Home
>
Personal Technology
>
Image Conversion In Computers

Image Conversion In Computers

JPEG, GIFF/JIFF, BMP, and TIFF are the most commonly used formats for storing still image files such as photographs, graphics, and drawings. JPEG stands for Joint Photographic Experts Group and is a standard for image compression.

However, some amount of data/detail is lost in the process. JPEG therefore is characterized by a glossy compression technique for still color images, just as MPEG is used for compressing motion picture files.

GIFF/JIFF stands for Graphics Interchange format, which is a bit-mapped graphics file format.

Its storage is limited to about 256 colors as against 16 million colors in JPEG. GIFF therefore is more suitable to store illustrations rather than color photos.

Other popular formats for storing bit-mapped images are TIFF (Tagged image file format), BMP,and PCX. You'll also see GIF and JPG. You may be wondering what a bit-map is? A bit-map graphic is composed of a pattern of dots (each dot containing bits of data). Vector graphics, on the other hand, use geometrical formulas to represent images. The latter can be scaled i.e. the object size can be changed while maintaining its shape. Vector images are thus more flexible than bit-maps. Also vector imageslook better on higher resolution and require less memory. This brings us to the difference between Paint programs and Draw programs. In Paint program the drawings are represented as bit-maps. Draw programs, on the other hand, represent images as vector graphics.

Why we need to convert images from one format to another?

? Converting GIFF files to JPEG can compress the files to a considerable extent. The uncompressed data is normally 24 bits/pixel for full-color images. JPEG can achieve 10:1 to 20:1 compression without apparent loss, 30:1 to 50:1 compression with small to moderate defects, and 100:1 for very low quality purposes like archiving. These smaller size files increase storage capacity and take lesser transmission time across networks.

? JPEG files are extremely useful for image archiving purposes. JPEG files store a full color range (24 bits/pixel as against 8 bits/pixels in GIFF).The display of images is particularly good on full-color hardware that is becoming common now.

Conversion rules:

? Large, high-quality, real-world scanned photos are the best material for conversion to JPEG format.

? Do not convert black and white images to JPEG that works best with smooth and subtle color palette. B&W images are best on GIF.

? Even on colored images make sure to smoothen out the sharp edges before carrying out the conversion. A gray-scale image is much easier for a JPEG format.

? Avoid converting images that have already been converted before. Re-conversion spoils the quality of images. It's best to work with original scanned images here.

To explain how format conversion is carried out here's an example:

1. In a Windows operating system go to Start menu ? Accessories ? Paint

2. Create an image with the program and save it in BMP format. Now Close the file

3. To convert it into say JPEG, re-open the file

4. Go to File menu and click Save As

5. Rename the file in File name box and in Save as Type drop down box click on the format you want it to be converted to. In this case "JPEG File Interchange Format (*.jpg, *. jpeg,)"

6. Click on the Save button. Your file is now converted from BMP to JPEG.

If you want to change BMP to GIF, follow the same procedure except that in Save as Type box click on "Graphics Interchange Format (.gif)"

Once an image has been converted from one format to another, say GIF to JPEG, some of the information is lost. You can't go back to the original file. Therefore it is always advisable that you make a copy of the original file before converting it.

Krish is striving to offer best quality ebooks to the readers. He doesn't compromise anything with quality. He always wants that his readers should have maximum satisfaction on reading his eBooks.

KRISH is a writer and seller of high quality ebooks.

KRISH is selling High quality eBooks covering various topics.The ebook "Tame Your Personal Computer" explains in a simple language about Personal Computers. Please join our mailing list mailto:ananthcbe@hotmail.com http://www.ebook-retailers.com/tame/

In The News:

An artificial intelligence-powered home security system can fire paintballs and tear gas at trespassers. The camera identifies human faces and animals.

Technology expert Kim Komando gives her tips and tricks on enhancing your user experience a smartphone and other devices you use everyday.

A new camera called NUCA uses artificial intelligence to create deepfake photos of subjects by stripping away clothing in close to real time.

The Kimberley Kube trail-ready camper has a compact but spacious design and combines luxury, functionality and ruggedness for a weekend getaway.

Stay up to date on the latest AI technology advancements and learn about the challenges and opportunities AI presents now and for the future.

Emails instructing you to reset your password for an account may be legitimate, or they may be scams. Kurt "CyberGuy" Knutsson explains.

Northrop Grumman's Manta Ray uncrewed underwater vehicle aims to revolutionize undersea missions — it glides through the ocean without human assistance.

Learn how to work Google's calendar application to streamline and organize your daily tasks from technology expert Kim Komando.

If you do not want Facebook to have automatic access to your private photos, follow our tips to protect yourself. Kurt “CyberGuy" Knutsson shows you how.

Kurt “CyberGuy" Knutsson goes into detail about Apple’s recent iOS update that allows iPhone users to instantly translate spoken language simply by using the Action Button.

Safeguarding your digital life with a reliable physical backup isn't just a precaution, it's a necessity. Kurt “CyberGuy" Knutsson provides the essential backup checklist.

Kurt “CyberGuy" Knutsson reveals how a Redditor exposed false recycling claims at their apartment, highlighting a report that only 21% of U.S. recyclables are processed.

Kurt "CyberGuy" Knutsson offers a travel toolkit featuring five technology tools to help you with booking flights and hotels for your summer vacation.

The bubble behind the clock on your iPhone can appear in different colors. Kurt "CyberGuy" Knutsson explains what each of those colors mean.

Scammers are using the power of artificial intelligence to mimic voices of people and are using the fake voices to commit crimes, like kidnappings.

Stay up to date on the latest AI technology advancements and learn about the challenges and opportunities AI presents now and for the future.

Tech guru Kurt "CyberGuy" Knutsson explains the science behind the Invisibility Shield, a 6-foot shield that makes people become invisible.

The International Olympic Committee on Friday announced plans to use AI in various Olympic aspects, including athlete identification, training and judging.

Tech guru Kurt "CyberGuy" Knutsson explains an easy trick to avoid squinting while working or surfing the web by zooming in on your personal computer.

Streaming giant Roku has recently been targeted by a pair of cyberattacks, and the company confirmed over a half million Roku accounts were compromised.

The Land Aircraft Carrier combines an all-terrain, six-wheeled vehicle with a two-seat aircraft, which features electric vertical takeoff and landing.

The European Union has sent TikTok a "request for information" on the video sharing platform's newest app, TikTok Lite, under the Digital Services Act, with the aim to clean up social media.

Stay up to date on the latest AI technology advancements and learn about the challenges and opportunities AI presents now and for the future.

The FBI is warning the public about a recent phishing scam via text that claims its targets owe money in Pennsylvania for unpaid road toll charges.

Your Apple Music settings may be revealing to your contacts what you're listening to. Kurt "CyberGuy" Knutsson explains the process to change those settings.

Image Conversion In Computers

Personal Technology