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| author | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2020-12-12 02:21:56 +0000 |
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| committer | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2020-12-12 02:21:56 +0000 |
| commit | f80c0f70f4ad013f09458728404296f8c814ff6c (patch) | |
| tree | 0b6fe1a5be677c05ee09e911a4fcfee078d3f310 | |
| parent | 3e3becba38aae40963fa71988a5b998351619752 (diff) | |
| download | netpbm-mirror-f80c0f70f4ad013f09458728404296f8c814ff6c.tar.gz netpbm-mirror-f80c0f70f4ad013f09458728404296f8c814ff6c.tar.xz netpbm-mirror-f80c0f70f4ad013f09458728404296f8c814ff6c.zip | |
miscellaneous update
git-svn-id: http://svn.code.sf.net/p/netpbm/code/userguide@4001 9d0c8265-081b-0410-96cb-a4ca84ce46f8
| -rw-r--r-- | pamaddnoise.html | 10 | ||||
| -rw-r--r-- | pamtris.html | 5 |
2 files changed, 10 insertions, 5 deletions
diff --git a/pamaddnoise.html b/pamaddnoise.html index 8e786e6a..df27204b 100644 --- a/pamaddnoise.html +++ b/pamaddnoise.html @@ -2,7 +2,7 @@ <html><head><title>Pamaddnoise User Manual</title></head> <body> <h1>pamaddnoise</h1> -Updated: 14 November 1995 +Updated: 12 December 2020 <br> <a href="#index">Table Of Contents</a> @@ -98,7 +98,13 @@ command line options: <dl compact> <dt><b>-lambda</b> <i>value</i> -<dd>Used for poisson noise only. The default value is 0.05. +<dd>This is the expected value of the Poisson distribution for a sample value + of mximum intensity. The expected value for other intensities is + proportional; e.g. for half intensity, it is half this value. + +<p>This is meaningful only with <b>-type=poisson</b>. + +<p>The default value is 12. <dt><b>-lsigma</b> <i>value</i> diff --git a/pamtris.html b/pamtris.html index 8538e5b3..77bd4a3d 100644 --- a/pamtris.html +++ b/pamtris.html @@ -327,8 +327,7 @@ int main(void) <p>Below are two other examples which demonstrate what else can be feasibly obtained through this meta-programming approach, especially when combining <b>pamtris</b> with other Netpbm programs (Earth texture from -<a href="https://visibleearth.nasa.gov/view.php?id=73580" target="_tab"> -nasa.gov</a>): +<a href="https://visibleearth.nasa.gov/view.php?id=73580">nasa.gov</a>): <p> <img alt="Isometric Rainbow Waves" src="pamtris_isowaves.gif"> @@ -603,7 +602,7 @@ otherwise the output images might look very wrong. <i>w</i> was new in Netpbm 10.85 (December 2018). <p>Consider the -<a href="https://en.wikipedia.org/wiki/Viewing_frustum" target="_tab"> +<a href="https://en.wikipedia.org/wiki/Viewing_frustum"> typical model</a> of the so-called "viewing frustum" used to project vertices in 3D "world space" onto a planar "image space." If we adopt the convention that a "z-plane" means any plane parallel to the view-plane (a.k.a. picture |