Read/open image from resource inside a JAR file?
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Read/open image from resource inside a JAR file?
 
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Hello group,
does anyone know of a straightforward way to read/open an image that is contained as a resource inside a JAR file? That is, without perhaps copying an java.io.InputStream to a temporary file etc. ... Any hints highly appreciated -- Wilhelm -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html |
Re: Read/open image from resource inside a JAR file?
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Hi Wilhelm,
a rough guess, stealing code from here and there... If you have a plugin named MyPlugin, and a directory 'images' in its .jar file, you can use URL imageURL = MyPlugin.class.getResource("images/myImage.png"); Then use the ImageJ URLOpener class or get a BufferedImage with javax.imageio.ImageIO: BufferedImage bi = ImageIO.read(url); Michael ________________________________________________________________ On 2016-05-31 16:22, Burger Wilhelm wrote: > Hello group, > > does anyone know of a straightforward way to read/open an image that is contained as a resource inside a JAR file? That is, without perhaps copying an java.io.InputStream to a temporary file etc. ... > > Any hints highly appreciated > -- Wilhelm > > > > -- > ImageJ mailing list: http://imagej.nih.gov/ij/list.html > -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html |
Re: Read/open image from resource inside a JAR file?
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In reply to this post by Burger Wilhelm
Hi Wilhelm,
I believe the ij.io.Opener class has an "openTiff(java.io.InputStream in, java.lang.String name)" function that returns an ImagePlus object (if that's the type of images in your .jar file). You should be able to pass a JarInputStream to it to retrieve your images. HTH, John Le 31 mai 2016 à 10:22, Burger Wilhelm a écrit : > Hello group, > > does anyone know of a straightforward way to read/open an image that is contained as a resource inside a JAR file? That is, without perhaps copying an java.io.InputStream to a temporary file etc. ... > > Any hints highly appreciated > -- Wilhelm > > > > -- > ImageJ mailing list: http://imagej.nih.gov/ij/list.html -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html |
Re: Read/open image from resource inside a JAR file?
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In reply to this post by Burger Wilhelm
> On May 31, 2016, at 10:22 AM, Burger Wilhelm <[hidden email]> wrote:
> > Hello group, > > does anyone know of a straightforward way to read/open an image that is contained as a resource inside a JAR file? That is, without perhaps copying an java.io.InputStream to a temporary file etc. … The JAR Resources Demo plugin at https://imagej.nih.gov/ij/plugins/pcl-demo.html opens a JPEG image, a TIFF image and a text file contained in a JAR file. It opens the JPEG using a URL and the TIFF using an InputStream. -wayne -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html |
Re: Read/open image from resource inside a JAR file?
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In reply to this post by John Hayes
Hi John,
excellent hint! -- works well, but unfortunately my images are not necessarily in TIF format. Thanks much, Wilhelm -----Original Message----- From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of John Hayes Sent: Dienstag, 31. Mai 2016 18:19 To: [hidden email] Subject: Re: Read/open image from resource inside a JAR file? Hi Wilhelm, I believe the ij.io.Opener class has an "openTiff(java.io.InputStream in, java.lang.String name)" function that returns an ImagePlus object (if that's the type of images in your .jar file). You should be able to pass a JarInputStream to it to retrieve your images. HTH, John Le 31 mai 2016 à 10:22, Burger Wilhelm a écrit : > Hello group, > > does anyone know of a straightforward way to read/open an image that is contained as a resource inside a JAR file? That is, without perhaps copying an java.io.InputStream to a temporary file etc. ... > > Any hints highly appreciated > -- Wilhelm > > > > -- > ImageJ mailing list: http://imagej.nih.gov/ij/list.html -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html |
Re: Read/open image from resource inside a JAR file?
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In reply to this post by Rasband, Wayne (NIH/NIMH) [E]
Thanks Wayne for this hint, I must have overlooked that plugin when I searched for it.
I am not completely happy with this solution though, since every file/image type is handled individually. Against my initial intentions (and lacking a better idea), I now consider extracting arbitrary resources to temporary files and subsequently load/process them. --Wilhelm -----Original Message----- From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of Rasband, Wayne (NIH/NIMH) [E] Sent: Mittwoch, 01. Juni 2016 02:19 To: [hidden email] Subject: Re: Read/open image from resource inside a JAR file? > On May 31, 2016, at 10:22 AM, Burger Wilhelm <[hidden email]> wrote: > > Hello group, > > does anyone know of a straightforward way to read/open an image that is contained as a resource inside a JAR file? That is, without perhaps copying an java.io.InputStream to a temporary file etc. … The JAR Resources Demo plugin at https://imagej.nih.gov/ij/plugins/pcl-demo.html opens a JPEG image, a TIFF image and a text file contained in a JAR file. It opens the JPEG using a URL and the TIFF using an InputStream. -wayne -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html |
Re: Read/open image from resource inside a JAR file?
