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Vashisht Developers
Vashisht Developers
Saturday, March 1, 2014
Thursday, January 23, 2014
It's Not All About Megapixels!
Many, from experts to engineers agree that megapixel count has been promoted (by camera stores and camera companies) as a misleading marketing gimmick for years. My argument—and my test—maintains that 5 or 6 megapixels is plenty for enlargements up to, say, 16-by-24 inch posters.
There were still a few naysayers who don't believe the results. This one was typical: "Why do you insist in calling it a pixel myth? Other things being equal, 8 megapixels DOES give a higher quality than 5; you just can't see it."
(Um, dude? If you can't see any difference, then it's not higher quality.)
In this Article, I'd like to expound upon a couple of points that my print column didn't have room for.
First, one reason WHY a few more megapixels don't produce any visual differences in the print.
Let me tease you first with this question: How much bigger can I print a 10-megapixel photo than a 5-megapixel photo?
Most people answer, "twice as big" or even "four times as big."
But they're wrong. In fact, doubling the megapixels of a photo actually lets you add only 20 percent more area to each edge.
Here's the math. A 5-megapixel photo might measure 1944 x 2592 pixels. When printed at, say, 180 dots per inch, that's about 11 by 14 inches.
A 10-megapixel photo (2736 x 3648 pixels), meanwhile, yields a 180-dpi print that's about 15 by 20 inches—under three inches more on each margin!
Upping the resolution by even smaller amounts (from 5 to 7 megapixels, for example) produces an even tinier difference—too small to bother with.
Meanwhile, cramming more pixels onto a camera's sensor can actually LOWER the quality of the photo. A former Kodak manager wrote to explain it this way: "Too many megapixels can actually impair a camera's performance. For example, the typical sensor in a consumer camera is 0.5-0.7 inches. The more millions of pixels, the smaller each pixel must be—and the smaller the pixel, the less light-gathering efficiency it has, and the worse the camera performs in low-light or stop-action shots."
Now then: At the end of the Article, I pointed out that megapixels have become a handy crutch for consumers shopping for a camera. They'd come to rely on it as a letter grade that made comparison shopping easy—and camera makers exploited this fact. "Well, heck, this one has 10 megapixels! That's a lot better than this 6-megapixel model!"
But a million factors are far more important than the megapixels. The question is: Can we come up with a new one-digit crutch? Can we propose a more meaningful comparison factor?
Lots of you said yes, the sensor size is far more important. After all, it's undisputed that a 6-megapixel Nikon D40 digital S.L.R. takes better pictures than a 10-megapixel shirt-pocket camera, because its sensor is relatively gigantic. Its individual pixel sensors can be larger and soak in more light, even if there are fewer of them.
Unfortunately, the camera makers and salespeople aren't going to help you out here. You're not going to see starbursts in the ads saying, "3/4-INCH SENSOR"! But you should.
If you can do the math—you can find sensor sizes reported at camera-review Web sites, like steves-digicams.com, dpreview.com, and dcresource.com—you'll be well rewarded. There are a million factors to consider when you buy a camera, but this one's a fairly good predictor of picture quality.
"Incidentally, where the megapixel myth really goes berserk is with camera phones. Limited real estate forces the camera modules to be tiny, which means that the pixels get tiny--well under 2 microns--when the marketing people force the engineers to increase the pixel counts, because megapixels sell. Unfortunately, tiny pixels are noisy, work poorly in low light, and may not be utilized due to a physical phenomenon called lens diffraction. Engineers are well aware of the problems, and they keep butting heads with the marketing people.
There were still a few naysayers who don't believe the results. This one was typical: "Why do you insist in calling it a pixel myth? Other things being equal, 8 megapixels DOES give a higher quality than 5; you just can't see it."
(Um, dude? If you can't see any difference, then it's not higher quality.)
In this Article, I'd like to expound upon a couple of points that my print column didn't have room for.
First, one reason WHY a few more megapixels don't produce any visual differences in the print.
Let me tease you first with this question: How much bigger can I print a 10-megapixel photo than a 5-megapixel photo?
