IMAGE COMPRESSION:

Introduction:
The image taken by the normal digital camera is 100megabites. This size is very big in case if you want to use these images in the website or even attaching through the email. By introducing the knowledge of image compression these things is very possible and easy.

By considering the knowledge given by Mr. Justine Ngimba and Zuwena Mgova on Monday 20th/April/2009 through their class presentation, at least most of us now know we have knowledge of image compression. Their presentation was very good and attractive since they were showing on how to compress the larger images to smaller images of different sizes.

The image compression is the process of reducing the size of the data files from large files to smaller files without losing the information. This image compression is very important in since it makes quick transferring of images through the network, also serves the space in the storage devices e.g. hard disk and movable storage devices and also it serves time in the process of image downloading and uploading.

There are different types of image formats depends on the intended use of the image. These image formats includes;

TIFF (Tagged Image File Format) JPEG (Joint Photographic Experts Group) GIF (Graphical Interchange Format) PNG (Portable network graphics) BMP (Bitmap). As IT professionals we have to be familiar with all these types of images so that we can work with any kind of images without facing any difficulties. Something we have to bear in mind is that image compression can only be done in the original image and not the compressed one and also do not save to the new format if you think you need to go on compressing image.

Image compression is very important but still there are some disturbances caused by this image compression. For example reducing the reliability of the image records as a result of losing some useful data, reduction of the information i.e. one can’t understand some of the contents. Also image compression result in destruction of image properties and during processing it takes a long time (time consuming).


Conclusion:By using image compression we can easily upload and download image files. Also it is possible to attach many images in the emails without facing any difficulties during uploading and downloading.