Hi there
I'm looking for a function to read PNG-bitmap-images from a file into R.
I only found:
- the pixmap-package which cannot import png or similar formats
- the rimage-package which can only import lossy jpeg-images (the
convertion from png to jpeg modifies the data!)
Is there any
' , 'write.png',
and 'write.jpeg' functions?
Jarek Tuszynski
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Sydler, Dominik
Sent: Monday, November 21, 2005 5:36 AM
To: r-help@stat.math.ethz.ch
Subject: [R] PNG-import into R
Hi there
I'm looking for a function
Tuszynski, Jaroslaw W. wrote:
Also does anybody know how hard would it be to tap into C code needed for
'read.jpeg', 'png' and 'jpeg' functions to write 'read.png' , 'write.png',
and 'write.jpeg' functions?
Much, much harder than using ImageMagick to convert to one of the
formats that R
Hi,
I dont think you can import PNG images into R directly (although I may
be wrong). I use ImageMagick (available for most operating systems) and
the system() function to do my image conversions.
convertImage-function(dirname,srcname,targetname){
strSrcName-shQuote(paste(dirname,srcname,sep
On Mon, 2005-11-21 at 09:38 -0500, Tuszynski, Jaroslaw W. wrote:
Also does anybody know how hard would it be to tap into C code needed for
'read.jpeg', 'png' and 'jpeg' functions to write 'read.png' , 'write.png',
and 'write.jpeg' functions?
Not too difficult (at least with libpng).
I was
Rajarshi Guha wrote:
Right now it segfaults, so its not really useful yet.
Can I use that as a tag line?
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On Mon, 21 Nov 2005, Sydler, Dominik wrote:
Hi there
I'm looking for a function to read PNG-bitmap-images from a file into R.
I only found:
- the pixmap-package which cannot import png or similar formats
- the rimage-package which can only import lossy jpeg-images (the
convertion from