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In reply to this post by Burger Wilhelm
Hi Wilhelm,
Do you know what file formats you need support for? Anyway, it's a bit more complicated, and I don't know what file formats it supports (looks like at least PNG), but you might can try the following (slightly modified from code in Opener::openPngUsingURL): > Image img = null; > try { > img = ImageIO.read(jarInputStream); > } catch (IOException e) { > IJ.log(""+e); > } > if (img!=null) { > ImagePlus imp = new ImagePlus(title, img); > return imp; > } else > return null; ImageIO is in the javax.imagio package. If the file format you are interested is not supported by ImageIO by default, you might be able to add support for additional formats as highlighted in this thread: http://stackoverflow.com/questions/17021391/how-to-make-imageio-support-more-formats HTH, John Le 1 juin 2016 à 10:57, Burger Wilhelm a écrit : > Hi John, > > excellent hint! -- works well, but unfortunately my images are not necessarily in TIF format. > > Thanks much, > Wilhelm > > > -----Original Message----- > From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of John Hayes > Sent: Dienstag, 31. Mai 2016 18:19 > To: [hidden email] > Subject: Re: Read/open image from resource inside a JAR file? > > Hi Wilhelm, > > I believe the ij.io.Opener class has an "openTiff(java.io.InputStream in, java.lang.String name)" function that returns an ImagePlus object (if that's the type of images in your .jar file). You should be able to pass a JarInputStream to it to retrieve your images. > > HTH, > > John > > Le 31 mai 2016 à 10:22, Burger Wilhelm a écrit : > >> Hello group, >> >> does anyone know of a straightforward way to read/open an image that is contained as a resource inside a JAR file? That is, without perhaps copying an java.io.InputStream to a temporary file etc. ... >> >> Any hints highly appreciated >> -- Wilhelm >> >> >> >> -- >> ImageJ mailing list: http://imagej.nih.gov/ij/list.html > > -- > ImageJ mailing list: http://imagej.nih.gov/ij/list.html -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html |
Re: Read/open image from resource inside a JAR file?
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Another interesting idea! Will look into this ...
Thanks much, Wilhelm -----Original Message----- From: John Hayes [mailto:[hidden email]] Sent: Mittwoch, 01. Juni 2016 17:36 To: Burger Wilhelm <[hidden email]> Cc: John Hayes <[hidden email]>; [hidden email] Subject: Re: Read/open image from resource inside a JAR file? Hi Wilhelm, Do you know what file formats you need support for? Anyway, it's a bit more complicated, and I don't know what file formats it supports (looks like at least PNG), but you might can try the following (slightly modified from code in Opener::openPngUsingURL): > Image img = null; > try { > img = ImageIO.read(jarInputStream); > } catch (IOException e) { > IJ.log(""+e); > } > if (img!=null) { > ImagePlus imp = new ImagePlus(title, img); > return imp; > } else > return null; ImageIO is in the javax.imagio package. If the file format you are interested is not supported by ImageIO by default, you might be able to add support for additional formats as highlighted in this thread: http://stackoverflow.com/questions/17021391/how-to-make-imageio-support-more-formats HTH, John Le 1 juin 2016 à 10:57, Burger Wilhelm a écrit : > Hi John, > > excellent hint! -- works well, but unfortunately my images are not necessarily in TIF format. > > Thanks much, > Wilhelm > > > -----Original Message----- > From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of John Hayes > Sent: Dienstag, 31. Mai 2016 18:19 > To: [hidden email] > Subject: Re: Read/open image from resource inside a JAR file? > > Hi Wilhelm, > > I believe the ij.io.Opener class has an "openTiff(java.io.InputStream in, java.lang.String name)" function that returns an ImagePlus object (if that's the type of images in your .jar file). You should be able to pass a JarInputStream to it to retrieve your images. > > HTH, > > John > > Le 31 mai 2016 à 10:22, Burger Wilhelm a écrit : > >> Hello group, >> >> does anyone know of a straightforward way to read/open an image that is contained as a resource inside a JAR file? That is, without perhaps copying an java.io.InputStream to a temporary file etc. ... >> >> Any hints highly appreciated >> -- Wilhelm >> >> >> >> -- >> ImageJ mailing list: http://imagej.nih.gov/ij/list.html > > -- > ImageJ mailing list: http://imagej.nih.gov/ij/list.html -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html |
