Note that ReadImages has been orphaned and is under the BSD license, so
you can become maintainer and re-establish the package on CRAN.
Best,
Uwe Ligges
On 25.02.2013 07:50, PIKAL Petr wrote:
Thanks to all.
For the time being due to urgency I will stay with a copy of R 2.15.x with
which ReadImages works. It is simplest solution which I can adopt immediately
without much additional effort.
However I will need to elaborate another solution in future, for which I will
consider various suggested options.
Regards
Petr
From: Greg Snow [mailto:538...@gmail.com]
Sent: Friday, February 22, 2013 5:54 PM
To: PIKAL Petr
Cc: r-help
Subject: Re: [R] package ReadImages
For some of the fancier transforms it may be easier to use an outside tool such
as Imagemagick which will do a lot of these things. There is even a C++
interface to imagemagick that may work nicely with packages like Rcpp if you
don't want to use an intermediate file.
But jobs like converting to grayscale can be very simple using R itself. Many
of the functions that read in images store them as 3 dimensional arrays and you
would just need an apply command to change the 3 values for each pixel to a
grayscale value (see col2gray in the TeachingDemos package for one way to do
this, though loading in the whole package is probably overkill for something
this simple).
On Fri, Feb 22, 2013 at 1:57 AM, PIKAL Petr
<petr.pi...@precheza.cz<mailto:petr.pi...@precheza.cz>> wrote:
Thanks.
I tried EBImage several years ago for another problem, but Bioconductor
packages have some difficulties to install in our network/firewall environment
and I am not in a position to change it. It seems to me also an overkill for
such simple task.
jpeg and png seems to me a bit too much simple, without direct possibility to
transform from rgb to grayscale and normalisation.
Anyway, I will give it a try.
Petr
From: Greg Snow [mailto:538...@gmail.com<mailto:538...@gmail.com>]
Sent: Friday, February 22, 2013 6:45 AM
To: PIKAL Petr
Cc: r-help
Subject: Re: [R] package ReadImages
Some possibilities: The EBImage package on Bioconductor; the jpeg and png
packages read jpeg and png images.
On Thu, Feb 21, 2013 at 8:26 AM, PIKAL Petr
<petr.pi...@precheza.cz<mailto:petr.pi...@precheza.cz>> wrote:
Dear all
I prepared some image processing routine which depended on package ReadImages.
Basically I imported image to R, changed rgb to grayscale, normalised an image
made some selections and changed to image by imagematrix.
Recently I learned that this package was removed from CRAN and can not be used
in R 3.0.0.
What options I have now to import image to R, change it to grayscale, make some
computation or selection, change it back to image and plot for visual
inspection.
Thanks
Petr
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--
Gregory (Greg) L. Snow Ph.D.
538...@gmail.com<mailto:538...@gmail.com>
--
Gregory (Greg) L. Snow Ph.D.
538...@gmail.com<mailto:538...@gmail.com>
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