Sorry for posting so late, actually I was busy in developing the blog and learning new codes, but I hope that this post would make you ha...Read more

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Sorry for posting so late, actually I was busy in developing the blog and learning new codes, but I hope that this post would make you happy and help you to forgive me.  

The Digital Camera

The word “photography” comes from Greek words which, combined, mean “to draw with

light” (from photos, or “light,” and graphis, or “drawing”). Photography is the technique of

recording fixed images on a light-sensitive surface. Digital cameras are based on the

principles of traditional photography, but, instead of fixing images on film coated with chemical

substances sensitive to light, they process the intensity of the light and store the data in digital

files. Modern digital cameras generally have multiple functions and are able to record sound and

video in addition to photographs.

The Digital System

The Sensor that Replaces Film

The CCD (charge-coupled device) is a group of small diodes sensitive to light

(photosites), which convert photons (light) into electrons (electric charges).

Binary system processing

To convert the electric charges of the

photosite (analog) to digital signals, the

camera uses a converter (ADC), which

assigns a binary value to each one of the

charges stored in the photosite, storing

them as pixels (points of color).

ADDITIVE MIXTURE

Each pixel is colored by mixing values of RGB.

Varying quantities of each of these colors can

reproduce almost any color of the visible

spectrum.

The value of each can vary from 0 (darkness)

to 255 (the greatest color intensity).

Resolution

is measured in PPIs, or pixels per square inch—

the number of pixels that can be captured by a

digital camera. This figure indicates the size and

quality of the image.

Compression and Storage

Once the image is digitized, a

microprocessor compresses the data in

memory as JPG or TIFF files.

Even mobiles are serving a good place in capturing images and videos, but still digital cameras are only option if your pretty serious in capturing pictures and their quality.
according to a survey during in 2006, it was found that 110 million number of digital cameras sold worldwide.

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Today I am posting some details about scanners, about how did they work.   well scanner is an important machine for offices, school a...Read more

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Today I am posting some details about scanners, about how did they work.  well scanner is an important machine for offices, school and collage works, any document related works. But Scanners are of many types, scanner which scans documents and converts them into digital data, bar-code scanner, computerized Tomography, finger print  and retina scanner, those who have got their uid or adhar card might know this, and there are myriad number of examples, so, without wasting much time let us jump into real thing    

Scanners

Several technologies that digitize, read, detect, and trace images, objects, or signals can be

grouped under this term. The better known are computer scanners and bar-code scanners,

but scanners are also used in medicine, biometric identification, security systems, and

detection of radio frequencies. Some computer scanners incorporate text-recognition software,

which can digitize printed, typed, or even handwritten text. This capability has been very useful in

digitizing a great amount of material at universities and libraries; however, it has also encouraged

pirating in publishing

How an Image Is Digitized

The scanner comes from the phrase “to scan.” An image is scanned by a head that transforms it into digital data.

1.THE ORIGINAL

can be any document with a flat surface, such as a photograph, a paper document, or a page in a book.

 

  

2. SCANNER HEAD

analyzes a photograph and converts it into digital information.

 

3.DIGITAL ARRAY

The data from the sensor are placed in an array

that is used in reconstructing the image

4. IN THE COMPUTER

The image, converted into numerical

data, is displayed on the computer. The

image can be retouched and enhanced

through specialized computer programs

Other Types of Scanners

I hope you had seen and enjoyed the previous posts about i pod & LCD TV . Today, i have come up with DVDs, While researching to cre...Read more

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I hope you had seen and enjoyed the previous posts about ipod & LCD TV.
Today, i have come up with DVDs, While researching to creating this post i found some astonishing facts, i hope your are going to become surprise to know how a DVD stores its data and how those data are read / fetched  from it.

DVD

The storage capacity of a DVD, six times that of a traditional CD, has revolutionized the way digital

data is organized and stored in the decade since its appearance in 1997. The DVD explosion

resounded in the world of home movies thanks to its capability of storing entire feature films,

bonus material, and subtitles (in various languages) on only one disc. The evolution of technology,

however, has not stopped with DVDs. Recent years have seen the introduction of discs able to hold 12

times the data of the DVD

Reading with Light

Optical discs (CDs and DVDs) are read by a

laser beam to obtain information. This

information is transformed into a binary electric

signal that is later interpreted and converted into

sounds, images, and data.

click on the images to enlarge

1.Laser emitter

generates a laser beam of

a specific wavelength.

