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	<title>Achu&#039;s TechBlog</title>
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	<link>http://achuwilson.wordpress.com</link>
	<description>Electronics, Robotics,Image Processing, Embedded, hacking, RF electronics etc...etc</description>
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		<title>Achu&#039;s TechBlog</title>
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		<item>
		<title>HSV Pixel Values in OpenCV</title>
		<link>http://achuwilson.wordpress.com/2012/02/14/hsv-pixel-values-in-opencv/</link>
		<comments>http://achuwilson.wordpress.com/2012/02/14/hsv-pixel-values-in-opencv/#comments</comments>
		<pubDate>Tue, 14 Feb 2012 17:40:52 +0000</pubDate>
		<dc:creator>achuwilson</dc:creator>
				<category><![CDATA[OPENCV]]></category>
		<category><![CDATA[HSV]]></category>
		<category><![CDATA[opencv]]></category>

		<guid isPermaLink="false">http://achuwilson.wordpress.com/?p=489</guid>
		<description><![CDATA[HSV color space is more often used in machine vision owing to its superior performance compared to RGB color space in varying illumination levels. Often thresholding and masking is done in HSV color space. So it is very important to know the HSV values of the color which we want to filter out. HSV color [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=achuwilson.wordpress.com&amp;blog=18612494&amp;post=489&amp;subd=achuwilson&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<slash:comments>0</slash:comments>
	
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			<media:title type="html">achuwilson</media:title>
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		<item>
		<title>Chippu gets new Hardware</title>
		<link>http://achuwilson.wordpress.com/2012/02/14/chippu-gets-new-hardware/</link>
		<comments>http://achuwilson.wordpress.com/2012/02/14/chippu-gets-new-hardware/#comments</comments>
		<pubDate>Tue, 14 Feb 2012 07:49:31 +0000</pubDate>
		<dc:creator>achuwilson</dc:creator>
				<category><![CDATA[Microcontrollers]]></category>
		<category><![CDATA[Projects]]></category>
		<category><![CDATA[ROS]]></category>
		<category><![CDATA[arduino]]></category>
		<category><![CDATA[avr]]></category>
		<category><![CDATA[chippu]]></category>
		<category><![CDATA[components]]></category>
		<category><![CDATA[DIY]]></category>
		<category><![CDATA[motor controller board]]></category>
		<category><![CDATA[robot controller]]></category>
		<category><![CDATA[Wiring]]></category>

		<guid isPermaLink="false">http://achuwilson.wordpress.com/?p=483</guid>
		<description><![CDATA[Chippu has now upgraded its hardware, and is now much smarter. The Atmega32 is replaced by a more powerful and feature rich Atmega128 based Wiring Board. It has  53 I/O pins, 8 analog inputs, 2 hardware serial ports, 6 PWM (analog outputs), SPI, TWI, 8 external interrupts pins. Also it can drive a maximum of 24 [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=achuwilson.wordpress.com&amp;blog=18612494&amp;post=483&amp;subd=achuwilson&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://achuwilson.wordpress.com/2012/02/14/chippu-gets-new-hardware/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
	
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			<media:title type="html">13022012526</media:title>
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			<media:title type="html">13022012541</media:title>
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	</item>
		<item>
		<title>WIRING: a low cost alternative to Arduino</title>
		<link>http://achuwilson.wordpress.com/2012/02/13/wiring-a-low-cost-alternative-to-arduino/</link>
		<comments>http://achuwilson.wordpress.com/2012/02/13/wiring-a-low-cost-alternative-to-arduino/#comments</comments>
		<pubDate>Mon, 13 Feb 2012 19:03:55 +0000</pubDate>
		<dc:creator>achuwilson</dc:creator>
				<category><![CDATA[Hacks]]></category>
		<category><![CDATA[Microcontrollers]]></category>
		<category><![CDATA[arduino]]></category>
		<category><![CDATA[avr]]></category>
		<category><![CDATA[chippu]]></category>
		<category><![CDATA[DIY]]></category>
		<category><![CDATA[robot controller]]></category>
		<category><![CDATA[RS232]]></category>
		<category><![CDATA[USB to sserial]]></category>
		<category><![CDATA[Wiring]]></category>

