How a Digital Camera Works

 by: Jakob Jelling

The digital camera is not something of a magic box that came out of the blue and made wonders! The digital camera is very much like the conventional analog camera, but the technology has been altered. It also contains most of the associated components that the conventional camera contains, like lens and a shutter for letting in light, however instead of reaching a photosensitive film, the light is made to fall upon array of image sensors or photosensitive cells. Much of the differences are like this, yet most of it still remains in oblivion for the ordinary people. And it order that the digital camera gets its true respect, it is necessary to explore these areas of truth and reveal them in light.

Looking a bit more in details about the working of the fantastic device, the digital camera. As a continuation of the above lines, it can be further investigated that the sensor array is basically a microchip about 10 mm across. Every image sensor is a charged-couple device (CCD) converting light into electric charges, and is essentially a silicon chip used to measure light. These charges are stored as analog data that are then converted to digital via a device called an analog to digital converter (ADC). Over the chip are present a collection of very small light-sensitive diodes, named photosites, or pixels that convert light (or more scientifically, photons) into electrical charges called electrons. The pixels are very much light sensitive, therefore with brighter light striking them, produces greater build up of electrical charges. Each 1000 array receptor creates 1 pixel, and every pixel corresponds to some information stored. The light enters the digital camera via the lens, which is the same mechanism as the conventional analog camera. And this light hits the CCD when the photographer presses the shutter button. The shutter opens and thereby illuminates every pixel, however with various intensities.

Taking a look apart, it can be observed that quite a few digital cameras use CMOS (meaning complementary metal oxide semiconductor, a technology of manufacturing these microchips) technology based microchips as image sensors. The basic advantage is that the CMOS sensors are appreciably cheaper and simpler to fabricate than CCDs. Another great advantage from CMOS sensors is that these take very less power compared to other technology, which adds up to the fact as to their extensive use, and can thus even support the implementation of additional circuitry on the same chip like ADC, some control units etc. Thus it can be stated that CMOS technology based cameras are small, light, cheap and also energy efficient, yet at the cost of some amount of image quality.

However the common trend remains that all cameras of the mega pixel range and higher up use CCD chips instead of CMOS. This is because of the fact of picture quality only, leaving aside the price differences.

This is basically the fact about how digital cameras work! Having known this much difference would not come in the photographing expertise of the users, but it always feels a kind of satisfaction on understanding the inner depths of a device that is so close to the eyes!

By Jakob Jelling

http://www.snapjunky.com

CamMAricon WilliamsEverywhere in the world, in newspapers, in magazines, and at digital imaging professionals, millions of images are being analyzed and processed automatically everyday. We always want our pictures to look great. We are very much concerned with the subject, photo resolution and of course, the quality of photo printing. However, all our pictures can never turn out to be perfect. A few will come out to have unbalanced colors, poor resolution, and the like. But guys, theres nothing to worry if youll have similar problems in the future. The solution is the Binuscan PhotoPerfect DigiCam.

Today, the new Binuscan PhotoPerfect DigiCam is within everyone’s reach. This technology is the latest addition to Binuscans roster of digital cameras. It was just released last December 24, 2004. To achieve superbly corrected images, with perfectly adapted color balance, sharpness, contrast and saturation, dont think twice to use this great innovation. You dont have to be a professional photographer to utilize it. Also, you dont even need an advanced knowledge in digital imaging to obtain photos with dimensions fitting exactly the output requirements.

Binuscan PhotoPerfect DigiCam will take care of the rest for you, from image analysis by artificial intelligence, ReCo Technology correction, histogram optimization and reconstruction, crop and adjustment to the final dimensions, sharpness, and adaptive JPEG compression. These files are being saved at the desired location with the desired filenames. You are assured that youll have perfect results.

You can also apply over 50 special effects, whether artistic or funny to your images. Also, professional and high range conversion brings back the charm of black and white images. This is truly great to know, folks! With it, our creative imagination and artistic minds will surely work in the right way. We will be able to come up with our own works of art that all of us will truly be proud of. With it, we will be amazed by our digital images which will evolve from simple to most stylish and unwanted to most loved images.

Finally, I want to extend my conratulations to the developers of the Binuscan PhotoPerfect DigiCam and more power to all of you.

