Re: [R] Is it possible to read jpeg files into R?

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From: Wolski (wolski@molgen.mpg.de)
Date: Thu 27 May 2004 - 22:08:06 EST


Message-id: <200405271408060804.0147348C@mail.math.fu-berlin.de>

Hallo Jonathan!
help.search("jpeg") is R users friend.

#search result.
Help files with alias or concept or title matching 'jpeg' using
regular expression matching:
f.plot.ica.fmri.jpg(AnalyzeFMRI)
                        Plot the components of the ouput of f.ica.fmri
                        to a series of jpeg files
bmp(graphics) BMP, JPEG and PNG graphics devices
cat.picture(rimage) JPEG picture of a cat
read.jpeg(rimage) Read JPEG file
Type 'help(FOO, package = PKG)' to inspect entry 'FOO(PKG) TITLE'.

library(rimage)
> ?read.jpeg

     This function reads a jpeg image file and return an imagematrix
     object.

Sincerely

*********** REPLY SEPARATOR ***********

On 5/27/2004 at 1:21 PM Jonathan Williams wrote:

>Hi Helpers,
>Does anyone know how to read jpeg, bmp or png files into R?
>I have some photos of brain scans and I want to quantify
>some aspects of their size. I might be able to do this
>with the 'locator' function, if I could figure out how
>to read the files in and make them into an image that
>I can display on the R Windows device. I have experimented
>with readBin, using a simple black-and-white line graph,
>but the numeric result appears to be much too complex for
>a simple line graph and I cannot see how to use image or
>contour to re-create the original jpeg image. Is there an
>R routine to do this?
>
>Thanks, in advance, for your help,
>
>Jonathan Williams
>OPTIMA
>Radcliffe Infirmary
>Woodstock Road
>OXFORD OX2 6HE
>Tel +1865 (2)24356
>
>______________________________________________
>R-help@stat.math.ethz.ch mailing list
>https://www.stat.math.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html

Dipl. bio-chem. Eryk Witold Wolski @ MPI-Moleculare Genetic
Ihnestrasse 63-73 14195 Berlin 'v'
tel: 0049-30-83875219 / \
mail: wolski@molgen.mpg.de ---W-W---- http://www.molgen.mpg.de/~wolski

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