		<guid isPermaLink="false">http://achuwilson.wordpress.com/?p=470</guid>
		<description><![CDATA[I was using an Atmega32 based Arduino  clone for the low level hardware control of  my personal robot Chippu. But soon ran  into problems  as the code size increased and  the inbuilt RAM of 2kb overflowed often, and it caused the ROS node running on Arduino to go out of sync. Also I needed to [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=achuwilson.wordpress.com&amp;blog=18612494&amp;post=470&amp;subd=achuwilson&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://achuwilson.wordpress.com/2012/02/13/wiring-a-low-cost-alternative-to-arduino/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
	
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			<media:title type="html">achuwilson</media:title>
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			<media:title type="html">PinsWiringV1.0</media:title>
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			<media:title type="html">13022012532</media:title>
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			<media:title type="html">order1</media:title>
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			<media:title type="html">a</media:title>
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	</item>
		<item>
		<title>Indian Online Shops selling Electronics &amp; Robotics Components</title>
		<link>http://achuwilson.wordpress.com/2012/01/30/indian-online-shops-selling-electronics-robotics-components/</link>
		<comments>http://achuwilson.wordpress.com/2012/01/30/indian-online-shops-selling-electronics-robotics-components/#comments</comments>
		<pubDate>Mon, 30 Jan 2012 14:52:44 +0000</pubDate>
		<dc:creator>achuwilson</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[components]]></category>
		<category><![CDATA[online shops]]></category>

		<guid isPermaLink="false">http://achuwilson.wordpress.com/?p=452</guid>
		<description><![CDATA[There are a handful of online shops in india that provides electronics components. Some of them specilizes in robotics components alone, while some specializes in embedded boards, while some others provides all types of components and boards. The prices of the same component varies greatly among different shops, so it is wise to refer as [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=achuwilson.wordpress.com&amp;blog=18612494&amp;post=452&amp;subd=achuwilson&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://achuwilson.wordpress.com/2012/01/30/indian-online-shops-selling-electronics-robotics-components/feed/</wfw:commentRss>
		<slash:comments>2</slash:comments>
	
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			<media:title type="html">achuwilson</media:title>
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		<item>
		<title>Chippu Speech Recognition</title>
		<link>http://achuwilson.wordpress.com/2012/01/11/chippu-speech-recognition/</link>
		<comments>http://achuwilson.wordpress.com/2012/01/11/chippu-speech-recognition/#comments</comments>
		<pubDate>Wed, 11 Jan 2012 11:45:00 +0000</pubDate>
		<dc:creator>achuwilson</dc:creator>
				<category><![CDATA[Projects]]></category>
		<category><![CDATA[ROS]]></category>
		<category><![CDATA[chippu]]></category>
		<category><![CDATA[Julius]]></category>
		<category><![CDATA[robot]]></category>
		<category><![CDATA[speech recognition]]></category>

		<guid isPermaLink="false">http://achuwilson.wordpress.com/?p=430</guid>
		<description><![CDATA[Chippu has easily learnt to recognize human speech. It uses Julius for speech recognition as explained in the previous post. The following video shows the speech recognition abilities of chippu. As you can see, it works flawlessly.  The complete source is available at the svn http://code.google.com/p/chippu/ The rxgraph output of the system looks like this: [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=achuwilson.wordpress.com&amp;blog=18612494&amp;post=430&amp;subd=achuwilson&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://achuwilson.wordpress.com/2012/01/11/chippu-speech-recognition/feed/</wfw:commentRss>
		<slash:comments>6</slash:comments>
	
