From fa080de7afc95aa1c19a6e6fc0e0708ced2eadc4 Mon Sep 17 00:00:00 2001 From: Joseph Hunkeler Date: Wed, 8 Jul 2015 20:46:52 -0400 Subject: Initial commit --- noao/imred/generic/doc/normalize.hlp | 45 ++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 noao/imred/generic/doc/normalize.hlp (limited to 'noao/imred/generic/doc/normalize.hlp') diff --git a/noao/imred/generic/doc/normalize.hlp b/noao/imred/generic/doc/normalize.hlp new file mode 100644 index 00000000..f5fb80f7 --- /dev/null +++ b/noao/imred/generic/doc/normalize.hlp @@ -0,0 +1,45 @@ +.help normalize Sep84 noao.imred.generic +.ih +NAME +normalize -- Normalize images +.ih +USAGE +normalize images +.ih +PARAMETERS +.ls images +Images to be normalized. +.le +.ls norm = INDEF +Normalization factor to be used if not INDEF. If INDEF the normalization +factor is determined by sampling the images. +.le +.ls sample_section = "[]" +Section of the image to be sampled in determining the image mean. +.le +.ls lower = INDEF +Lower limit of pixel values for calculating the normalization. +INDEF corresponds to the minimum possible pixel value. +.le +.ls upper = INDEF +Upper limit of pixel values for calculating the normalization. +INDEF corresponds to the maximum possible pixel value. +.le +.ih +DESCRIPTION +Each of the images is normalized. The normalization is specified by the +parameter \fInorm\fR. If the value of \fInorm\fR is INDEF then a normalization +is determined by sampling the image. The normalization is then the mean +of the pixels in the sample section with values in the range \fIlower\fR +to \fIupper\fR. The default sample section selects all pixels in the image. +The normalized images are of datatype "real" and replace the original images. +.ih +EXAMPLES +To normalize a set of two dimensional images excluding deviant pixels below +1000 and above 5000 and subsampling every fifth pixel in each dimension: + + cl> normalize frame* sample=[*:5,*:5] low=1000 up=5000 +.ih +SEE ALSO +imstatistics, normflat +.endhelp -- cgit