compression

问题 Simple machine learning question. Probably numerous ways to solve this: There is an infinite stream of 4 possible events: 'event_1', 'event_2', 'event_4', 'event_4' The events do not come in in completely random order. We will assume that there are some complex patterns to the order that most events come in, and the rest of the events are just random. We do not know the patterns ahead of time though. After each event is received, I want to predict what the next event will be based on the

问题 Trying to unzip a file on Win10 mobile (UWP) with the following code using (ZipArchive archive = new ZipArchive(stream, ZipArchiveMode.Read)) { ZipArchiveEntry entry = archive.Entries.First(); using (Stream reader = entry.Open()) { throws at entry.Open() the following error. "The underlying compression routine could not be loaded correctly." with the inner exception "Unable to load DLL 'clrcompression.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)"

问题 I have to write code in C to extract a password protected rar file in windows. I don't have any clue about how to do this. can anybody suggest me something or provide a sample piece of code? I will be very thankful. EDIT: This is the code I am using to open the rar file.In the system command ranjit is the password. It's giving the error undefined symbol_system in module+thefile name. Can anybody help me?? I am struggling on this since two days. EDIT: This code opens the archive but do not

问题 I am trying to develop a paint brush application thru processingjs. This API has function loadPixels() that will load the RGB values in to the array. Now i want to store the array in the server db. The problem is the size of the array, when i convert to a string the size is 5 MB. Is the best solution is to do compression at javascript level? How to do it? 回答1: See http://rosettacode.org/wiki/LZW_compression#JavaScript for an LZW compression example. It works best on longer strings with

问题 I am using this code: Inno Setup - How to add cancel button to decompressing page? (answer of Martin Prikryl) to decompress an arc file with Inno Setup. I want to have the possibility of decompress more than one arc file to install files from components selection (for example). But still show on overall progress bar for all extractions. whole Is this possible? 回答1: This is modification of my answer to Inno Setup - How to add cancel button to decompressing page? Prerequisities are the same,

问题 I publish Windows Forms application using ClickOnce. The installation is quite big considering the overall size of this app. It's something over 15 MB. If I compress locally built application it is squeezed to 2.5 MB. Can ClickOnce deployment be compressed somehow? If not, is anyone using IIS compression to speed up transfers? Would that help? 回答1: As far as I know, you can't really manually compress your assemblies. However, you absolutely can use IIS compression. From my testing with a

问题 When searching on how to inflate gzip compressed data on iOS, the following method appears in number of results: - (NSData *)gzipInflate { if ([self length] == 0) return self; unsigned full_length = [self length]; unsigned half_length = [self length] / 2; NSMutableData *decompressed = [NSMutableData dataWithLength: full_length + half_length]; BOOL done = NO; int status; z_stream strm; strm.next_in = (Bytef *)[self bytes]; strm.avail_in = [self length]; strm.total_out = 0; strm.zalloc = Z_NULL

问题 I'm building a index which is just several sets of ordered 32 bit integers stored continuously in a binary file. The problem is that this file grows pretty large. I've been thinking of adding some compressions scheme but that's a bit out of my expertise. So I'm wondering, what compression algorithm would work best in this case? Also, decompression has to be fast since this index will be used to make make look ups. 回答1: If you are storing integers which are close together (eg: 1, 3 ,4, 5, 9,

问题 I'am creating a video from an array of images. The purpose of my work is to create a .mov video with no compression. I have see in developer library that it exist a key "AVVideoCompressionPropertiesKey" but I don't know how to specify no compression with this key. Could you help me please? Here is my sample code : NSDictionary *videoCleanApertureSettings = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithInt:320], AVVideoCleanApertureWidthKey, [NSNumber numberWithInt:480],

问题 My company uses a legacy file format for Electromiography data, which is no longer in production. However, there is some interest in maintaining retro-compatibility, so I am studying the possibility to write a reader for that file format. By analyzing a very convoluted former source code written in Delphi, the file reader/writer uses ZLIB, and inside a HexEditor it looks like there is a file header in binary ASCII (with fields like "Player", "Analyzer" readily readable), followed by a