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			<media:title type="html">achuwilson</media:title>
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		<media:content url="http://achuwilson.files.wordpress.com/2012/01/chippu_speech_recog.png" medium="image">
			<media:title type="html">rxgraph</media:title>
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	</item>
		<item>
		<title>Speech Recogition using Julius in Linux</title>
		<link>http://achuwilson.wordpress.com/2012/01/11/speech-recogition-using-julius-in-linux/</link>
		<comments>http://achuwilson.wordpress.com/2012/01/11/speech-recogition-using-julius-in-linux/#comments</comments>
		<pubDate>Wed, 11 Jan 2012 11:38:43 +0000</pubDate>
		<dc:creator>achuwilson</dc:creator>
				<category><![CDATA[Projects]]></category>
		<category><![CDATA[ROS]]></category>
		<category><![CDATA[chippu]]></category>
		<category><![CDATA[Julius]]></category>
		<category><![CDATA[speech recognition]]></category>

		<guid isPermaLink="false">http://achuwilson.wordpress.com/?p=416</guid>
		<description><![CDATA[Speech recognition in Linux is generally considered tough, but it can be done with very good results. Julian is a special version of Julius which performs grammar based speech recognition.  The video shows the the speech recognition in action. . As we can see, there occurs no error in the recognition of sentences. All Speech [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=achuwilson.wordpress.com&amp;blog=18612494&amp;post=416&amp;subd=achuwilson&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://achuwilson.wordpress.com/2012/01/11/speech-recogition-using-julius-in-linux/feed/</wfw:commentRss>
		<slash:comments>4</slash:comments>
	
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			<media:title type="html">achuwilson</media:title>
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		<item>
		<title>Chippu &#8211;  A Robot  to run ROS</title>
		<link>http://achuwilson.wordpress.com/2012/01/07/chippu-my-opensource-personal-robot/</link>
		<comments>http://achuwilson.wordpress.com/2012/01/07/chippu-my-opensource-personal-robot/#comments</comments>
		<pubDate>Sat, 07 Jan 2012 16:54:37 +0000</pubDate>
		<dc:creator>achuwilson</dc:creator>
				<category><![CDATA[Projects]]></category>
		<category><![CDATA[ROS]]></category>
		<category><![CDATA[chippu]]></category>

		<guid isPermaLink="false">http://achuwilson.wordpress.com/?p=379</guid>
		<description><![CDATA[  Lately i was busy in the hardware design of a personal robot named Chippu. It is an open source project and runs ROS, the same powerful code framework that runs on many robots like PR2. It is made as economical as possible. At present there is no on-board processing and it is done in [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=achuwilson.wordpress.com&amp;blog=18612494&amp;post=379&amp;subd=achuwilson&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://achuwilson.wordpress.com/2012/01/07/chippu-my-opensource-personal-robot/feed/</wfw:commentRss>
		<slash:comments>10</slash:comments>
	
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			<media:title type="html">achuwilson</media:title>
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		<media:content url="http://achuwilson.files.wordpress.com/2012/01/23122011006.jpg?w=768" medium="image">
			<media:title type="html">Chippu</media:title>
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			<media:title type="html">SNEHAL1147</media:title>
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			<media:title type="html">SNEHAL1151</media:title>
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			<media:title type="html">SNEHAL1150</media:title>
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			<media:title type="html">23122011008</media:title>
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			<media:title type="html">23122011006</media:title>
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		<item>
		<title>Jumping into ROS &#8211; The prerequisites</title>
		<link>http://achuwilson.wordpress.com/2011/12/20/jumping-into-ros-the-prerequisites/</link>
		<comments>http://achuwilson.wordpress.com/2011/12/20/jumping-into-ros-the-prerequisites/#comments</comments>
		<pubDate>Tue, 20 Dec 2011 13:49:31 +0000</pubDate>
		<dc:creator>achuwilson</dc:creator>
				<category><![CDATA[ROS]]></category>
		<category><![CDATA[arduino]]></category>
		<category><![CDATA[robot]]></category>