Most people answer, "twice as big" or even "four times as big."
But they're wrong. In fact, doubling the megapixels of a photo actually lets you add only 20 percent more area to each edge.
Here's the math. A 5-megapixel photo might measure 1944 x 2592 pixels. When printed at, say, 180 dots per inch, that's about 11 by 14 inches.
A 10-megapixel photo (2736 x 3648 pixels), meanwhile, yields a 180-dpi print that's about 15 by 20 inches—under three inches more on each margin!
Upping the resolution by even smaller amounts (from 5 to 7 megapixels, for example) produces an even tinier difference—too small to bother with.
Meanwhile, cramming more pixels onto a camera's sensor can actually LOWER the quality of the photo. A former Kodak manager wrote to explain it this way: "Too many megapixels can actually impair a camera's performance. For example, the typical sensor in a consumer camera is 0.5-0.7 inches. The more millions of pixels, the smaller each pixel must be—and the smaller the pixel, the less light-gathering efficiency it has, and the worse the camera performs in low-light or stop-action shots."
Now then: At the end of the Article, I pointed out that megapixels have become a handy crutch for consumers shopping for a camera. They'd come to rely on it as a letter grade that made comparison shopping easy—and camera makers exploited this fact. "Well, heck, this one has 10 megapixels! That's a lot better than this 6-megapixel model!"
But a million factors are far more important than the megapixels. The question is: Can we come up with a new one-digit crutch? Can we propose a more meaningful comparison factor?
Lots of you said yes, the sensor size is far more important. After all, it's undisputed that a 6-megapixel Nikon D40 digital S.L.R. takes better pictures than a 10-megapixel shirt-pocket camera, because its sensor is relatively gigantic. Its individual pixel sensors can be larger and soak in more light, even if there are fewer of them.
Unfortunately, the camera makers and salespeople aren't going to help you out here. You're not going to see starbursts in the ads saying, "3/4-INCH SENSOR"! But you should.
If you can do the math—you can find sensor sizes reported at camera-review Web sites, like steves-digicams.com, dpreview.com, and dcresource.com—you'll be well rewarded. There are a million factors to consider when you buy a camera, but this one's a fairly good predictor of picture quality.
"Incidentally, where the megapixel myth really goes berserk is with camera phones. Limited real estate forces the camera modules to be tiny, which means that the pixels get tiny--well under 2 microns--when the marketing people force the engineers to increase the pixel counts, because megapixels sell. Unfortunately, tiny pixels are noisy, work poorly in low light, and may not be utilized due to a physical phenomenon called lens diffraction. Engineers are well aware of the problems, and they keep butting heads with the marketing people.
Ethical Hacking:Doing Wrong Things The Right Way
Ethical hacking, also known “The White Hat” as penetration testing, intrusion testing or red teaming is used to find loopholes in an IT system and break into it. An ethical hacker is a computer and network expert who attacks a security system on behalf of its owners, seeking vulnerabilities that a malicious hacker could exploit. This work is ethical because it is performed to increase the safety of the computer systems, but only at the request of the company that owns the system and specifically to prevent others from attacking it. With the increasing use of the internet, it has become an essential part of IT security industry today.
Industry status
Last year ethical hacking was estimated to be a US$ 3.8 billion industry in the US alone. According to Nasscom, India will require at least 77,000 ethical hackers every year whereas we are producing only 15,000 in a year, currently. Ethical hacking is growing at a tremendous pace and offers a plethora of lucrative job opportunities.
Government fields
Government departments like CBI, Military Intelligence, R&AW.They Need Highly skilled ethical hackers in their cyber cells to get information on various suspicious criminal and terrorist activities.They need highly skilled brains on watch 24x7 to keep safe their servers and sensitive data. As the criminals are becoming more and more Skilled, even more skilled people are needed.
