Image Extensions

1.Jpeg:




    Joint photographic experts group, it is the most famous image Extension used for web.jpeg. these are very lossy, it looses alot of information and also effects the quality of image because is makes it small. Almost every digital camera can shoot and save in JPEG format. It is very friendly because it's smaller takes less room and requires less time to upload to a site. Moreover it's less grainy then GIF, the old Kong of the internet roost. Since 1994 JPEG is considered as the standard.






Pros of JPEG:




    Graphics Interchange format,
• 24 color bit, with up to 16 million colors.
• Rich colors, great for photographs that need fine attention to color details.
• Most used and most widely accepted format.
• Compatible in most OS ( Mac, Linux, PC)


Cons of JPEG:



• they tend to discard alot of data.
• after compression, tend to create artifacts.
• cannot be animanted.
• doesn't support transparency




2 GIF:




   Graphics Interchange format, it allows 8 bit palette with only 256 colors, it's still a popular image on the internet because image size is relatively small compared to other images compression types.
 gIF compresses image in two ways,. Firstly, by reduction of colors in Rich colors images, thus the number of bits per pixel. Secondly, GIF replaces multiple occurring  patterns into one. GIF os most suitable for graphics, diagrams, cartoons, logos with relatively few colors, GIF is still the choosen animated image effect compared to JPEG it is lossless and thus more effective woth compression of single color.


Pros of GIF:

• can support transparency
•  can do small animation effects.
• great for images with limited colors, or flat regions of colors.
• lossless quality of image they contain the same quality of image.



Cons of GiF:

•Only support 256 colors
• it's the oldest format in the web, having existed in 1989, it hasn't updated since, sometimes it's larger then PNG.


3. BMP:


 The windows bitmap, are image files within the Microsoft windows operating system. these files are large and uncompressed, but the images are rich in colors, high in quality, simple and compatible in all windows OS and programs. BMP are also called raster or paint images.BMP files are not great and not very popular. being oversized. bitmap files are not what you call web friendly nor they are compatible in all platforms and they don not scale well.


Pros of  BMP:


works well with most windows programs and OS, you can use it as a windows wallpaper.


Cons of BMP:


Does not scale or compress well.
Again, very huge files making it not web friendly
No real advantage over other image formats.


4.TIFF:


TIFF was created by Aldus for  desktop publishsing and by 2009 it was transferred to the control of adobe systems. TIFF is popular among common users, but has gained recognition in the graphics design, publishsing and photography industry. it is also popular among Apple users. it is capable of recording halftone image data with different pixel intensities, thus is the perfect format for graphic storafe, processing and printing. this makes the TIFF the superior rester image format.


Pros of TIFF:


Very flexible format, it supports several types of compression like JPEG, LZW, ZIP or no compression at all.
High quality image format, all color and data information are stored.
Tiff format can now be saved with layers.


Cons of TIFF:


Very large file size long transfer time huge disk space consumption and slow loading time.


5. PNG:


portable network graphics is a recently introduced format, so not everyone is familiar with it, but PNG has been approved as a standard since 1996. it is an image format specially designed for the web. PNG is in all aspects the superior version of the GIF. just like the GIF format, the PNG is saved wwith 256 colors maximum but it saves the color information more efficiently. it also supports an 8 bit transparency.




Pros of PNG:


Lossless, so it does not lose quality and detail after image compression.
In a lot ways better then GIF. to start, PNG often creates smaller file sizes than GIF
Supports transparency better than GIF.


Cons of PNG:

Not good for large images because they tend to generate a very large file, sometimes creating larger files than JPEG.
Unlike GIF however, it cannot be animated.
Not all web browsers can support PNG.









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