jpeg2000

问题 I'm using HTML5 technology with the FileApi. My problem is very simple, but i'm searching since 2 days ago and I have not find anything on the web I have a DicomFile. I use the FileApi from HTML5 to break it down, and get all the information. Finally I get the image data in a byte array. The problem is that I can not decode a JPEG2000 Image and show it in the browser (Chrome, FireFox, any). For example, if the image data is coded in JPEG format, I have no problem at all to show the image in

问题 I have a byte[] that I want to convert to an Image and display the image in a label. The byte[] is of a jpeg 2000 format. I have tried the code below but it returns null: InputStream in = new ByteArrayInputStream(bytearray); BufferedImage image = ImageIO.read(in); The image value comes back as null . I want to be able to display the image in a label like below: jLabel.setIcon(new ImageIcon(image)); Thanks 回答1: To convert an array of bytes, i.e. byte[] into an Image , use getImage() . Probably

问题 I have a byte[] that I want to convert to an Image and display the image in a label. The byte[] is of a jpeg 2000 format. I have tried the code below but it returns null: InputStream in = new ByteArrayInputStream(bytearray); BufferedImage image = ImageIO.read(in); The image value comes back as null . I want to be able to display the image in a label like below: jLabel.setIcon(new ImageIcon(image)); Thanks 回答1: To convert an array of bytes, i.e. byte[] into an Image , use getImage() . Probably

问题 I have a code using a byte[] that contains a image jpeg2000 bytes. I want show this in jLabel component howto do this? Anyone have idea or code to do? 回答1: You would do it in this way Image img = ImageIO.read(new ByteArrayInputStream(imageBytes)); ImageIcon imgIcon = new ImageIcon(img); JLabel label = new JLabel(imgIcon); but the JPG2000 decoder isn't supplied with standard SDK, you should head here (Java Advanced Imaging) and use the right decoder for that format.. 回答2: Apparently the

问题 I'm trying to convert a JPEG2000 (.jp2) image to other formats (JPEG or PNG), so I try to use write method of javax.imageio package. This works fine for other formats (eg. JPEG to PNG), but when it comes to JPEG2000 (or TIFF) it throws an exception. Could anyone tell me what are the possible formats of the input image? Exception in thread "main" java.lang.IllegalArgumentException: im == null! at javax.imageio.ImageIO.write(ImageIO.java:1457) at javax.imageio.ImageIO.write(ImageIO.java:1565)

问题 I have a jpeg2000 image, img.jp2 on a file, and on a DataInputStream object imgobj in my project, and want to show that image on a JFrame. The old version jai_imageio-1.1.jar recommended here and the jj2000 library are both included. I have tried: j2kImageReader.setInput(new FileImageInputStream(new File(fileName))); ImageReadParam imageReadParam = j2kImageReader.getDefaultReadParam(); imageReadParam.setSourceRegion(new Rectangle(0, 0, 300, 300)); IIOImage image = j2kImageReader.readAll(0,

问题 I would like to use the Python Pillow library to save 16 bit gray scale arrays in the jp2 ("JPEG 2000") format. I have hit a brick wall in trying to install the required library OpenJPEG on my Windows machine. The documentation is not very clear... but I assumed that I needed to download the Win64 binaries and simply put them on my path ( which I did). That done, I am still getting the following error when using Pillow 4.0.0 in Anaconda 4.3.0 on Windows. IOError: encoder jpeg2k not available

问题 I wonder: What is the intented way to read jp2 tile by tile, and to store data in buffer objects? Right now i do something like that. /* note I already created stream and configured decoder and resolution factor is set to 0 */ opj_codestream_index_t *pJP2CodeStreamIndex = opj_get_cstr_index(pJP2Codec); opj_codestream_info_v2_t *pJP2CodeStreamInfo = opj_get_cstr_info(pJP2Codec); CDrawRect myRect GetDrawRect(&myRect); int start_x = myRect.left; int start_y = myRect.top; int end_x = myRect.right

问题 I'm trying to render a pdf (with pdf-renderer or jpedal), and it can't handle an image encoded using JPX. Is there any open-source java library that can decode JPX? 回答1: JPX needs JPEG2000 which needs the JAI and imageIO libraries. JPedal has support for JPX - you just need to enable it which explained on the support section. There is a patched version of the imageio to fix the memory bug on our site at http://www.jpedal.org/PDFblog/2011/03/java-jai-image-io-jpeg2000-memory-leak-fix/ 来源：

问题 I want to find an open source library with BSD/MIT (or equivalent) licence that is able to read XML (or any) metadata from .jp2 files. Research so far: OpenJpeg doesn't reading metadata EasyExif doesn't support the jpeg2000 format Grok is using the AGPL licence which I can't use. Kakadu is commercial Any ideas? 来源： https://stackoverflow.com/questions/44220571/read-jpeg2000-metadata