2.Mirrors

guide the ray by working in

coordination.

3.  Direction

In order to read the disc,

the laser beam must strike

the surface of the disc

perpendicularly.

4. Lens

focuses the laser beam

before it reaches the surface

of the disc.

5. Reading

The laser beam strikes the

disc's reflective surface. The

reflection varies according

to the pattern of pits on the

disc's surface.

6. Prism

changes the direction of the

laser beam that reflects from

the disc and contains the

data read from the disc.

7. Photodiodes

translate the variations in the

returning laser beam and

convert them into a digital

signal.

Blue  light

Because blue light has a shorter wavelength than

red light (which is used in CDs and DVDs), a blue

laser makes it possible to read smaller pits, which

accounts for Blu-ray's greater storage capacity.

From the CD to Blu-ray
This comparison traces the evolution of the compact disc—especially its storage capacity.

CD

DVD

HDDVD

BR-DVD

Maximum capacity (single layer)	875MB	4.7 GB	15 GB	27 GB
Maximum capacity (double layer)	--	8.5 GB	30 GB	54 GB
Laser wavelength	789 nm	650 nm	405 nm	405 nm
Transfer rate in megabits per second (Mbps)	6	11.1/10.1	36.55	36/54
Resistance to scratches and dirt	No	No	No	Yes
Maximum video resolution	--	576 pixels	1,080 pixels	1,080 pixels
Supported formats	-- VCD and SVCD	DVD, VCD, SVCD, MPEG-2	MPEG-2, VC-1 (based on WMV), H.264/MPEG-4 AVC	MPEG-2, VC-1, MPEG-4 AVC

From the CD to Blu-ray, information storage has become

denser, and the wavelength of the reading beams has

become shorter.

1 millimeter = 1,000 micrometers (m)

1 micrometer = 1,000 nanometers (nm)

idm has now become a integral part of my system, but i didn't pay for it, nor i use any crack patch or key gen, instead i use  a smar...Read more

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idm has now become a integral part of my system, but i didn't pay for it, nor i use any crack patch or key gen, instead i use  a smart way to to do this. follow the steps and
you will find it easy.

Steps Involved:

Step1: Download the IDM trial or If you already have IDM installed Update it by going toHelp---}} then to check for Updates. 
 If you don't wanna update your version, Just click on Registration.


Step2: When you click on registration, Now a new dialog appears that is asking for Name, Last Name, Email Address and Serial Key. 


Step3: Now Enter you name, last name, email address and in field of Serial Key enter any of the following Keys: 

RLDGN-OV9WU-5W589-6VZH1
HUDWE-UO689-6D27B-YM28M 
UK3DV-E0MNW-MLQYX-GENA1 
398ND-QNAGY-CMMZU-ZPI39 
GZLJY-X50S3-0S20D-NFRF9 
W3J5U-8U66N-D0B9M-54SLM 
EC0Q6-QN7UH-5S3JB-YZMEK 
UVQW0-X54FE-QW35Q-SNZF5 
FJJTJ-J0FLF-QCVBK-A287M

And click on ok to register.


Step4: Now after you click ok, it will show an error message that you have registered IDM using fake serial key and IDM will exit. Now here the hack starts. 


Step5:<> Now Go to START --}} Then go to RUN  and type the following text and click enter:

 

notepad %windir%\system32\drivers\etc\hosts

                                                     
Step6: Now a notepad file appears something like this as shown below: 

Now copy the below lines of code and add to hosts file as shown above: 

127.0.0.1    tonec.com
127.0.0.1    www.tonec.com
127.0.0.1    registeridm.com
127.0.0.1    www.registeridm.com
127.0.0.1    secure.registeridm.com
127.0.0.1    internetdownloadmanager.com
127.0.0.1    www.internetdownloadmanager.com
127.0.0.1    secure.internetdownloadmanager.com
127.0.0.1    mirror.internetdownloadmanager.com
127.0.0.1    mirror2.internetdownloadmanager.com

After adding these piece of code, save the notepad file. And exit from there.

Now start your Internet download manager, and now you IDM has been converted to full version and specially when you update next time, your registration will not expire. That means it will remain full version for life time and you can update it without any problem.

for windows 7 you may get a window like this:

press yes, then go to the place where the "hosts" file is saved, now copy it,
go to C:\Windows\System32\drivers\etc   and replace this host file with your version.
that's it!