On Tue May20'25 12:15:41AM, Ranjan Maitra via R-help wrote: > From: Ranjan Maitra via R-help <r-help@r-project.org> > Date: Tue, 20 May 2025 00:15:41 -0500 > To: r-help@r-project.org > Reply-To: Ranjan Maitra <mlmai...@gmx.com> > Subject: Re: [R] how to read a PSB file in R? > > On Tue May20'25 05:56:59AM, Rui Barradas wrote: > > From: Rui Barradas <ruipbarra...@sapo.pt> > > Date: Tue, 20 May 2025 05:56:59 +0100 > > To: Ranjan Maitra <mlmai...@gmx.com>, r-help@r-project.org > > Subject: Re: [R] how to read a PSB file in R? > > > > Às 03:17 de 20/05/2025, Ranjan Maitra via R-help escreveu: > > > I have come across this file (warning, massive, 4.3 GB) > > > https://esahubble.org/media/archives/images/original/heic1502a.psb and it > > > appears to be a filetype I was not aware of previously. > > > > > > Is it possible to read the file in R using any tool? It is an image and I > > > am looking for the RGB of the file. > > > > > > Many thanks and best wishes, > > > Ranjan > > > > > > ______________________________________________ > > > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > > > https://stat.ethz.ch/mailman/listinfo/r-help > > > PLEASE do read the posting guide > > > https://www.R-project.org/posting-guide.html > > > and provide commented, minimal, self-contained, reproducible code. > > Hello, > > > > Maybe this [1] will help. It seems that that file is well known to have > > problems due to its large size but ImageMagick might be able to handle it. > > And there is a magick package on CRAN [2]. > > > > > > > > [1] https://github.com/ImageMagick/ImageMagick/issues/5509 > > [2] https://CRAN.R-project.org/package=magick > > > > Hope this helps, > > Rui, > > Thanks, but ImageMagick has a 65000 limit in each of the dimensions (I was > not aware about this earlier than today). This image in 69500 in the x extent. > > I don't know that R's magick can override the ImageMagick limitation. > > Best wishes, > Ranjan
I wanted to mention that after posting on the ImageMagick discussion board on github, I learnt that the restriction does not hold for converting to PNG (but for JPG) so I was able to convert it. However, I am not able to read the file into R (even with 0.5TB RAM) so I will unfortunately have to look at other options than R:-( I think I will write the code in C, but the PNG gives me a better start than I would have had with the original file (which I really do not know how to handle). Many thanks and best wishes, Ranjan ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide https://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