Skillset required
First and foremost is the ability to write programmes in many programming languages like C, C++, Perl, Python, and Ruby. For those working with web applications, Microsoft .NET and PHP are vital. Knowledge of assembly language is also essential for those who want to analyse disassembled binaries. Knowledge of a variety of operating systems (Microsoft Windows, various versions of Linux, etc) is critical. Experience with various network devices, including switches, routers and firewalls is also important. An ethical hacker also should have a basic understanding of TCP/IP protocols such as SMTP, ICMP and HTTP. In addition to technical skills, an ethical hacker needs good soft skills. Perhaps the most important skill, however, is adaptability. When testing software and systems, ethical hackers never know what will come up, so the ability to be resourceful is vital.
Growth areas
The information security industry is going at a current worldwide growth rate of 21%. Frost & Sullivan have estimated that there are 2.28 million information security professionals worldwide which is expected to increase to nearly 4.2 million by 2015. The need for information security for security compliance in India is mandatory for all companies with an IT backbone. The requirement for such personnel is especially high with organisations in the IT/ITES space.
Remuneration
A fresher may work as an intern for a couple of months and can start with a minimum of Rs 4.5 lakh per annum. With one year of experience, one can expect upto Rs 10-12 lakh per annum. Those with work experience five years or more can get 20+ lakh per annum.
Industry status
Last year ethical hacking was estimated to be a US$ 3.8 billion industry in the US alone. According to Nasscom, India will require at least 77,000 ethical hackers every year whereas we are producing only 15,000 in a year, currently. Ethical hacking is growing at a tremendous pace and offers a plethora of lucrative job opportunities.
Government fields
Government departments like CBI, Military Intelligence, R&AW.They Need Highly skilled ethical hackers in their cyber cells to get information on various suspicious criminal and terrorist activities.They need highly skilled brains on watch 24x7 to keep safe their servers and sensitive data. As the criminals are becoming more and more Skilled, even more skilled people are needed.
Skillset required
First and foremost is the ability to write programmes in many programming languages like C, C++, Perl, Python, and Ruby. For those working with web applications, Microsoft .NET and PHP are vital. Knowledge of assembly language is also essential for those who want to analyse disassembled binaries. Knowledge of a variety of operating systems (Microsoft Windows, various versions of Linux, etc) is critical. Experience with various network devices, including switches, routers and firewalls is also important. An ethical hacker also should have a basic understanding of TCP/IP protocols such as SMTP, ICMP and HTTP. In addition to technical skills, an ethical hacker needs good soft skills. Perhaps the most important skill, however, is adaptability. When testing software and systems, ethical hackers never know what will come up, so the ability to be resourceful is vital.
Growth areas
The information security industry is going at a current worldwide growth rate of 21%. Frost & Sullivan have estimated that there are 2.28 million information security professionals worldwide which is expected to increase to nearly 4.2 million by 2015. The need for information security for security compliance in India is mandatory for all companies with an IT backbone. The requirement for such personnel is especially high with organisations in the IT/ITES space.
Remuneration
A fresher may work as an intern for a couple of months and can start with a minimum of Rs 4.5 lakh per annum. With one year of experience, one can expect upto Rs 10-12 lakh per annum. Those with work experience five years or more can get 20+ lakh per annum.
Friday, January 17, 2014
Bored of Your Android Interface...???...Try This!!!!
Awesome apps that can change your old boring Android Interface.
You have often wondered ,how you want to change your old android interface.
If you are bored of your old interface,check out the new apps that can change the look,experience on your device.
1. Aviate
One of the recent launching app for android,its really a primarily launcher which replaces your default Android launcher app.It gives a lot new experience in its new pattern of home screens ,folders,notification bars and drawers.Its totally different from the default UI. The Aviate has a complete different approach, it keeps changing according to your usage (as well as your location and time during a day). Suppose you are travelling,this app can suggest you the music that suits for the location, the navigation apps and even foursquare(app which can tell you where you can go out to meet friends at the moment).The interesting feature of this app is that the launcher keeps learning as your usage increases which is really interesting.As we all know ,nothing is perfect, minor bugs have been detected which are needed to be cleared by the developers.Well you won't find any serious issues like crashes or lags.
Aviate is available on Google playstore.