For comments, questions and additional information about the artilce you may log on at http://www.rushpostcardprinting.com

Police cameras a drain on batteries - Adelaide Now
POLICE have admitted there are “limitations” on how much electronic equipment, including video cameras on dashboards, can be put into patrol cars because of the danger of batteries being drained. There is also a danger of cameras “flying around the

KC Police: Red Light Cameras Too Effective - KCTV 5
KANSAS CITY, Mo. — Kansas City officials say cameras at 20 intersections in the city are catching enough red-light runners every three days to pay for operating the devices. The problem is, so many people are running red lights that the Police

Canon Cameras: Compact Digital, SLR, Digital SLR, and more
Find information for Canon cameras. Looking for something professional or user friendly? Canon has the solution. See digital cameras, SLR cameras, and compact film cameras.

Digital Camera Accessories - Digital Cameras
Shop for Digital Camera Accessories by brand - 3M, Aver Media, Axis Communications, Belkin, BTI, Canon, Coby, Corsair, D-Link, Digi Term, Edge Memory, Fellowes, Fuji, Gear Head

Epinions.com - Top 10 Film Cameras at Epinions.com
Epinions has the best comparison shopping information on Epinions.com - Top 10 Film Cameras at Epinions.com. Compare prices from across the web and read reviews from other

Digital Cameras 4 U
Business Networking is alot like great French bread the recipe for hosting a successful networking event are easy yet the way we combine them make the difference between a

B&H Photo Video | Digital Cameras, Camcorders
Shop Digital Cameras, 35MM Camera Equipment, Photo Printers, Home Theater, DVD Players, Authorized Dealer Canon, Sony, Nikon, Apple, Olympus, Panasonic, Kodak, JBL, Mino

Digital cameras - CNET Reviews
Come to CNET Reviews for digital camera reviews, CNET editors’ ratings, user reviews, and prices on digital cameras. Find the digital camera that’s right for you.

42photo.com - New York Camera Store, Digital Cameras, Audio and Video
We sell digital cameras, camcorders, audio and video electronics. Located in the heart of New York City, we are the store you’ve known for over 40 years. Shop online 24/7 or visit

SanDisk Introduces New Faster Memory Card For Digital Cameras, Video - All Headline News
Sydney, Australia (AHN) - SanDisk Corporation, the world leader in flash memory cards, has announced it will start shipping in August the fastest writing and reading memory card for digital cameras and video recorders. SanDisk unveiled Thursday at

CMOS sensor tailored for digital cameras - Electronic Engineering Times
Noting the shift toward from CCD to CMOS technology in the digital camera market, OmniVision Technologies is offering the OV5653, its latest 5Mpixel CMOS solution for digital-still and digital-video cameras. Based on the company’s latest 1.75

“Public Enemies” and the high-def look - Chicago Tribune
A coming-attractions trailer can give away so much. Yet even when the previews spill every narrative bean in sight, your eyes may well be deceived. What’s missing from these trailers? For better or worse, a sense of how the movie actually looks, and

Chicago ‘burb ditches red light cameras, no safety advantage - Ars Technica
There are many reasons for Chicagoans to poke fun at the northwest suburb of Schaumburg, but the existence of red light cameras soon won’t be one of them. Officials expect to get rid of Schaumburg’s sole red light camera in July after the local

EDITORIAL Military must be accountable - Bangkok Post
Imagine a pile of tightly packed 1,000-baht bills that is 1.5 kilometres high. Or imagine 1,000-baht banknotes spread carefully until they completely covered a tennis court and twice as high as you can reach. That is still less than the amount of

Report card on the footy broadcasters - Age
GIVEN the jockeying for position for the next AFL broadcasting contract (2012-17) has already started, it is difficult to believe the present deal has reached only the halfway mark. This is a good point to assess the performance of the three networks

With so many digital cameras on the market these days, choosing the right one to buy may seem like a daunting task. Chris Thomas provides a simple camera-buying guide to help you work out which camera type is going to be right for you and your budget!

There are really great advantages in digital photography:

You can shoot till you drop

Taking digital images on your camera has no implication other then you have captured the image. Then you can review each image on the small screen on the back of your camera. You can shoot as many pictures of the same scene as you like store them in memory delete the ones that you do not like and print the one(s) you like.

Each image is a winner

Alternatively you can put an image up on a computer screen or email it to all you friends can black mail be this easy?

Print at home or in a lab

You can print your image at home on a photo printer turn your image into a greeting card, calendar, or a whole other list of photo memorabilia. Or hand over the job to the professionals.

So what digital camera should I buy?

A question we are often asked is what sort of camera should I buy? There are literally hundreds of different models available from a large number of well known manufacturers.

This is a difficult question, which might be answered in a complex way. Rather, here we have tried to emphasise the salient points and assist you in your decision.

Key components of the camera, which will influence your buying decision will include:

What do I want to use the camera for? How big an image can I print? Does the camera have a zoom? What size and weight is the camera?

