compression

Arduino: Lightweight Compression Algorithm to store data in EEPROM

I want to store a shitload of data onto my Arduino whith ATmega168/328 Controller, but unfortunately there's only 256KB / 512KB of EEPROM storage. My idea is to make use of an compression algorithm to strip down the size. But well, my knowledge on compression algorithms is quite low and my search for ready-to-use libraries failed. So,...

Odd Error in SharpZipLib -- Size was x, but I expected y

I'm getting an error when I use the SharpZipLib. I have code that looks like FastZip compressor = new FastZip(); compressor.CreateZip(outputFileName, currentWorkingDirectory, true, ""); Which seems to be correct. However, I get a ZipException claiming that size was 0, but I expected 54 I have no idea what that means. Anyone have...

Error Deflate And Inflate With zLib

Hello, I'm trying to compile the zpipe.c example in my Linux(Ubuntu 8.04) with gcc, but I'm getting some errors, take a look: [ubuntu@eeepc:~/Desktop] gcc zpipe.c /tmp/ccczEQxz.o: In function `def': zpipe.c:(.text+0x65): undefined reference to `deflateInit_' zpipe.c:(.text+0xd3): undefined reference to `deflateEnd' zpipe.c:(.text+0x150...

CSS Minimizer ?

Do you know of an online CSS compressor that helps remove redudant/ineffecient CSS declarations and replaces it with more optimized CSS? Meaning, I know that a lot of "compressors" exist that simply remove tabs, remove comments, etc. But what I'm looking for is something smart enough to know that: border-top: 1px solid red; border-bo...

any functions to create zip file of directory/file on vista with delphi 2009

I am looking for a simple method of zipping and compressing with delphi. I have already looked at the components at torry delphi:http://www.torry.net/pages.php?s=99. They all seem as though they would accomplish what I want however a few disadvantages to using them is that none of them run in delphi 2009 and are very complex which makes ...

Blackberry - Programmatically extract/open zip file

I have looked online with mixed results, but is there a way to programmatically extract a zip file on the BB? Very basic my app will display different encrypted file types, and those files are delivered in a zip file. My idea was to have the user browse to the file on their SDCard, select it, and I extract what i need as a stream from th...

How to validate that a file is a password protected ZIP file, using C#

Given a path to a file, how can I validate that the file is a password-protected zip file? i.e., how would I implement this function? bool IsPasswordProtectedZipFile(string pathToFile) I don't need to unzip the file -- I just need to verify that it's a ZIP and has been protected with some password. Thanks ...

SQL 2008 Dictionary Data Compression - is this only for WHOLE column matches?

For simplicity suppose I have one varchar(50) per row and these are my rows: 1) The quick brown fox jumps over the lazy dog 2) I like brown foxes 3) fox 4) fox So the page compression would find the word fox for instance and put it in the dictionary. Would only rows 3 and 4 benefit and rows 1 and 2 would not because they contain other...

HTML online minimizer/compressor?

Does anyone know of a good online generator to take the source code of an HTML page and compress/minimize the entire page. Meaning, compress/minimize all embedded CSS, JavScript and obviously the HTML of that web page while also removing unneeded HTML/CSS/JavaScript comments, spaces, tabs, etc? ...

Any experience combining JS / CSS in MVC?

I'm planning to implement a solution for combining multiple js/css files into single files in my MVC project, but currently I doubt between the following two possibilities: Telerik Extensions for ASP.NET MVC (www.telerik.com/products/aspnet-mvc.aspx) Supports combining multiple files into one request Supports groups of web assets Sup...

Compressing xls content with apache deflate module

I am trying to compress an excel spreadsheet being sent from my application using apache deflate module. I have added the following line to the my sites-enabled file: AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css text/javascript application/excel But is seems to make the response data bigger??? Using firebug, w...

With Compression ActionFilter, Server error messages clears content-encoding header and renders as gibberish

When I'm using a compression filter and get an error, the error page is just gibberish characters. The problem seems to be that when IIS transfers to the error page the compression filter is still in effect, but the headers are cleared. Without the "Content-encoding: gzip" header the browser just displays the raw gzipped binary data. I'...

Jpeg compression with high quality in c#

I want to save images with c# but while using .net jpeg format it reduces quality and compression is not enough. It must save the file like its orjinal quality and size. I am using this code but It has not enough quality and compression. I am archiving studio photos and quality and compression is very important. Thanks. Bitmap bm = (Bit...

How to minify jquery files?

Hi I am using jquery and I got a couple plugins that don't offer a minified version. So I want to take the full version and minfiy it but all the sites I have found that you input your javascript and it minifies it breaks the plugin. Like it must strip something out because I get a syntax error. So anyone got a good one that I can u...

PVRTC compression increasing the file sizes of PNG

For iPhone game development, I switched from PNG format to PVRTC format for the sake of performance. But PVRTC compression is creating files that are much bigger than the PNG files.. So a PNG of 140 KB (1024x1024) gets bloated to 512 KB or more in the PVRTC format.. I read somewhere that a PNG file of 50KB got compressed to some 10KB and...

lightweight RESTful PHP server

I want to write an extremely lightweight PHP server which handles data requests from remote clients. The data returned is tabular (like that of data read from a CSV file or a database table). The "problem" is that I could be returning potentially several hundred thousand rows of data - with a column width of between 10 - 15 (depending on...

how to send zipped (ASCII) data in an HTTP response from PHP

I am writing a service that sends data as a response, to a client. I am sending text (PLAIN ASCII) data, but I want to compress the data first (uzing any of the standard compression routines), and then send the compressed data back to the server, using the header() function etc. I am relatively new to PHP so having gathered the data, I...

PVRTC format compromises image quality

Hi, For iPhone game development, I switched from PNG format to PVRTC format for the sake of performance. But PVRTC compression is ruining the quality of the images.. I am using spritesheets with transparencies for the character animations.. and the pvrtc makes the edges look muddy around the character near the transparencies. I read th...

Zip File with PPMD Compression, Programmatically Unzip

I have a Linux Python script that needs to unzip some zip files. I was using the zipfile module. On a few of these files I'm getting: BadZipfile: Unsupported compression method 98 for file Searching around it seems these files are using Method 98 PPMD compression. I figured if python couldn't do it, I'd make a hack system call to u...

CONTEST: optimize size of grayscale scanned documents!

I put this as a contest, but it's still a question! Here's the original image: http://dl.dropbox.com/u/1663633/original_scan.jpg Original size is about 1 megabyte. How would you reduce the size so that the final print on a A4 paper (about letter size I think..) still looks good? Rules: The process MUST be automatic (to be applied to...