To download Aviate click on the link below.
http://bit.ly/1cApGJr
2.Themer
Well this one is really cool in its layout, homescreen(which are customizable).This is same as Aviate which is launcher app for the default android launcher. Themer is developed by MyColorScreen .Well this one is the one of the best app if wish to create(more specifically transform) your Android Smartphone's looks and layouts.Currently there are more than 55000 unique homescreens at themers for you to download(depends on the specification of the device).At first , you may find difficult in managing the layouts and designs as every design and layout differ from one another,but if you starts understanding it,it is the best,amazing ,cool UI you can get.
You have often wondered ,how you want to change your old android interface.
If you are bored of your old interface,check out the new apps that can change the look,experience on your device.
1. Aviate
One of the recent launching app for android,its really a primarily launcher which replaces your default Android launcher app.It gives a lot new experience in its new pattern of home screens ,folders,notification bars and drawers.Its totally different from the default UI. The Aviate has a complete different approach, it keeps changing according to your usage (as well as your location and time during a day). Suppose you are travelling,this app can suggest you the music that suits for the location, the navigation apps and even foursquare(app which can tell you where you can go out to meet friends at the moment).The interesting feature of this app is that the launcher keeps learning as your usage increases which is really interesting.As we all know ,nothing is perfect, minor bugs have been detected which are needed to be cleared by the developers.Well you won't find any serious issues like crashes or lags.
Aviate is available on Google playstore.
To download Aviate click on the link below.
http://bit.ly/1cApGJr
2.Themer
Well this one is really cool in its layout, homescreen(which are customizable).This is same as Aviate which is launcher app for the default android launcher. Themer is developed by MyColorScreen .Well this one is the one of the best app if wish to create(more specifically transform) your Android Smartphone's looks and layouts.Currently there are more than 55000 unique homescreens at themers for you to download(depends on the specification of the device).At first , you may find difficult in managing the layouts and designs as every design and layout differ from one another,but if you starts understanding it,it is the best,amazing ,cool UI you can get.
Well this app is working for all android 4.1 smartphones(not sure about
working in tablets,as it still in developing for big screens).
Themer is available on Google playstore.
To download Themer click on the link below.
3. GO Launcher EX
This is the most popular and downloaded launcher app for
Android.It contains vast range of customizable themes,making it so
popular, perhaps the most downloaded launcher app for Android
Smartphones. The appreciative feature of this app is that is that you
can customize your icons,wallpaper and lock-screen with lots of themes
and patterns. And other important feature is that ,you can change the
launcher app to default Android app launcher easily.(It also contains
Alienware theme)
GO launcher EX is available on Google playstore.
To download GO Launcher EX click on the link below.
4.Cover
Its just like Aviate, the app learns according to your usage and
keeps updated with your location and the time of the day. Well it seems
it is made for screen lock app if you use Android device(more
specifically smartphones).The latest and most recently used apps are
placed at the top in a clean looking screen. This launcher is good ,user
friendly.This app is handy in checking the updates and needed
downloads.
Cover is available on Google playstore.But in some regions ,it may not.
To download Cover click on the link below.
5. MIUI MiHome Launcher
MIUI MiHome Launcher is one of the most easy to use apps as it
initially changes the looks of layout of your Android interface rather
than completely replacing the design pattern.Another feature is it has
its own lock screen, its own wallpaper ,icons and widgets.This app is
developed by Xiaomi, a chinese smartphone and app maker.The launcher app
can be used in Android devices using 2.3 and above. Many variety of
customizable themes are available at Xiaomi's store.
MIUI MiHome Launcher is available on google playstore.
To download MIUI MiHome Launcher click on the link below.
Facebook Safety
Here's a way to keep your Facebook account still safe if you forgot to logout due to a power shortage/blackout or if you are using a public computer (internet cafe).
Try this method:
Steps:
1. Log in to Facebook from your own computer.
2. Click `Account Settings` and then click `Security`
3. Click `Edit` button near to `Active Sessions`.
4. You can see the Active Sessions , End all Sessions by clicking `End Activity`.
5. There You Go! You're currently logged-in account on a public computer is now logged-out
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