comp.lang.idl-pvwave archive: archive » Histogram Hot-shots Required

Home » Public Forums » archive » Histogram Hot-shots Required

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Histogram Hot-shots Required [message #16347 is a reply to message #16297]

Tue, 20 July 1999 00:00

Martin Downing
Messages: 136
Registered: September 1998

Senior Member

Liam Gumley <Liam.Gumley@ssec.wisc.edu> wrote in message
news:378F33E4.984726C5@ssec.wisc.edu...
> Assuming I know the minimum and maximum values (the range) used in
> creating the histogram, the histogram binsize, and the number of bins,
> the zero-based bin index is given by
>
> bin_index = long(float(pixel_value - histogram_min_value) /
> float(binsize))
>
> and then to protect against pixel values LT histogram minimum value, or
> GE histogram maximum value
>
> bin_index = (bin_index > 0L) < (number_of_bins - 1L)
>

I agree with the first part, but HISTOGRAM ignores values outside the
specified range, so you would want to check the index and throw away if LT 0
or GE "num_bins"

Martin

Report message to a moderator

[Message index]

		Histogram Hot-shots Required By: davidf on Thu, 15 July 1999 00:00
		Re: Histogram Hot-shots Required By: Liam Gumley on Tue, 20 July 1999 00:00
		Re: Histogram Hot-shots Required By: Martin Downing on Tue, 20 July 1999 00:00
		There is NO TRUTH! Re: Histogram Hot-shots Required By: davidf on Mon, 19 July 1999 00:00
		Re: There is NO TRUTH! Re: Histogram Hot-shots Required By: davidf on Wed, 21 July 1999 00:00
		Re: There is NO TRUTH! Re: Histogram Hot-shots Required By: gabriel rodriguez ibe on Wed, 21 July 1999 00:00
		Re: Histogram Hot-shots Required By: davidf on Mon, 19 July 1999 00:00
		Re: Histogram Hot-shots Required By: eddie haskell on Fri, 16 July 1999 00:00

Previous Topic:	Re: Contour `wrapping' problem
Next Topic:	Re: Compile Problem with IDL5.2

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sun Oct 12 16:55:14 PDT 2025

Total time taken to generate the page: 1.60137 seconds