Tuesday, August 29, 2006

Bits n Bytes - GeoTagging snaps

Now you could GeoTag your snaps on Flickr or even use some 3rd party tools for doing it and then upload the map onto your Flickr profile. By Geotagging your snaps it gives more semantic sense to the snaps and would also help other viewers to know the place you have taken it.

Here is a quick explanation on how to do it. And this is how my Flickr map looks like

I remember having read (in some research paper talking about semantics in Image retrieval), that the new generation digital cameras would be having a GPS tracker built into them which would automatically tag the snap you have taken with its geographical coordinates. This geographical data would be encoded along with the other EXIF data of the snap. This simple act would be a big blessing for those researchers developing algorithms for implementing semantics in image retrieval engines/tools. By just knowing the location details of a snap one can extract a fair amount of relevant semantic information from the picture/photo.

Monday, August 28, 2006

Bits n Bytes - HDR Photography


Among the recent developments in digital photography, HDR seems to be having a great future. High Dynamic Range (HDR) photography uses an encoding format which permits a large range of pixel values enabling one to capture the full range of original light values of the scene. In practice an image is captured at several time instances and at multiple exposures; then these images are merged and while doing so one can enhance features like the shadows of high exposures etc. This kind of photography is used a lot in the development of games and computer graphics. for learning more about this technology visit


Photo Courtesy gabefarns

Tuesday, August 22, 2006

Humor : Downloading the Internet

found this rather funny joke on W3C site

Customer: "I want to download the Internet. Do I need a bigger hard disk?"

Download the Internet here

Sunday, August 20, 2006

Humor : Graduate Foodchain


found this cartoon on this site

Thursday, August 17, 2006

Travelogue : Rome, Italy


There are not many cities on par with Rome - the Eternal city. As the old saying goes "all roads lead to Rome", on each of these roads, no matter whichever way you turn you either see a ancient monuments, lavish fountains and huge crowd of tourists. While seeing the city its pretty easy to imagine what it must have been during the age of the Ceasars and Roman gladiators. Travelling around in Rome is pretty practical, a day ticket of 4 euros in the Metro is also valid in the City buses and one can cover all over the city using this ticket.

One can start from one end of the city and traverse across to the other end. There are innumerable monuments and places to see around Rome that it is almost difficult to see it all in one or 2 days. In my case I started from the North East section of the City (since my Hotel was close in there). Easily reachable by the Metro Stations of Barberini and Spagna on Line A, this area of Rome has among popular attractions Piazza di Spagna and Spanish Steps, Fontana di Trevi, Santa Maria della Vittoria etc. The Piazza di Spagna and the Spanish Steps have been a major touristic center of Rome since the early 19th century. Shaped like a bow and lined up by muted shuttered facades, this Piazza is crowded all day and (in summer) most of the night. The Trevi Fountain is the famous and larget fountain of Rome. Its central statue is the Neptune along with two Tritons on either side. It was originally built to serve as an aqua duct for the ancient Rome. It attracts huge number of tourists during day and night, who flock here to throw a coin into the water and make a wish. Huge gallons of water flowing create a sound which gives the whole place a surreal atmosphere. Santa Maria Maggiore is pretty close to the Termini Stazione and has a great blend of architectural styles ranging from early Christian and Baroque era. The Piazza della Republica is also a great attraction, especially in the night which serves an excellent shot for night photography.


The Vatican City, world capital of Catholicism, for sure is the reason why most of the tourists come to Rome. To enter the Vatican one has to wake up early and join thousands in the queue lined up to enter the Museum and the Cathedral. In my opinion its better to see the Bassilica first, if you arrive there around 0700 you can easily enter the St. Peter´s Basilica without any queue. While entering the St. Peter´s you are awestruck by the large number of detailed statues which overlook the square. The early morning sunrays also give an amazing shot of the Papal Altar and the Baldacchino for the avid photographers like me. Most of the great architects of the Baroque and Rennaisance era were involved in the design of the Basilica of St. Peter´s. The famous dome of Christendom was designed by Michelangelo. Once you have finished seeing the Cathedral, you have to join the long queue to enter the Museum and the Sistine Chapel. While standing in the queue you will have infinite time to have your breakfast and practice sleepwalking. The Vatican Museum has one of the oldest art collections apart from the Sistine Chapel and Raphael Rooms. The art galleries are divided into sections of Egyptian & Assyrian art, Greek & Roman art, Etruscan, medivial art and 15th - 19th century art. Raphael Rooms were actually Pope Julius II private apartments who had chosen Raphael to decorate the walls and cielings with his artwork. The Sistine Chapel displays the Fresco work done by Michelangelo. The paintings and graphics depict majorly Old and New Testaments like for example the Original Sin, the Creation of the Sun and Moon etc. As one strolls through the chambers s/he will seldom close his/her mouth as each one is as jaw-dropping as the earlier one. Arguably it is the most enthralling visits of Rome. The Castel Sant Angelo is another major attraction across the Vatican, and offers a good view of the Vatican for photographers from Ponte Sant Angelo. I took this night shot from there. To reach the Vatican one can take the Metro A till the Ottaviano stop.