		<guid isPermaLink="false">http://achuwilson.wordpress.com/?p=360</guid>
		<description><![CDATA[Really you won&#8217;t look back if you jump into the world of open source robotics using ROS. The main advantage is that you will not end up re-inventing the wheel.  While ROS is used in many research laboratories and universities, you don&#8217;t have to be an academic to use it. The installation instructions of ROS are [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=achuwilson.wordpress.com&amp;blog=18612494&amp;post=360&amp;subd=achuwilson&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://achuwilson.wordpress.com/2011/12/20/jumping-into-ros-the-prerequisites/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
	
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			<media:title type="html">achuwilson</media:title>
		</media:content>

		<media:content url="http://achuwilson.files.wordpress.com/2011/12/roboparkour1111.jpg?w=300" medium="image">
			<media:title type="html">roboparkour111</media:title>
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		<item>
		<title>ROS &#8211;  An Operating System and Simulator for your Robot</title>
		<link>http://achuwilson.wordpress.com/2011/12/16/ros-an-operating-system-and-simulator-for-your-robot/</link>
		<comments>http://achuwilson.wordpress.com/2011/12/16/ros-an-operating-system-and-simulator-for-your-robot/#comments</comments>
		<pubDate>Fri, 16 Dec 2011 05:37:40 +0000</pubDate>
		<dc:creator>achuwilson</dc:creator>
				<category><![CDATA[ROS]]></category>
		<category><![CDATA[robot]]></category>
		<category><![CDATA[robot controller]]></category>

		<guid isPermaLink="false">http://achuwilson.wordpress.com/?p=351</guid>
		<description><![CDATA[Robot Operating System (ROS) is a software framework for robot software development, providing operating system-like functionality on a heterogenous computer cluster. It can be called a meta operating system and its development continues primarily at Willow Garage. The latest version of ROS is ROS Electric Emys. ROS provides standard operating system services such as hardware abstraction, low-level device control, implementation of commonly-used functionality, [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=achuwilson.wordpress.com&amp;blog=18612494&amp;post=351&amp;subd=achuwilson&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://achuwilson.wordpress.com/2011/12/16/ros-an-operating-system-and-simulator-for-your-robot/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
	
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			<media:title type="html">achuwilson</media:title>
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			<media:title type="html">electric_640w</media:title>
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		<item>
		<title>OpenCV SURF Robot</title>
		<link>http://achuwilson.wordpress.com/2011/12/15/object-detecting-picking-robot-using-opencv-surf/</link>
		<comments>http://achuwilson.wordpress.com/2011/12/15/object-detecting-picking-robot-using-opencv-surf/#comments</comments>
		<pubDate>Thu, 15 Dec 2011 12:57:03 +0000</pubDate>
		<dc:creator>achuwilson</dc:creator>
				<category><![CDATA[OPENCV]]></category>
		<category><![CDATA[Projects]]></category>
		<category><![CDATA[avr]]></category>
		<category><![CDATA[DIY]]></category>
		<category><![CDATA[gripper]]></category>
		<category><![CDATA[object detection]]></category>
		<category><![CDATA[opencv]]></category>
		<category><![CDATA[robot]]></category>
		<category><![CDATA[SURF]]></category>

		<guid isPermaLink="false">http://achuwilson.wordpress.com/?p=330</guid>
		<description><![CDATA[I built a small robot to detect an object using image processing techniques and when the object is found, it goes near to it and picks it up. OpenCV was used for image processing and it extracted SURF keypoints of the object (a 9V pp3 battery in this case), then extracted SURF Keypoints and Descriptors [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=achuwilson.wordpress.com&amp;blog=18612494&amp;post=330&amp;subd=achuwilson&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
		<wfw:commentRss>http://achuwilson.wordpress.com/2011/12/15/object-detecting-picking-robot-using-opencv-surf/feed/</wfw:commentRss>
		<slash:comments>4</slash:comments>
	
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