Re: NIR botany images

Posted by Bill Christens-Barry on Jun 26, 2007; 5:39pm
URL: http://imagej.273.s1.nabble.com/NIR-botany-images-tp3698985p3698987.html

The Principal Component Analysis plugin from the BIJ group, found at:

    http://webscreen.ophth.uiowa.edu/bij/pca.htm

may be useful for this. Principal Component Analysis (PCA) is apt for sussing out spectral
"fingerprints" of different objects in a set of images differing in their acquisition wavelengths.

Also, the DStretch plugin from Jon Harman, available at:

    http://www.dstretch.com/index.html

is really nice for making subtle differences more visible.

If you could describe the camera, spectral bands, and imaging conditions more fully, I might have
some feedback on IR wavelength bands.

Bill Christens-Barry


On Tue, 26 Jun 2007 09:01:50 -0700, TERA EPA <[hidden email]> wrote:

>Hello,
>We're working on a global warming study with 12 different plots of prairie
>plants on which we have taken pictures. The pictures and plants are analyzed
>using ImageJ. We have recently purchased a camera that is modified to be
>more sensitive to near infrared (NIR) as well as filters that narrow the
>range of wavelengths visible. We plan on using ImageJ to analyze these
>images taken with this new camera. We want to look at the different plants
>on an individual species basis, based on each plant's unique spectral
>reflectance. We want ImageJ to pickout these differences, is ImageJ capable?
>If so, are there plug-ins already written for this type of thing? What are
>the capabilities of ImageJ in regard to NIR?
>
>We would really appreciate any help/advice that this listserv can provide.
>Thank you,
>TERA (Terrestrial Ecosystem Research Associates)