Digital Camera Guide  
Home » Digicam advanced

Digicam articles

» Digicam features

» Digicam basics

» Digicam advanced

» Using your digicam

» Digicam care

Camcorder articles

» Camcorder basics

» Video storage

» Using your camcorder

» Digicams & computers

» Video editing

» Distribute your movies


» Contact us
» Privacy policy
» Free website content
» Partner sites

Barrel distortion

By Jakob Jelling

The digital camera is a technologically advanced and ever proceeding device. And with such intricate designed technology comes in some unwanted problems too. A lot of problem is however eliminated my careful scrutiny but in order to do so the users of the digital camera must be well aware of the problems themselves. In this discussion an effort is made enquire and find one such problem and at the same time seek suitable methods of dealing with them. The problem is of barrel distortion in the digital camera, a problem that just cannot be overlooked. Basically the barrel distortion is where horizontal and vertical lines bend outwards toward the edge. And here comes in this discussion!

There are various methods in which an image distortion caused, like for example by projecting onto a convex surface. Consequently the single-axis barrel distortion occurs when projecting on the outside of a cylinder. The distortion can be assuaged with the intelligent use of optical elements, electronic devices or software to counter-distort the picture in the image. It must be noted here that the opposite of barrel distortion is called pin cushioning. By definition barrel distortion is allied with wide angle or minimal zoom lenses and as a result it causes the images to appear spherical or somewhat curved outward. Most digital cameras suffer from this type of distortions especially if it contains a zoom lens. Many professionals mostly because of their unacceptable lens distortions have criticized the consumer digital cameras for this effect.

Next it is time to enquire into the various ways of correcting the problem of barrel distortion in digital cameras. The software named "PhotoBrush" can correct these distortions. It is said that this software has high quality bi-cubic interpolation and as a result the images become both clean and sharp and even get free from any traces that the image was maneuvered. This professional quality function is something that very petite software packages can produce. Further looking into the matter it can be stated that, as per reliable sources, for barrel distortion most digital cameras need be in the range of 10 to 20 promille. A very important note is that barrel distortion correction must be done before any crop or size changes. The reality must be that the barrel correction process should be the very first step on the full image. If the images are cropped and then use barrel correction is done then the effect would be obviously wrong. And the barrel distortion would not get efficiently removed.

Again, a very impressing and good news for the users of digital cameras is that upon most images or photographs of the digital camera the use of the barrel correction is enough, however in some shots it might be necessary to use a method called "perspective correction" to make all the angles 90 degrees. But this is not required in majority of the cases, and may be required for very very specialized and professional photographs.

With the above lines disclosing most of the unknown fact regarding the digital camera barrel distortion in front of the users and novices as well as the new purchasers of the digital camera, it can be expected that the problem would get removed very soon with more and more people becoming aware of it and thereby all its vulnerabilities being exposed. Thus the digital camera would get it true honor.

Latest digicam/camcorder articles

» The advantages of distributing your movies on DVD
Distributing your movies on DVD is one of the first choice people make due to several reasons.

» Some aspects to consider regarding a MPEG movie
MPEG files can contain video as well as audio and there are different compression methods which can be used with it.

» Add cool transitions while editing your video
Adding cool transitions to a video can make a huge difference in the way it will look once is ready.

» Learn how a timeline works
A timeline is the central mechanism on which non linear video edition is based and through which such type of editions are done.

» How to capture video
Capturing video from a camcorder or from a TV into a PC is not a very complicated task once you know which steps to follow and have the proper devices.

» Firewire is your friend
FireWire is an external device used to transfer high amounts of data. This device was invented by Apple and is also known as the IEEE 1394 since it is the standard to which it belongs.

» What is color balance all about?
The colors we see depend on the environmental light that surrounds us at every given moment.

» How can exposure affect your videos?
Exposure is an effect caused by an important variation of the light amount which passes through a camcorder's lens.

» How about sound?
Sound is one of the aspects which might have the greatest impact in a video, although sometimes it is a factor to which we do not pay much attention while recording.

» What is a MD disk?
MD stands for Mini Disk, and as it name suggests it is a disk of very small size. A Mini Disk or MD has a height of 6.75 cm, a width of 7 cm and a depth of 0.5 cm.

» Mini DV tape pros
Mini DV tape is one of the video storage formats most successful among all consumers, from professionals to amateurs, who realize of the important pros this format has.

» Learn what viewfinders and LCD monitors are
Viewfinders and LCD monitors are different things although they have some points in common.

» Some aspects to consider regarding DV software
There are so many different DV software types and pieces that might turn the activity of choosing one into a very complicated thing to do.

» Some tips on how to find the right camcorder
There are several things to consider at the time of choosing which camcorder to buy and which one best suits your needs.

» Binocular digital camera
In the modern world of digital cameras, technology is taking a new turn every other day. Such an advancement is the coming of age of digital cameras into the world of digital binocular cameras.

» Video clip recording feature in digital cameras
The video clip recording feature of the digital cameras is that one giant leap for mankind in lieu of than small step of aspiration.

» Digital camera connectivity explained in intricacy
In a complicated and intricate subject matter such as the digital camera, the importance lies in the fact that a lot remains to be explored in order to understand the device in a greater understanding and make it more and more popular among the users as well as the photographers. Such a topic is camera connectivity.

» Chromatic aberrations explained
Looking at the details of the digital camera features a topic that can be prominently in the front lines is that of the concept of digital camera chromatic aberrations.

» Digital camera pincushion distortion facts
Looking at the fantastic device that we know as the digital camera some really important facts regarding the problems this device might possess comes into view. Such a case is that of the digital camera pincushion distortion.

» Cell phone cameras
A lot of myths exist regarding as to whether the cell phone cameras are any good or not.

» Take advantage of natural lightning
One very important concept regarding the digital camera use is that of the concept of lighting.

» How to light up the background
It is fact that a person using a digital camera must be rationally aware of the details of the lighting that is necessary as well as required.

» Digital cameras gamma settings explained
When viewing or capturing images on the digital camera the idea of outputting them to a printer or other output device should be ensured with the perfection of gamma settings of adjusted correctly.

» The trick of infrared photography
It is a fact that digital cameras have revolutionized the world of photography. And infrared digital photography is just one more feather in the hat of this fantastic technologically advanced device.