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Date: Tuesday, 01 Apr 2014 09:15
An update to HTCPCP (RFC 2324) to allow for the connection of networked tea-brewing devices. Published under the RFC Informational series.
Author: "--" Tags: "Articles"
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Date: Sunday, 05 May 2013 22:18
Continuing a series exploring the concepts behind JPEG image compression, this part begins delving into the relationship between the image, its colour constituents and the encoded data by breaking open the Start of Frame segment.
Author: "--" Tags: "Articles"
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Date: Sunday, 24 Feb 2013 22:06
Various levels of compression and encoding are employed in the production of a JPEG file. The first step in decompressing an image is decoding the data, which is compressed with a variant of Huffman encoding. This article looks at the data attached to a JPEG file which allows the Huffman decoding to proceed.
Author: "--" Tags: "Articles"
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Date: Sunday, 20 Jan 2013 11:30
Aside from the concepts explored in the previous part of this series, the JPEG file format is composed of segments which encode the various portions of information needed to decode an image. This article implements a simple method of traversing the segments of a JPEG file.
Author: "--" Tags: "Articles"
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Date: Saturday, 05 Jan 2013 00:03
The JPEG image format is a bit of a black box for many: files go in and images come out. Looking inside the box reveals a bunch of interesting algorithms and ideas, so writing a JPEG decoder makes for an interesting exercise. This article explores the concepts behind the compression techniques used by JPEG.
Author: "--" Tags: "Articles"
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Date: Saturday, 05 Jan 2013 00:03
The JPEG image format is a bit of a black box for many: files go in and images come out. Looking inside the box reveals a bunch of interesting algorithms and ideas, so writing a JPEG decoder makes for an interesting exercise. This article explores the concepts behind the compression techniques used by JPEG.
Author: "--" Tags: "Articles"
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Date: Wednesday, 03 Oct 2012 11:06
Ever run into a codebase with multiple Subversion repositories, where you just wanted to find out which branch they were all on without tediously cd'ing into each working copy? Try this script today, and make your life easier.
Author: "--" Tags: "Sub-articles"
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Date: Wednesday, 03 Oct 2012 11:06
Ever run into a codebase with multiple Subversion repositories, where you just wanted to find out which branch they were all on without tediously cd'ing into each working copy? Try this script today, and make your life easier.
Author: "--" Tags: "Sub-articles"
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Date: Wednesday, 27 Jun 2012 10:38
At deviantART's technology team meetup in France ('Breadlands 2012'), I gave a short Ignite talk distilling the first three articles in the Gameboy Emulation in Javascript series. The slides from that talk are now available here.
Author: "--" Tags: "Programming"
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Date: Wednesday, 27 Jun 2012 10:38
At deviantART's technology team meetup in France ('Breadlands 2012'), I gave a short Ignite talk distilling the first three articles in the Gameboy Emulation in Javascript series. The slides from that talk are now available here.
Author: "--" Tags: "Programming"
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Date: Tuesday, 24 Jan 2012 15:02
The day after the night before, a hungover flatmate notices that the wall mirror looks a bit strange. Speculative flash fiction.
Author: "--" Tags: "Fiction"
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Date: Saturday, 12 Nov 2011 18:16
There are a number of techniques for encrypting or hiding information within an image, including the concept of hiding a program within the image which itself prints the secret information. This article explores the feasibility of encoding a Brainfuck program within the bitmap data of an image, with a detailed run-through of a simple example.
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Date: Wednesday, 17 Aug 2011 19:06
Written on the theme of "thirty". On the far edge of the galaxy, a planet where only thirty stars are visible notices that one of the thirty has disappeared. Flash sci-fi.
Author: "--" Tags: "Fiction"
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Date: Saturday, 18 Jun 2011 21:30
Procedures for transmission of files over ASCII-text networks generally involve some form of encoding such as uuencode. When program executable files are being encoded for transmission, extra steps are required at the receiver before the program can be run. This article explores the concept of a program which has been encoded for an ASCII-text network, but can also be run directly without decoding; in this case, the article is limited to MS-DOS programs.
Author: "--" Tags: "Programming"
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Date: Saturday, 21 May 2011 22:40
Concluding an introduction to the development of augmented reality software, this part looks at implementing an edge detection algorithm overlaid on an Android smartphone's camera preview, and how the process can be optimised through use of the Android Native Development Kit.
Author: "--" Tags: "Articles"
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Date: Saturday, 21 May 2011 22:40
Concluding an introduction to the development of augmented reality software, this part looks at implementing an edge detection algorithm overlaid on an Android smartphone's camera preview, and how the process can be optimised through use of the Android Native Development Kit.
Author: "--" Tags: "Articles"
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Date: Thursday, 21 Apr 2011 19:07
One of the major current trends in smartphone applications is augmented reality: a view of reality with information laid on top. This can be as simple as a view of what the camera is currently seeing, with calculations based on position and direction. In the first of a two-part article series on Android development, this article looks at how to set up a camera view and access a canvas for the rendering of overlay information.
Author: "--" Tags: "Articles"
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Date: Thursday, 21 Apr 2011 19:07
One of the major current trends in smartphone applications is augmented reality: a view of reality with information laid on top. This can be as simple as a view of what the camera is currently seeing, with calculations based on position and direction. In the first of a two-part article series on Android development, this article looks at how to set up a camera view and access a canvas for the rendering of overlay information.
Author: "--" Tags: "Articles"
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Date: Friday, 25 Feb 2011 00:43
Like most computer and console systems, the GameBoy offers a hardware timer for use by games, if they wish to keep time more accurately than at the rate of vertical blanking refresh. In addition to a controllable timer, the GameBoy provides a facility for directly examining a fixed divisor of the system clock; in this article, both aspects of the timer are investigated, and the use of the timer for generating random numbers is also looked at, using the example of Tetris.
Author: "--" Tags: "Articles"
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Date: Friday, 25 Feb 2011 00:43
Like most computer and console systems, the GameBoy offers a hardware timer for use by games, if they wish to keep time more accurately than at the rate of vertical blanking refresh. In addition to a controllable timer, the GameBoy provides a facility for directly examining a fixed divisor of the system clock; in this article, both aspects of the timer are investigated, and the use of the timer for generating random numbers is also looked at, using the example of Tetris.
Author: "--" Tags: "Articles"
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