Author Topic: Know the Differences Between File Types BMP/GIF/JPEG/TIFF  (Read 1551 times)

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Offline Zahida Raees Raji

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Know the Differences Between File Types BMP/GIF/JPEG/TIFF
« on: August 16, 2008, 03:10:13 PM »
Know the Differences Between File Types

When working with image files, the key thing to keep in mind is that there is not just a single type of image file, there are many! Each type of image has their own benefits and downfalls which must be looked at so that you may use the correct type for your project. Using the wrong image type could wreck all your work, take up too much disk space or even not show up at all when you display it.


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JPEG


JPEG images are the most common image type that you will come across in your travels around the web. JPEG stands for "Joint Photographic Experts Group". What this means is the specific way that the image is compressed has been approved by the photograp hics expert group to be the best format for an internet-displayed photographic image. There are reasons why you should use JPEG compression and reasons not to, such as:


Benefits

Small image size
Viewable from the internet
Uses millions of colours
Perfect for most images
Downfalls
High compression loses quality
Every time a JPEG is saved, it loses more and more of the picture

The image above is small, needs to be viewed over the internet, and has a lot of detail and color in it, meaning that JPEG compression suits it best.


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GIF


GIF images are truly the internet standard for any type of small, simple file. GIF stands for Graphics Interchange Format. The most common use for a GIF is for menu buttons or icons for a webpage. The reason being that GIFs are extremely tiny in file s ize and have no complex colors, so they load almost instantly on any webpage. Also, any other file which is made up of only use a few basic, flat colors will want to use GIF compression.


Benefits

Supported by all web browsers
Very small file size
Quick to load
Useful for Transparencies, Animations or Image Maps

Downfalls
Only basic colors can be used
Makes complex pictures look horrible
No detail allowed in images



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BMP - Bitmap

Bitmap files (signified by .BMP extension) are the standard in basic image editing. Bitmaps are exactly as the name says, a map containing many bits of an image. The image displayed above is what a bitmap file would look like very close up. As you can see, it is just a large array of bits of an image, that when put together, looks like a picture. Since scanners and digital cameras take pictures in this same way (by capturing an group of pixels) most image editing programs will use BMP files for a true 1:1 copy of the file.

Benefits

High image quality
Easy to edit and change
No image loss through process

Downfalls
Not usually displayable on internet
Large file size

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TIFF
A TIFF file is the industry standard in perfect image editing. Not only is every single color captured to perfection, but it also has zero compression for lossless editing. TIFFs are the default image type when you are using a professional editing package, such as Adobe's Photoshop. The best place to use a TIFF would be when using the scanners to get a large, detailed image with no loss in quality. The only problem is that TIFF fi les take up so much room on a disk that they're impossible to put onto a floppy disk, impossible to use on the internet and forget about trying to email one. Not going to happen.

Benefits
Perfect Image
You know exactly what the image will look like when you're done
Never any image loss

Downfalls
 Massive file size prohibits any transferring of the file
Not viewable on the internet
Only specialized programs can view it


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So now that you know which file types are good for which purposes, image editing and web page creation will be much easier for you. Good luck!

http://www2.cs.uregina.ca/~cs100/useful_links/imagetypes.html
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Offline ar_baloch

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Re: Know the Differences Between File Types BMP/GIF/JPEG/TIFF
« Reply #1 on: February 09, 2010, 11:04:10 PM »
thanks a lot   (F)
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