Article View: comp.soft-sys.khoros
Article #1027Re: how to read/write individual pixels
From: Mathew Yeates
Date: Wed, 06 Jan 1993 16:46
Date: Wed, 06 Jan 1993 16:46
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fsistler@gumbo.age.lsu.edu (Fred Sistler) writes: >-- >I am new to Khoros and need to perform some low-level image >processing functions - specifically reading and writing grey levels of >individual pixels. Any suggestions on how to do that? >I appreciate any help you will offer. You can extract a single pixel from an image with vextract and then print the value with vprdata. To write, you can insert a 1x1 image created with vgconst any place in the image. This is going to be quite inefficient if you need to alter many pixels. In this case, your better off writing a new routine. As you probably know, on-line documentation is available for these routines with vman, e.g. vman vinsert. -Mathew |**********************************************************| | Mathew Yeates JPL/Image Analysis Systems Group | | mathew@henry.jpl.nasa.gov | | (818) 354-3008 | | Will Program For Food | |**********************************************************| -- |**********************************************************| | Mathew Yeates JPL/Image Analysis Systems Group | | mathew@henry.jpl.nasa.gov | | (818) 354-3008 |
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Newsgroups: comp.soft-sys.khoros Path: arc1-ca.pugleaf.net!sparky!uunet!haven.umd.edu!darwin.sura.net!zaphod.mps.ohio-state.edu!sdd.hp.com!elroy.jpl.nasa.gov!henry!mathew From: mathew@elroy.Jpl.Nasa.Gov (Mathew Yeates) Subject: Re: how to read/write individual pixels Message-ID: <mathew.726338819@henry> Keywords: pixels grey level Sender: news@elroy.jpl.nasa.gov (Usenet) Nntp-Posting-Host: henry.jpl.nasa.gov Organization: Image Analysis Systems Group, JPL References: <1993Jan6.154330.24157@cs.tulane.edu> Date: Wed, 6 Jan 1993 16:46:59 GMT Lines: 33