After crossing the river Tevere, you come across the Piazza Navona. The major attraction of the square is the Fontana dei Quattro Fiumi. This magnificient fountain was done by Bernini and shows the statues of four great rivers (Nile, Plate, Danube and Ganges). The Piazza is a major social center of the city and has plenty of restaurants lined up all around punctuated by Baroque fountains. This fountain also appears prominently in the plot of the novel Angels & Deamons written by Dan Brown. A couple of blocks away is the Piazza della Rotonda along with the Pantheon. The Pantheon is the Roman "temple of all gods", is the most extraordinary and best preserved monument of the ancient Rome. Other major attractions in the vicinity are the Piazza della Minerva and Sant´Ignazio di Loyola.

The ancient center of the city has plenty of attractions. The Monumento a Vittorio Emanuele is an imposing white marble building beside the Roman Forum. It attracts a large number of tourists and has a museum with a free entry. This photogenic monument looks awesome in the night. It was built in honor of Victor Emanuele II the first king of unified Italy. Just behind this monument is the Roman Forum and its ruins of the ancient era.One can stroll through these ruins for free, which have been preserved amazingly over all these ages. Further ahead of the Roman Forum is the Colosseum, one of the most imposing monuments of ancient Rome.

The Colosseum was as amphitheater built on the orders of Emporer Vespasian. Several gladiators had fought beasts and other wild animals in the arena of this gigantic building. Walking inside the corridors is fascinating if you imagine what it must have been in the bygone era in all its glory, complete with thousands of Romans and one Julius Ceasar. Now you find many of the dressed up gladiators eagerly waiting for tourists to take snaps and make some money. Nearby are the ruins of the Palatine, which was once the residence of emperors and aristocrats. The ruins range from a simple house in which Augustus is assumed to have lived, to the Domus Flavia and Domus Augustana. From certain high altitudes of the Palatine one can take panoramic shots of the Roman skyline. Close to the Colosseum is the Metro stazione to connect you quickly with other major attractions of the city.

Eating is pretty decent in the several restaurants of the city, but if you want to save some quick bucks, you could do shopping in the several markets around the city, prominent among them are the ones aroung Campo di Fiori.

To see some more snaps I had taken in Rome visit my Gallery on Flickr and Webshots

Travelogue : Florence, Italy


The historical section of Florence is a compact area, with all the major tourist attractions in close vicinity of each other.Though the city is easily navigable by foot, one can even rent bicycles right from the Stazione for an hourly rate of 4 euros (tourists) or 1 euro (residents of Florence). Those who study arts and literature, for them visiting Florence is like taking a pilgrimage to see the artistic capital of the world. Writers such as Dante and Machiavelli, Painters and Sculptors like Michelangelo and Donatello have contributed to the reputated artwork on display in Florence.


Once could start touring from the Piazza San Marco, where the Convento di San Marco and Galleria dell´Accademia are start attractions. The Academy of Fine Arts was established in the 16th century to teach drawing, painting and sculpture techniques. The most famous work on display here is the Statue of David done by Michelangelo, however a copy of it is also on display at the Piazza della Signoria. The Palazzo Vecchio along with the Piazza della Signoria have been the heart of political life in Florence. There are several statues of the ancient Roman are on display at this square, including the Fontana di Nettuno. The Ponte Vecchio which is a couple of blocks from this Piazza is the oldest surviving bridge in the city. This bridge is a popular photographic attraction among the tourists who also flock at the several shops dealing with specialized jewellry and antique shops.


The most symbolic monument of Florence is the Duomo of Santa Maria del Fiore and naturally you find tonnes of tourists lining up to enter in each of the major attractions around the Piazza di San Giovanni. The interior of the orange-tiled dome is designed by Brunellschi, it also has frescoes of the Last Judgement. Colorful Neo-Gothic marble facade adorn the walls of the Chapel and Baptistry. The Baptistry also has colorful mosaics illustrating the Last Jusdgement decorating its cielings. When visiting Florence on a short time scale, bear in mind that most of these major buildings have strict visiting timings for tourists and plan your timings accordingly!


for more snaps from I took at Florence check out : Flickr and Webshots

Travelogue : Venice, Italy



This was my 3rd trip to Venice - the Gateway to the Orient. My earlier visits were on the Christmas day last year and once during the Venice Carnival in early spring this year. Yes I have been smitten by this city, as it has always captivated my fantasy since childhood, to see such beautiful buildings standing on water since so many ages. Venice was on my travel itinery of a brief Italian holiday along with some of my friends from Germany who had come come visiting me over this long weekend of Ferrogosto.


