HP users which still have some use for compression software may be
interested in the recent release of the first beta of BZ2.
BZ2 is a compression engine completely compatible with the original BZ
from Mika Heiskannen and its evolution BZ49.
BZ2 objectives are to compress & decode faster than BZ, while
achieving at the same time higher compression ratio. Thanks to full
compatibility, BZ2 can decode BZ-compressed objects, and its output
can also be decoded by older BZ, including HP4...Buy Trend Micro Internet Security Pro Receive H&R Block TaxCut Premium Free!!
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My question is, can a compressed file be further compressed by
the same compression algorithm or other compresssion
algorithm? Why or Why not?
My experimental result is. Yes, it can be further compressed by a
considerably amount. (sometimes 50%)
Is that theoratically possible? This is against the impression I used
to have. Can some one kindly answer my question or give me some
- detailed description -------------------------------------
compression library : LZO
my data set : binary data.
I have a program that uses lzo library to com...Compression question #2
I'm using PSP Photo X2.
I'm uploading some pics to a photo-sharing site (SmugMug). The
uploading has been taking a long time so I decided to use Export/JPG
Optimiser first in order to reduce the size of the files. I've been
using it for years for that purpose, when making pictures for my
webpage, but now I'm wondering whether I've somehow misunderstood.
I've opened a file. When I look at it in Windows Explorer, or look at
the Image Info in PSP, I'm told that the size of the file is 4,472KB.
However, when I then go to Export/JPG Optimiser it tells me that the
...Compress an already compressed Jpeg
We are trialing some software that very basically allows your average Joe
with the correct client software installed send an image file via the
internet to a server running the server side of this software. While this is
already very easy to do with a bit of HTML code and asp/php e.t.c to receive
and manipulate the file. This software claims to compress the image before
it is sent and then decompress the server end with no loss using file
compression rather than further image compression. What's more it claims it
compresses them up to 80% compression before transfer!
While I can believe t...Compressing DVD files
I have Mac The Ripper v3.x and I have ripped a DVD. I now have a
folder (TS folder) full of files.
Forgive me, as I do not know anything about ripping DVDs.
I have a few questions. If you have any time and are willing to help,
I would be grateful.
1) Once MTR does its job, how do I use the folder of files to burn to a
2) What if this folder is too large for a single DVD? I have
downloaded and used Divx and Xvid files in the past and they are
fanstastic quality. How would I go about compressing the video?
Any advice on doing this process anywhere from A to Z wou...Creating compressed archive > 2 GB under OSS
Has anybody been able to create an archive > 2 GB with OSS? I tried
the several utilities like gzip, but when the archive reaches 2 GB,
the operation ends with an error. I want to compress a rather large
directory (32GB) into one archive. Of course splitting the archive
into several smaller files, like PAK does, would help. Preferably I
would like to produce the archive in the Guardian filespace. I need
this archive for backup reasons.
Thanks in advance
On Dec 14, 10:09 am, wbreidbach <wolfgang.breidb...@bv-
> Has anybody been able to create an ...How to quickly crop images to 3:2 aspect ratio?
I have a hundred or so 1600x1200 images that I want to crop to a 3:2
aspect ratio for making 4x6 prints. I used to use a Windows application
(MGI Photosuite) that had the ability to crop to an aspect ratio and was
quick in that you couldn't screw up.
I realize Gimp allow selection aspect ratios, but the selection
rectangle is a free-for-all in that I cannot quickly determine if the
upper left corner is at 0,0. It still requires some precision mouse
How can I quickly do this? I want to be able to move the selection
up/down and then crop.
I got this 'wack' concept while I'm working
Sinx [0,1] in Q-I
so as Cosx [0,1] in Q-I
but Tan has [0, infinity]
If I change binary data like this
I can found out angle in Rads
so we can get better compression ratios
This time where I did my mistake.
On Nov 14, 9:38=A0am, Nimo <azeez...@gmail.com> wrote:
> I got this 'wack' concept while I'm working
> with Trigonometry
> see this
> Sinx [0,1] in Q-I
> so a...file compression
I'd like to use python for file compression/decompression. I see from the
manuals that there's a number of ways to do that, so I was hoping somebody could
point me toward the lightest-weight solution. The files I'm working with are
python modules and LaTeX source files, and I need to make them into archives so
I can store them in my website. Any help will be much appreciated. Thank you.
Elaine> The files I'm working with are python modules and LaTeX source
Elaine> files, and I need to make them into archives so I can store them
Elaine> in my webs...TIP #234: Add Support For Zlib Compression
TIP #234: ADD SUPPORT FOR ZLIB COMPRESSION
Version: $Revision: 1.1 $
Author: Pascal Scheffers <pascal_at_scheffers.net>
Created: Wednesday, 08 December 2004
This TIP proposes a new core package with commands to handle
compressi...efficient compression tools
I am facing the following problem (on a mainframe platform). After a
few somewhat crude attempts on my own, I thought I would seek guidance
from any experts out there...
I have a log file with the following fixed format (it is infact an MVS
PDSE but that shouldn't matter).
