java - Convert RGB PNG to CMYK JPEG (using ICC Color Profiles) -


i need convert png-file cmyk jpeg.

during research i've found multiple articles on decribing problem. i've copied this answer using bufferedimage , colorconvertop.

i came little example:

public static void main(final string[] args) throws ioexception {     final string imagefile = "/tmp/page0.png";      final bufferedimage pngimage = imageio.read(new file(imagefile));      // convert png jpeg     // http://www.mkyong.com/java/convert-png-to-jpeg-image-file-in-java/     final bufferedimage rgbimage = new bufferedimage(pngimage.getwidth(), pngimage.getheight(), bufferedimage.type_int_rgb);     rgbimage.creategraphics().drawimage(pngimage, 0, 0, color.white, null);      // rgb cmyk using colorconvertop     // https://stackoverflow.com/questions/380678/how-to-set-icc-color-profile-in-java-and-change-colorspace/2804370#2804370     final icc_profile ip = icc_profile.getinstance("icc/isocoated_v2_300_eci.icc");     // final icc_profile ip = icc_profile.getinstance("icc/coatedfogra27.icc");     // final icc_profile ip = icc_profile.getinstance("icc/uswebuncoated.icc");      final colorconvertop cco = new colorconvertop(new icc_colorspace(ip), null);     final bufferedimage cmykimage = cco.filter(rgbimage, null);      // write result bytearray     final bytearrayoutputstream baos = new bytearrayoutputstream();     imageio.write(cmykimage, "jpg", baos);     baos.flush();      final byte[] imageinbyte = baos.tobytearray(); }

the problem is, leads me exception:

exception in thread "main" javax.imageio.iioexception: invalid argument native writeimage     @ com.sun.imageio.plugins.jpeg.jpegimagewriter.writeimage(native method)     @ com.sun.imageio.plugins.jpeg.jpegimagewriter.writeonthread(jpegimagewriter.java:1058)     @ com.sun.imageio.plugins.jpeg.jpegimagewriter.write(jpegimagewriter.java:360)     @ javax.imageio.imagewriter.write(imagewriter.java:615)     @ javax.imageio.imageio.dowrite(imageio.java:1612)     @ javax.imageio.imageio.write(imageio.java:1578)     @ ... .pdf.reportgeneratorpubliccontenttest.main(reportgeneratorpubliccontenttest.java:69)

the message of exception doesn't me. on this thread sun jdk or jai fix problem.

i tried apt-get install libjai-core-java , oracle jdk jdk1.7.0_51. error still persists.

@christian schneider : after download image file link of cmyk jpeg, open file's property. see color space of image still rgb. picture isn't converted cmyk color. please see below link :

how can convert rgb image cmyk , vice versa in java?

lovelywib 's answer solved this.


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