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Re: X-axis value from histogram [message #30846]

Mon, 20 May 2002 14:11

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Bhuvan (new2idl@yahoo.com) writes:

> I plot a histogram of an image as:
>
> hist = histogram(image, min = 0)
> plot, hist
>
> Now, i want to know the grey scale value plotted along the X-axis with
> respect to the peak values in the histogram.

I should think that is pretty much the point of a Histogram
plot.

You can see my rendition of this with the HistoImage program
from my book:

http://www.dfanning.com/misc/histoimage.pro

You will need my TVImage and Colorbar programs, too:

http://www.dfanning.com/programs/tvimage.pro
http://www.dfanning.com/programs/colorbar.pro

Run the program like this:

IDL> Histoimage, image

Cheers,

David
--
David W. Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155

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