Measuring how far away an object is

[javalor]

Hi,
I need to measure how far something is in front of me using a picture looking towards a landscape. For example, the endzones in a football field is separated by 100 yards, and I want to be able to calculate with a picture how far that other endzone instead of walking the distance. Is this possible? I have see many calculations of distance or lengths when looking down on something, or looking from the top (such as taking a picture of a leaf on the ground and then measuring it's length).
It's application is that I am taking a picture of a mountain range, and I need to be able to calculate how far away certain objects or landmarks are from the spot of the camera.
Thanks so much! Sorry if this is obvious, I am new to ImageJ.

[Cammer, Michael]

If you know the angle of view and how big the object is and there are a few of them in the pic at different depths, then you can calculate the relative distances.  https://www.flickr.com/photos/mcammer/4572576979/

One of the great things about a football field is that there are lines on it that tell you distance.  So if you have a situation like this, then it's a simple problem by using landmarks.
https://www.flickr.com/photos/mcammer/3584237720/

=========================================================================
 Michael Cammer, Microscopy Core & Skirball Institute, NYU Langone Medical Center
                      Cell:  914-309-3270     ** MY OFFICE HAS MOVED TO SKIRBALL 2nd FLOOR, Back right **
          http://ocs.med.nyu.edu/microscopy & http://microscopynotes.com/


-----Original Message-----
From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of javalor
Sent: Tuesday, June 23, 2015 3:01 AM
To: [hidden email]
Subject: Measuring how far away an object is

Hi,
I need to measure how far something is in front of me using a picture looking towards a landscape. For example, the endzones in a football field is separated by 100 yards, and I want to be able to calculate with a picture how far that other endzone instead of walking the distance. Is this possible? I have see many calculations of distance or lengths when looking down on something, or looking from the top (such as taking a picture of a leaf on the ground and then measuring it's length).
It's application is that I am taking a picture of a mountain range, and I need to be able to calculate how far away certain objects or landmarks are from the spot of the camera.
Thanks so much! Sorry if this is obvious, I am new to ImageJ.



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[Chuck Harrison-2]

Jackson, your task falls into the realm of photogrammetry. As far as I know
there are no specific photogrammetric plug-ins for ImageJ. Here are some
starting points for more information.

https://en.wikipedia.org/wiki/Photogrammetry
https://en.wikipedia.org/wiki/Comparison_of_photogrammetry_software

Chuck

On Tue, Jun 23, 2015 at 8:26 AM, Cammer, Michael <[hidden email]
> wrote:

> If you know the angle of view and how big the object is and there are a
> few of them in the pic at different depths, then you can calculate the
> relative distances.  https://www.flickr.com/photos/mcammer/4572576979/
>
> One of the great things about a football field is that there are lines on
> it that tell you distance.  So if you have a situation like this, then it's
> a simple problem by using landmarks.
> https://www.flickr.com/photos/mcammer/3584237720/
>
> =========================================================================
>  Michael Cammer, Microscopy Core & Skirball Institute, NYU Langone Medical
> Center
>                       Cell:  914-309-3270     ** MY OFFICE HAS MOVED TO
> SKIRBALL 2nd FLOOR, Back right **
>           http://ocs.med.nyu.edu/microscopy & http://microscopynotes.com/
>
>
> -----Original Message-----
> From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of
> javalor
> Sent: Tuesday, June 23, 2015 3:01 AM
> To: [hidden email]
> Subject: Measuring how far away an object is
>
> Hi,
> I need to measure how far something is in front of me using a picture
> looking towards a landscape. For example, the endzones in a football field
> is separated by 100 yards, and I want to be able to calculate with a
> picture how far that other endzone instead of walking the distance. Is this
> possible? I have see many calculations of distance or lengths when looking
> down on something, or looking from the top (such as taking a picture of a
> leaf on the ground and then measuring it's length).
> It's application is that I am taking a picture of a mountain range, and I
> need to be able to calculate how far away certain objects or landmarks are
> from the spot of the camera.
> Thanks so much! Sorry if this is obvious, I am new to ImageJ.
>
>
>
> --
> View this message in context:
> http://imagej.1557.x6.nabble.com/Measuring-how-far-away-an-object-is-tp5013251.html
> Sent from the ImageJ mailing list archive at Nabble.com.
>
> --
> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>
> ------------------------------------------------------------
> This email message, including any attachments, is for the sole use of the
> intended recipient(s) and may contain information that is proprietary,
> confidential, and exempt from disclosure under applicable law. Any
> unauthorized review, use, disclosure, or distribution is prohibited. If you
> have received this email in error please notify the sender by return email
> and delete the original message. Please note, the recipient should check
> this email and any attachments for the presence of viruses. The
> organization accepts no liability for any damage caused by any virus
> transmitted by this email.
> =================================
>
> --
> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>

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