15-char data set name (padded right with spaces)
8-char timestamp mmddyyyy
6-char file size (i.e. can be at most 999999, padded left with spaces)
My system produces about 20 such logfiles a day, each about 10MB. I
want to compress these files as much as possible manner using standard
UNIX too...Java text compression
What's the fastest way to compress/decompress text?We're doing that over really large datasets in our app. We're currently converting char arrays to byte arrays using our own UTF-8 conversion code, and then compressing the bytes using java.util.zip. The code is pretty old.I don't like this two-step process, and the profiler shows that this is a bottleneck in our app.Is anyone aware of any code that compresses chars directly? Perhaps a third-party library that does it faster?In our particular situation, decompression speed is a lot more important than compression speed. Chris wr...ACE not really portable if you need to copy config.h
IMHO, ACE is not really portable if you have to copy the config.h file
from the source config-$OS$.h
I wasted time trying to build ACE, because I wasn't aware that this
file had to be copied.
I'm sure this happens to a lot of first time users.
IMHO, it would be far better if there was one config.h file that used
#ifdef to point to the desired OS config.h file.
#i...BWT code for image compression.
I'm looking for BWT(binary wavelet transform) code for image
I'd like to compress a JPEG file using BWT
i want any technique to compress jpeg image.
"Amit" <email@example.com> wrote in message
> hi ,
> i want any technique to compress jpeg image.
> please help.
function y = compressimage(imagename)
y = ;
There you go, perfect compression. Oh, you wanted a _specific_ type of
image compression? You want to be able to reverse the compression? That's
a bit trickie...To Compress or Not To Compress -- That is the Question !
I'm running a website (I have three sites on my older Dell -- Pentium 4
with 2GB of Memory and a 350Gig Harddrive) with an xHarbour .exe as the CGI
If I have many simultaneous clients, is there a significant benefit or
penalty to compressing the .exe ?
Currently, one of the compressed executables is 486,400 bytes.
Uncompressed, it is 1,076,224 bytes.
I welcome your opinions.
In case of your setup IMHO the compressed .exe has no advantages, the
decompressing operation ( aka UnZip )
- eats the serv...C.H.I.P. The $9 1GHz ARM Linux computer with 4GB flash + 512MB RAM
C.H.I.P. The $9 1GHz ARM Linux computer with 4GB flash + 512MB RAM
Orders and Funding have gone through the roof.
On 09/05/2015 02:00 pm, 7 wrote:
> C.H.I.P. The $9 1GHz ARM Linux computer with 4GB flash + 512MB RAM
> Orders and Funding have gone through the ...urgent help in image compression
i doing a project in image compression but not all the image i first
decompose it by wavelet decomposition then compress only the the
detail parts(vertical, horizontal and digonal)
and iam looking for an efficient compression algorithm for
and asking if i can only add a quantization part then entropy but i
dont know how and which type should i use
so ,please any one know anything about this and can give me any
simple guide i will be very thankful
i used the compression matlab programs in matlab center but i didnt
get agood result
i hope to read any replay
thanks in all the cases
...Re: how to sample compressed dataset? #4
On Tue, 29 Jul 2008 13:36:18 -0400, Jeff <zhujp98@GMAIL.COM> wrote:
>12 data orig.claims;
>13 do pickit=1 to totobs by 20;
>14 set origdata.claims point=pickit nobs=totobs;
>ERROR: The POINT= data set option is not valid for the data set
>ORIGDATA.CLAIMS, the data set must be
>accessible by observation number for POINT= processing.
>NOTE: The SAS System stopped processing this step because of errors.
>WARNING: The data set ORIG.CLAIMS may be incomplete. When this step was
>stoppe...RE: Need help with apack compression code
try google: "python apack" found several
in general, always google first; python has so many devotees that someone
has generally solved most problems already.
Behalf Of priya kale
Sent: Thursday, March 15, 2007 11:33 PM
Subject: Need help with apack compression code [html-removed]
I need to code for decompressing the file which is compressed using Apack, I
am supposed to code it in visual c++, Plz...US-TX-Austin: Vignette Developer, v6 expert /v7 exp., Java, VAP.VCM; C-H (45313414412)
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...folder compression hangs
Deleted a few old saved mails and when I exited Pegasus (version 4.02)
the program tries to compress folders. But it's hanging and I have to
end the task. Will give the warning message at next startup which I
can clear by removing the mailbox lock file, but now tries to compress
every time I exit and every time it hangs.
On 04 Aug 2006, email@example.com (j) wrote in
> Deleted a few old saved mails and when I exited Pegasus (version
> 4.02) the program tries to compress folders. But it's hanging and
...survey on compression
is there some articles, etc. that present an *exhaustive* survey of the different audio compression methods
known today ?
thanks in advance !
...Problems Printing with H/P Plotter
I have been having problems printing assembly drawings with bill of
materials, and large detail sheets with hole charts, this also includes
multiple sheet drawings and assemblies.
My system specs are
P4 ~ Dell Workstation ~ 2.8 Ghz.
128 or 256 MB Video (can't remember)
Windows XP Pro OS
I am plotting to a HP 488CA large ink jet color printer can print up to a
The problem is this.
If I print an Assembly with or without a BOM, the drawing border will print
with no text in the title block, the BOM text will print with only the
vertical lines showing, t...Compression Qs from a Compression Newbie
When compressing something, what are all the factors used to evaluate
how helpful / good the compression method is, in general, and in a
I am interested in finding ways to compress combinations of data that
include time / date information about the functioning of an operating
system, video data collected under the same o.s., and parts of the o.s.
software itself. Does anyone have any experience with anything like
this and would anyone have any helpful pointers? I am hoping that
patterns or redundancies in the data can be used to compress it.
Any helfup input appreciated,