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Hi Wilhelm,
> does anyone know of a straightforward way to read/open an image that > is contained as a resource inside a JAR file? That is, without perhaps > copying an java.io.InputStream to a temporary file etc. ... For performance, you should probably copy the InputStream to a temporary file. Some formats including TIFF may require lots of random access seeks to read the data, so limiting yourself to a stream makes life difficult. That said, SCIFIO intends to support reading image data from streams (using mark/reset internally). But depending on the size and structure of your image file, you may not be happy with the performance. Here is an example Groovy script: --snip-- // @DatasetIOService io // @UIService ui // @OUTPUT Dataset image imagePath = "about.jpg" // to search only the JAR containing the current class //url = getClass().getResource(imagePath) // to search all available JARs resources = Thread.currentThread().getContextClassLoader().getResources(imagePath) url = resources.hasMoreElements() ? resources.nextElement() : null if (url == null) { ui.showDialog("No such image found: " + imagePath) return } // open the URL using SCIFIO image = io.open(url.toString()) --snap-- Unfortunately, it seems there is a bug right now. I filed an issue for it: https://github.com/scifio/scifio/issues/304 I know this doesn't help you in the moment, but just wanted to mention that this will become easier in the future. Regards, Curtis -- Curtis Rueden LOCI software architect - http://loci.wisc.edu/software ImageJ2 lead, Fiji maintainer - http://imagej.net/User:Rueden Did you know ImageJ has a forum? http://forum.imagej.net/ On Wed, Jun 1, 2016 at 10:43 AM, Burger Wilhelm < [hidden email]> wrote: > Another interesting idea! Will look into this ... > > Thanks much, > Wilhelm > > -----Original Message----- > From: John Hayes [mailto:[hidden email]] > Sent: Mittwoch, 01. Juni 2016 17:36 > To: Burger Wilhelm <[hidden email]> > Cc: John Hayes <[hidden email]>; [hidden email] > Subject: Re: Read/open image from resource inside a JAR file? > > Hi Wilhelm, > > Do you know what file formats you need support for? > > Anyway, it's a bit more complicated, and I don't know what file formats it > supports (looks like at least PNG), but you might can try the following > (slightly modified from code in Opener::openPngUsingURL): > > > Image img = null; > > try { > > img = ImageIO.read(jarInputStream); > > } catch (IOException e) { > > IJ.log(""+e); > > } > > if (img!=null) { > > ImagePlus imp = new ImagePlus(title, img); > > return imp; > > } else > > return null; > > ImageIO is in the javax.imagio package. If the file format you are > interested is not supported by ImageIO by default, you might be able to add > support for additional formats as highlighted in this thread: > > http://stackoverflow.com/questions/17021391/how-to-make-imageio-support-more-formats > > HTH, > > John > > Le 1 juin 2016 à 10:57, Burger Wilhelm a écrit : > > > Hi John, > > > > excellent hint! -- works well, but unfortunately my images are not > necessarily in TIF format. > > > > Thanks much, > > Wilhelm > > > > > > -----Original Message----- > > From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of > John Hayes > > Sent: Dienstag, 31. Mai 2016 18:19 > > To: [hidden email] > > Subject: Re: Read/open image from resource inside a JAR file? > > > > Hi Wilhelm, > > > > I believe the ij.io.Opener class has an "openTiff(java.io.InputStream > in, java.lang.String name)" function that returns an ImagePlus object (if > that's the type of images in your .jar file). You should be able to pass a > JarInputStream to it to retrieve your images. > > > > HTH, > > > > John > > > > Le 31 mai 2016 à 10:22, Burger Wilhelm a écrit : > > > >> Hello group, > >> > >> does anyone know of a straightforward way to read/open an image that is > contained as a resource inside a JAR file? That is, without perhaps copying > an java.io.InputStream to a temporary file etc. ... > >> > >> Any hints highly appreciated > >> -- Wilhelm > >> > >> > >> > >> -- > >> ImageJ mailing list: http://imagej.nih.gov/ij/list.html > > > > -- > > ImageJ mailing list: http://imagej.nih.gov/ij/list.html > > -- > ImageJ mailing list: http://imagej.nih.gov/ij/list.html > -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html |
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