compression

i've wrote an an application in Java for compressing & decompressing the String using Deflaor and Inflator. but when i run the below code i'm getting the following exception. can anyone please tell me some solutions for this Deflated String:x��Q�n�0��@>"C��E����3�,[ d����9��P������x�O�����hcy��L �Ct��{~m�I:�$�%\HD+�I� �NwG Exception in thread "main" java.util.zip.DataFormatException: incorrect header check at java.util.zip.Inflater.inflateBytes(Native Method) at java.util.zip.Inflater.inflate(Inflater.java:223) at java.util.zip.Inflater.inflate(Inflater.java:240) at sample_ftp.Sample_ftp.main

I am trying to use a zlib_decompressor to decompress data through an istreambuf_iterator . I couldn't find an in built way to use an input iterator as input to a stream (please point out a way if one exists already) so I wrote this source: template <class cha_type, class iterator_type> class IteratorSource { public: typedef cha_type char_type; typedef boost::iostreams::source_tag category; iterator_type& i; iterator_type eof; IteratorSource(iterator_type& it, iterator_type end) : i(it), eof(end) { } std::streamsize read(char* s, std::streamsize n) { for(int j = 0; j < n; j++) { if(i == eof) {

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center . Closed 7 years ago . This is sort of an architectural/conceptual question regarding how a system (specifically a web browser) handles compressed images. We're dealing with an "image gallery" web app at work that has eleven 1920x1080 images on a page that you can swipe through on an iPad. We're finding it to be extremely slow and I'm

I'm playing with Jetty GzipHandler and it seems to work rather strangely: It only compresses already compressed files. My whole setup is GzipHandler gzipHandler = new GzipHandler(); gzipHandler.setHandler(myHandler); server.setHandler(gzipHandler); The browser (Chromium) always sends a header containing Accept-Encoding:gzip,deflate,sdch so according to the documentation GZIP Handler This handler will gzip the content of a response if: The filter is mapped to a matching path The response status code is >=200 and <300 The content length is unknown or more than the minGzipSize initParameter or

Does anyone know of a Java implementation of the PPMD compression algorithm? I have not been able to find a Java implementation, but there is a C# implementation at http://users.senet.com.au/~mjbone/Compression.html that is about 4k lines of code. I'm not going to ask if anyone feels like porting it to Java... I was using for the same implementation, and couldn't find any. But I found that 7zip gives the source code of their ppmd implementation just in C++, not in java (at least, until now). I used system call's to 7zip do compress the data I need, using the command-line version of 7zip.

This is a question about TIFF and compression. I have hundreds of LZW compressed tiff images. I wonder, is it possible to convert those to CCITT T.6? Is there some API? Please help. Bobrovsky LZW compression can be used to compress almost any image. CCITT T.6 can compress only bilevel (black and white) images. If your images are bilevel ones and they are compressed with LZW compression then you can recompress them using tiffcp utility (comes with LibTiff.Net library, free, source code available). If your images are full-color ones then you will have to convert them to bilevel first. One of my

I used many existing codes and I tried to zip the folder in many ways but still I am having problem with time and folder size (still approx same size). this code is from the source of the library and still not giving the wanted result static void Main(string[] args) { //copyDirectory(@"C:\x", @"D:\1"); ZipOutputStream zip = new ZipOutputStream(File.Create(@"d:\2.zip")); zip.SetLevel(9); string folder = @"D:\music"; ZipFolder(folder, folder, zip); zip.Finish(); zip.Close(); } public static void ZipFolder(string RootFolder, string CurrentFolder, ZipOutputStream zStream) { string[] SubFolders =