How big an image can I print?

If your objective is to take a camera on holiday, take it onto the beach and up a mountain and to print memorable images of your time on 6 x 4 inch prints, then do not spend a lot of money on your camera. A small compact camera with an image resolution of 2 or 3 Mega Pixels will be adequate for your needs and should you drop the camera or get sand in its workings then you will be pleased that you did not spend too much money.

More serious photographers will want to make bigger pints or selectively enlarge. They will want a higher image resolution and will benefit from a zoom lens.

So what is this MegaPixel thing? Well it is the image size quality taken by the camera. The higher the number the better the quality and the larger the prints which can be made.

Does the camera have a zoom?

In past times zoom lenses were regarded as second best because of their distortion and fogging. This is no longer the case zoom lenses are truly brilliant. 3 x zooms are common and 6 x zooms feature on the more expensive cameras. So you can have a single lens which covers both wide angle views and provides a short telephoto. All very usefully packaged in a lightweight camera.

Beware of Digital Zoom. This is a technique, which zooms in on a portion of the image by processing the picture and interpolating the image between pixels a technique which always produces inferior results.

What is the size and weight of the camera?

Digital cameras do not have to be bulky or heavy. Indeed there are some very small models available, which will fit inside a handbag. However the more sophisticated gear tends to be bulkier and heavier. Professional models with interchangeable lenses and external flash guns will require their own hold all.

Making the Right Selection

There is a fantastic range of digital cameras available on the market. Nonetheless manufacturers focus on their customers and target specific models at certain sectors of the market. The table below summarises the information, which we have discussed.

Basic camera

A fixed lens camera priced at less than 50 [Or $90 USD] which takes digital images of up to 1 MegaPixel - will be adequate for computer or television screen display.

Party Camera

A compact design camera with a fixed lens cost up to 150 [Or $280 USD] - taking images of up to 2 MegaPixel - will generate good quality images suitable for printing up to 4 x 5 inches

Holiday Camera

Another compact design but with a 2 1 zoom lens and costing between 200 and 400 [$350 - $800 USD] taking images or between 3 and 5 MegaPixel which will be suitable for printing up to 10 x 8 inches

Serious Camera

A SLR style camera with a 5 1 zoom lens costing between 600 and 1000 [$1000 - $2000 USD] and producing images of up to 6 MegaPixel which will produce prints of up to 12 x 16 inches

Professional Camera

An SLR camera with interchangeable lenses and costing upwards of 1,500  [Or around  $3000 USD], which will take images of up to 8 MegaPixel, which will print to poster size.

SLR stands for Single Lens Reflex. These are cameras, which do not have a separate viewfinder. Rather the operator looks through the lens of the camera. Momentarily before the shutter is opened a mirror flicks up and the light passing through the lens is allowed to hit the sensitive surface of the camera. In many cases the lens at the front of the camera can be changed for another type. A variation on this presents the image as seen by the camera in a digital liquid crystal display either on the back of the camera or through a viewfinder.

Flash. Many of the inexpensive cameras will have on board flash remember that these will only work up to about 10 feet, and they might produce red eye. More expensive cameras will expect the user to use an independent external flashgun.

Camera Accessories

Most digital cameras come with interface cables and PC software bundled. So if you have a PC at home or work you can download images from your camera to your PC, do basic editing such as removing red eye and delete the images you do not want! Your valued images you can store for future generations on CD Rom or another recording medium.

Digital Memory Media

Sometimes known as Smart Card, Compact Flash, Multi Media Card, Memory Stick. These are the memory chips on which your images are stored some people refer to them as digital film. The larger the capacity of the media, the more images it can store. So buy one larger then you need for now. Images can be deleted from the media but back them up on a CD Rom or DVD before you erase the card.

Final Hint Keep lots of batteries handy. Digital cameras use a lot of power!

ABOUT THE AUTHOR

No replies - Australian PC World
DAGAMES ELECTRONIC Ltd is a leading supplier of high-end products to customers with Registered No. 06748479, we deal primarily in genuine and brand new electronics, all items are sourced directly from the manufacturers and carry the manufacturer’s

Learn about digital cameras in senior center class - Redlands Daily Facts
Digital help: Mentone Senior Center will offer a digital camera/computer course from 10 a.m. to noon Wednesdays, beginning July 1. The class will help seniors and boomers learn about picture storage options, online photo sharing, e-mailing photos and

Just in time for summer: Magellan’s unveils new products - San Francisco Examiner
As summer slowly unleashes its hot temperatures on much of the country and people finalize plans for their vacations, Magellan’s has introduced several new products that will make traveling easier and more comfortable. The new Waterproof Camera Case

QQestore Launches “Personalised Photobook” Digital Album Service - BruDirect
Bandar Seri Begawan - The largest online shopping superstore in Brunei Darussalam, QQeStore.com, will be providing the latest novelty services to its current and new online customers the ‘Personalised Photobook’ service. Its aims are to bring to

Choosing a digital camera can be a daunting task with the wide number of choices available in todays market place. There are lots and lots of things that you need to keep in mind while going to choose a camera for yourself. The best digital camera for your friend might not be the best option for you.

