SEARCH KEYWORD -- Lossless compression
Lossless and Transparency Encoding in WebP
In September 2010 we announced the WebP image format with lossy compression. WebP was proposed as an alternative to JPEG, with 25–34% better compression compared to JPEG images at equivalent SSIM index. We received lots of feedback, and have been busy improving the format.Last month we announced WebP support for animation, ICC profile, XMP metadata and tiling. Today, we introduce a new mode in WebP to compress images losslessly, and support for transparency â€...
Google,WebP,Image,Compress, Lossless compression,Transparency 2011-11-18 08:48:33
GoLang to build smaller executable file
Normally the executable file built with go is a bit large, it is always desired that a smaller executable file should be generated though. In this post, a couple of ways to reduce the size of the executable will be introduced. The end effect is that the executable file size would be much less than the normal generated one. The file which is built normally has below size. Mode LastWriteTime Length Name ---- ------------- ------ ---- -a---- 12/14...
GOLANG,EXECUTABLE 2019-12-13 20:10:45
Big file transfer in Linux
It's very common that we need to transfer files between two different hosts such as backups. It is also an very simple task, we can use scp or rsync to complete the task well. But what if the file is very big, it may take some time to transfer it. How can we transfer a big file with high speed? Here we propose one solution. Copy file If we copy one uncompressed file, then we should follow below steps: Compress data Send it to another host Uncompress the data Verify the data integrity This will...
How to password protect a Winzip file
Winzip files are great ways of sharing documents and images of large sizes over the web or through email, since their reduced size makes it possible for them to be sent and received. Also, it is easier to manage one attachment than multiple. But what if the file contains sensitive information you don’t want snoopers to see? Simply add a password protection in Winzip. Adding a password will ensure more security and reliability of the transported files. How to add a Password to your Zip Fil...
DATA SECURITY,WINZIP 2019-08-29 11:42:41
About JavaScript source map
Last week jQuery 1.9 was released. This is the last release before jQuery 2.0. It adds many new functions, one of them is the source map. By accessing http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js , you can scroll to the last line and you will see below line :  //@ sourceMappingURL=jquery.min.map This is source map, it is a separate file and it is put at the same directory as the source file. You can click here and see what it looks like. It's an very useful functio...
Source map, JavaScript, jQuery 2013-02-01 07:06:44
Collection Of Puzzles For Programmers
Did you know that we have a nice collection of puzzles here on less than dot? Some are harder than others so there is something for everyone. You can pic any language you want, you will see that there are solutions in Ruby, Python, Visual Basic, SQL, JavaScript, C++ and other. Here is a partial list of what we have Friday the Thirteenths The goal is to identify all friday the thirteenths for a given timeframe Regular Pentagon Given a grid co-ordinate (x,y) as the centre point of a regu...
Programming puzzle,Fibonacci,Prime,ASCII 2012-01-04 08:06:18
A guide on installing and running Clickhouse on macOS
ClickHouse is a high-performance open-source columnar database management system developed by Yandex. Here are some of the key features of ClickHouse: Columnar storage: ClickHouse uses a columnar storage format, which allows it to efficiently store and retrieve data by column, rather than by row. This results in much faster query performance, especially for analytical and aggregate queries. Real-time data processing: ClickHouse is designed to handle real-time data processing and can handle bill...
CLICKHOUSE,MACOS 2023-02-15 06:04:55
Create Packed Indexes with MySQL
I am pretty much sure that you are aware of indexes which we are creating on database fields. Indexes are very useful to make your query search faster and improve the site performance. But the fact is that Indexes which we are creating on database tables also require some additional space on your hard disk and if you have not properly created these indexes than some t...
MySQL,Compressed index,PACK_KEYS 2012-04-24 07:42:18
How to Convert Images on Mac Finder
If you have a lot of images in different formats and you want to convert them to a common format, you can use the Mac Finder to do it easily and quickly. Here are the steps to follow: 1. Open the Finder and navigate to the folder where your images are stored. 2. Select the images that you want to convert. You can use the Shift key or the Command key to select multiple images at once. 3. Right-click on the selected images and choose Services > Preview from the context menu. This will open the ...
MACOS,FINDER,IMAGE CONVERSION 2023-04-16 02:09:54
The faster-than-fast Fourier transform
The Fourier transform is one of the most fundamental concepts in the information sciences. It’s a method for representing an irregular signal — such as the voltage fluctuations in the wire that connects an MP3 player to a loudspeaker — as a combination of pure frequencies. It’s universal in signal processing, but it can also be used to compress image and audio files, solve differential equations and price stock options, among other things.The reason the Fourier...
FFT,Fast fourier transform,MIT,Compression 2012-01-19 09:59:09
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