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Re: finding info from .TIF file

Posted by Jean-Philippe Grossier on Feb 04, 2014; 11:20am
URL: http://imagej.273.s1.nabble.com/finding-info-from-TIF-file-tp5006375p5006393.html

Hi,


To get the formula do what Curtis said but only on the green and the red
part of the RGB images:

1) click: Image>Color>Split Channels on your image and the original one.
2) Convert the green and red images to 32-bit
3) subtract green images using the Image Calculator command and do the same
with the red ones.

and you get 2 weird formula (there is nothing in the blue channel).

cheers,

Jean-Philippe


2014-02-03 Willem Stevens <[hidden email]>:

> Hi Curtis,
>
> It looks like this is what I am looking for, it is a kind of formula that
> is used often,
> I will try to make it more visible, but once again, my skills for this kind
> of stuf are terrible.
>
> But thank for so far.
>
>
> 2014-02-03 Curtis Rueden <[hidden email]>:
>
> > Hi Willem,
> >
> > > for a riddle I need to find some information out of an TIF file.
> >
> > Well, there is definitely something hidden in the picture. If you
> download
> > the original wallpaper from:
> >
> >
> >
> http://www.entertainmentwallpaper.com/images/desktops/movie/up_in_the_air02.jpg
> >
> > Then subtract the two using the Image Calculator command (in Process
> menu)
> > you'll see:
> >   http://curtis.imagej.net/Up_in_the_air-diff.tif
> >
> > But clearly some transformation or other is needed to make it appear as
> > intended.
> >
> > Good luck,
> > Curtis
> >
> >
> > On Mon, Feb 3, 2014 at 4:24 AM, Willem D Stevens <[hidden email]
> > >wrote:
> >
> > > I Am a newbie in imaging but for a riddle I need to find some
> information
> > > out of an TIF file.
> > > I tried all the basic options using IMAGEJ but did not found what I was
> > > looking for.
> > >
> > > This is the link to the image:
> > > http://nijhuis.me/Geocaching/Up_in_the_air.tif
> > >
> > >
> > > I need to find X.XXX and Y.YYY
> > > Note.  The value of X.XXX must be between 4300 and 7800
> > >            The value of Y.YYY  must be between 0000 and 2900.
> > >
> > > I hope someone can give me some useful advise.
> > >
> > > --
> > > ImageJ mailing list: http://imagej.nih.gov/ij/list.html
> > >
> >
> > --
> > ImageJ mailing list: http://imagej.nih.gov/ij/list.html
> >
>
> --
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>

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