compression

问题 I am currently trying to create a custom Deflate implementation in C#. I am currently trying to implement the "pattern search" part where I have (up to) 32k of data and am trying to search the longest possible pattern for my input. The RFC 1951 which defines Deflate says about that process: The compressor uses a chained hash table to find duplicated strings, using a hash function that operates on 3-byte sequences. At any given point during compression, let XYZ be the next 3 input bytes to be

问题 I am currently trying to create a custom Deflate implementation in C#. I am currently trying to implement the "pattern search" part where I have (up to) 32k of data and am trying to search the longest possible pattern for my input. The RFC 1951 which defines Deflate says about that process: The compressor uses a chained hash table to find duplicated strings, using a hash function that operates on 3-byte sequences. At any given point during compression, let XYZ be the next 3 input bytes to be

问题 I want to compress my HTTP request before sending it in java. how to do please ? I'm using JBoss4.2 as a Server 回答1: I guess you mean "response". See here on how to do it - you have to enable GZIP compression. 来源： https://stackoverflow.com/questions/3370335/compress-an-http-request-in-java

问题 I want to compress my HTTP request before sending it in java. how to do please ? I'm using JBoss4.2 as a Server 回答1: I guess you mean "response". See here on how to do it - you have to enable GZIP compression. 来源： https://stackoverflow.com/questions/3370335/compress-an-http-request-in-java

问题 I'm new to Apache NIFI and trying to build a flow as a POC. I need your guidance for the same. I have a compressed 'gz' file say 'sample.gz' containing a file say 'sample_file'. I need to decompress the sample.gz file and store 'sample_file' in a hdfs location. I'm using GetFile processor to get the sample.gz file, CompressContent processor in decompress mode to decompress the same file and PutHDFS processor to put the decompressed file in HDFS location. After running the flow, I can find

问题 Currently I am learning python and I'd like to get a little bit more into Data Compression. So I decided to try to code Run-Length Encoding(RLE). From what I've read it can be useful when you try to compress pictures. I would like to know what would be the easiest image-file-type for a beginner? How can I read out pixel RGB values or similar from a picture with python? 回答1: As for the second part of your question: I would highly recommend OpenCV. It is very power for image processing and

问题 I want to compress one text file using shutil.make_archive command. I am using the following command: shutil.make_archive('gzipped'+fname, 'gztar', os.path.join(os.getcwd(), fname)) OSError: [Errno 20] Not a directory: '/home/user/file.txt' I tried several variants but it keeps trying to compress the whole folders. How to do it correctly? 回答1: shutil can't create an archive from one file. You can use tarfile , instead: tar = tarfile.open(fname + ".tar.gz", 'w:qz') os.chdir('/home/user') tar

问题 I want to compress one text file using shutil.make_archive command. I am using the following command: shutil.make_archive('gzipped'+fname, 'gztar', os.path.join(os.getcwd(), fname)) OSError: [Errno 20] Not a directory: '/home/user/file.txt' I tried several variants but it keeps trying to compress the whole folders. How to do it correctly? 回答1: shutil can't create an archive from one file. You can use tarfile , instead: tar = tarfile.open(fname + ".tar.gz", 'w:qz') os.chdir('/home/user') tar

问题 Getting org.tukaani.xz.UnsupportedOptionsException: Uncompressed size is too big error while trying to decode LZMA compress xls file. Whereas non LZMA files getting unpack/decode without any issue. Both the cases same xls file being compressed. I am using Apache commons compress and org.tukaani.xz. sample code for reference package com.concept.utilities.zip; import java.io.File; import java.io.IOException; import java.io.InputStream; import org.apache.commons.compress.archivers.zip

问题 I have a binary file with contents created by zlib.compress on Python, is there an easy way to open and decompress it in Clojure? import zlib import json with open('data.json.zlib', 'wb') as f: f.write(zlib.compress(json.dumps(data).encode('utf-8'))) Basicallly it isn't a gzip file, it is just bytes representing deflated data. I could only find these references but not quite what I'm looking for (I think first two are most relevant): deflateclj_hatemogi_clojure/deflate.clj funcool/buddy-core