:41 -0500
      Re: Near True Arc Michael <abookoflife@yahoo.com> - 2015-07-13 13:36 -0700
        Re: Near True The Starmaker <starmaker@ix.netcom.com> - 2015-07-13 23:10 -0700
          Re: Near True benj <nobody@gmail.com> - 2015-07-14 03:00 -0400
            Re: Near True Simoen <invalid@invalid.com> - 2015-07-14 11:34 -0500
        Re: Near True Saul Levy <saullevy1@cox.net> - 2015-07-14 10:04 -0700
          Re: Near True "Notroll2015" <notroll2015@charter.net> - 2015-07-14 12:17 -0500
  Re: Near True Simoen <invalid@invalid.com> - 2015-07-08 00:21 -0500
  Re: Near True The Starmaker <starmaker@ix.netcom.com> - 2015-07-10 19:41 -0700
    Re: Near True The Starmaker <starmaker@ix.netcom.com> - 2015-07-10 19:43 -0700
      Re: Near True The Starmaker <starmaker@ix.netcom.com> - 2015-07-12 21:45 -0700
        Re: Near True The Starmaker <starmaker@ix.netcom.com> - 2015-07-13 12:11 -0700
        Re: Near True moroney@world.std.spaamtrap.com (Michael Moroney) - 2015-07-13 20:00 +0000
          Re: Near True The Starmaker <starmaker@ix.netcom.com> - 2015-07-13 15:53 -0700
            Re: Near True moroney@world.std.spaamtrap.com (Michael Moroney) - 2015-07-14 02:51 +0000
              Re: Near True The Starmaker <starmaker@ix.netcom.com> - 2015-07-13 22:48 -0700
                Re: Near True moroney@world.std.spaamtrap.com (Michael Moroney) - 2015-07-14 15:28 +0000
                Re: Near True Simoen <invalid@invalid.com> - 2015-07-14 10:47 -0500
                Re: Near True The Starmaker <starmaker@ix.netcom.com> - 2015-07-14 10:34 -0700
                Re: Near True HVAC <Mr.HVAC@gmail.com> - 2015-07-16 07:14 -0400
            Re: Near True The Starmaker <starmaker@ix.netcom.com> - 2015-07-24 13:55 -0700
              Re: Near True The Starmaker <starmaker@ix.netcom.com> - 2015-07-26 20:52 -0700
                Re: Near True The Starmaker <starmaker@ix.netcom.com> - 2015-07-29 11:48 -0700
              Near True2 The Starmaker <starmaker@ix.netcom.com> - 2015-08-01 23:54 -0700
                Re: Near True2 The Starmaker <starmaker@ix.netcom.com> - 2015-08-02 00:57 -0700
                Re: Near True2 Saul Levy <saullevy1@cox.net> - 2015-08-02 04:36 -0700
                Re: Near True2 The Starmaker <starmaker@ix.netcom.com> - 2015-08-02 12:37 -0700
                Re: Near True2 The Starmaker <starmaker@ix.netcom.com> - 2015-08-02 14:04 -0700
                Re: Near True2 The Starmaker <starmaker@ix.netcom.com> - 2015-08-02 17:35 -0700
                Re: Near True2 Saul Levy <saullevy1@cox.net> - 2015-08-02 04:39 -0700
  Re: Near True Simoen <invalid@invalid.com> - 2015-07-10 22:37 -0500

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