So, the first question that you need to answer is that for what purpose you are planning to buy a digital camera. Is it to take photos of your family while on vacation or are you planning to become a photographer? This will help you to narrow down your choices to a limited few. So lets take a look at the options that we have :

A camera for emailing photos, taking family photos etc. : Most people use a digital camera for taking personal photos and then emailing them to family and friends. For this purpose, a simple and relatively cheap camera costing $100 to $200 and having a 2 mega pixel range is sufficient.

A camera for photographing images for online auctions : With more and more business taking place through the Internet, you might also need a camera to take photos of your antique furniture which you would like to sell. So, you need a camera which can take pictures at an extremely close range, say within 12 inches of the object. Thus, a camera consisting of 3-4 mega pixel is suitable for such purposes. The prices of these cameras are falling nowadays since they fall into mid-segment, i.e. they are neither hi-fi nor low end. So if you go and do a little bit of research, it is most likely that you will hit a good bargain.

A camera for images of top quality for web pages, desktop publishing etc : Now, if you need a camera for taking pictures for desktop publishing or web site development, then you need one with a 4-5 mega pixel range. These cameras normally have lots of additional features which you can use to enhance your images. Even though they are quite costly, they provide the best options with respect to resolution, features, and creativity. They also allow you create prints up to 8×10 inches in size with very good quality.

Besides the above points, you also need to consider other issues such as the ergonomics of the camera. How does it feel when you hold it in your hand ? Are you comfortable with its size and weight? Is it practical to carry it throughout the day ? Is its shape user friendly or does it look like a gizmo out of Star Wars?

If you emphasize on a light-weight and small camera, then you must also keep in mind the fact that you will compromising on the battery life. Most small cameras do not have powerful batteries since larger the battery, more the power. Also, small cameras have very small flash lights so the amount of flash generated by these pea-sized flashes will be considerably less than a bigger camera.

Hence, it is very important that you know exactly what you need your camera for in order to ensure that you are truly buying the best digital camera for yourself.

So, the first question that you need to answer is that for what purpose you are planning to buy a digital camera. Is it to take photos of your family while on vacation or are you planning to become a photographer? This will help you to narrow down your choices to a limited few. So lets take a look at the options that we have :

A camera for emailing photos, taking family photos etc. : Most people use a digital camera for taking personal photos and then emailing them to family and friends. For this purpose, a simple and relatively cheap camera costing $100 to $200 and having a 2 mega pixel range is sufficient.

A camera for photographing images for online auctions : With more and more business taking place through the Internet, you might also need a camera to take photos of your antique furniture which you would like to sell. So, you need a camera which can take pictures at an extremely close range, say within 12 inches of the object. Thus, a camera consisting of 3-4 mega pixel is suitable for such purposes. The prices of these cameras are falling nowadays since they fall into mid-segment, i.e. they are neither hi-fi nor low end. So if you go and do a little bit of research, it is most likely that you will hit a good bargain.

A camera for images of top quality for web pages, desktop publishing etc : Now, if you need a camera for taking pictures for desktop publishing or web site development, then you need one with a 4-5 mega pixel range. These cameras normally have lots of additional features which you can use to enhance your images. Even though they are quite costly, they provide the best options with respect to resolution, features, and creativity. They also allow you create prints up to 8×10 inches in size with very good quality.

Besides the above points, you also need to consider other issues such as the ergonomics of the camera. How does it feel when you hold it in your hand ? Are you comfortable with its size and weight? Is it practical to carry it throughout the day ? Is its shape user friendly or does it look like a gizmo out of Star Wars?

If you emphasize on a light-weight and small camera, then you must also keep in mind the fact that you will compromising on the battery life. Most small cameras do not have powerful batteries since larger the battery, more the power. Also, small cameras have very small flash lights so the amount of flash generated by these pea-sized flashes will be considerably less than a bigger camera.

Hence, it is very important that you know exactly what you need your camera for in order to ensure that you are truly buying the best digital camera for yourself.

ABOUT THE AUTHOR