Each of my experiences of Venice have been different. The previous one was mainly the carnival festive mood in February. Exploring Venice is like going on a game of treasure hunt because of the narrow streets and bridges you come across. One can walk to most of the places of the city but to go to any of the islands you do have to take the motorboats. The only way to enter Venice from mainland Mestre is through the causeway leading to Piazzale Roma. The trains arrive at the Santa Lucia Stazione facing the Grand Canal. Travelling on a Vaporetto or the motor boat across the Grand Canal is the best way to view Venice. Almost all of the star attractions of the city are along this canal. Facing the Stazione is the domed church of San Simeone Piccolo which resembles the Pantheon of Rome. As the boat wades through the Grand Canal going towards the Rialto you see the Fondaco dei Turchi, a warehouse of Turkish traders in the past, but now houses the Natural History Museum. The Rialto Bridge spans the canal in the commercial heart of the city. Locals and tourists flock around the several food, vegetables and fish markets. Its a good place to watch and photograph the gondolas in the canal below. As you move further you come across the Ponte dell´Accademia (which hosts a large collection of Venetian paintings) and the Santa Maria della Salute just at the mouth of the Grand Canal. This huge Baroque church is supported by over a million timber piles.


The Piazza San Marco is the centerstage of action during the Carnival or as a matter of fact any event hosted in Venice. At the square you have the San Marco Bassilica and towards its side the Palazzo Ducale. The Basilica blends the architectural styles of East and West to create one of the popular buildings of Europe. The Facade Mosaics inside the dome are a popular attraction amongs tourists. The Palazzo Ducale was home to each of the Venetian rulers and its external appearance displays the art of the 14th century. I was lucky enough to see the high tide of the Mediterrainean, during which the water floods onto the square of San Marco. It occurs frequently during the months of August and September, I was told. When I was there, the water was upto my ankle level.


Venice is famous for its glassworks, and its island of Murano is the home to most of the glass factories. The Museo Vetrario has a large collection of antique pieces. Easy reachable from the mainland Venice on boat numbers 5, 41 and 42, Murano should be a must see list for all tourists coming to Venice. Burano is the most of the colorful islands of Venice, is famous for its lacework industry. A day ticket of about 12 euros allows you to use the vaporettos around the Grand Canal and also to any of the islands.


for images of Venice I had taken visit my gallery on Flickr and Webshots

Thursday, August 10, 2006

Bits n Bytes - Phenomenon of Sleep

Amongst some of the things that amazes me most about the human body is our cycle of sleep and in addition to it the complex and intriguing phenomenon of dreams. When we sleep, we are in either of the two stages of REM or NREM. REM stands for Rapid Eye Movement, is the period of sleep when the eye is in a constant motion, while NREM is Non-REM as the name suggests when there is no movement activity. An ordinary sleep is in cycles of around 90 mins in which the major portion (about 70 mins) is the NREM sleep, the small REM portion is the one in which we are popularly supposed to have our dreams and other bizzare visual experiences. However dreams can occur in the other parts of the sleep as well. Researchers have done tremendous analysis of this complex state of mind, sometimes using Electroencephalographic (EEG) patterns. In layman terms EEG patterns are measurements done on the brain signals and analysis is done based on certain types of waves characterized into - alpha, beta, gamma and delta waves. Each of the waves corresponds to a certain kind of activity. For some interesting reading and detailed introduction to this study check out the ever reliable Wikipedia

Whats surprising to me is that during our sleep, it has been observed that, we enter into a certain stage described as the true delta sleep - the deepest sleep, the EEG graphs sometimes show a near "flat line", which is reported by numerous people as having a near-death experience. Our religious books sometimes refer to phrases like "... in your sleep we take away your souls and return them back ..." (apparantly talking about the life-after-death phenomenon). Do both of these phenomenon mean the same? Your guess is as good as mine.

Sleep is a treasure to human beings, which cannot be achieved all the time. If you wish to sleep, the harder you try and concentrate on going to sleep the more horrible it will be and impossible it becomes. Problems related to sleeping and its associated remedies is a big study on its own. There is some interesting research on sleep analysis being done at University of Zurich and here is a good paper which describes a study on sleep using EEG analysis.

Friday, August 04, 2006

Bits n Bytes - Databases Programming Practices

In a slightly off-dated but worthwhile article on SQL programming conventions, Joe Celko, a premier SQL Guru writes " .... After more than 25 years of the relational model, people are still writing SQL as if it were a 1950s punch card file system. It takes time for a new tool to find its own voice. Motion pictures were originally shot from a fixed position because that is how people viewed stage plays. The engine in a car is in front because that is where the horse went. ... " for further reading visit

for further references check out -

Tuesday, August 01, 2006

Bits n Bytes - Tools based on Google

Last weekend I stumpled upon this site maintained by one Douwe Osinga - on the outset it looks quite interesting for those of you Google-culties. It contains several projects and interesting fundoos based on Google .... I found these to be worth trying