30-07-2009, 05:09 PM
An image defined in the real world is considered to be a function of two real variables say x,y.
Before going to processing an image, it is converted into a digital form. Digitization includes sampling of image and quantization of sampled values.
After converting the image into bit information, processing is performed.
This processing technique may be,
Image enhancement
Image reconstruction
Image compression
Image enhancement refers to accentuation, or sharpening, of image features such as boundaries.
Image restoration is concerned with filtering the observed image to minimize the effect of degradations.
Image compression is concerned with minimizing the no of bits required to represent an image.
Text compression “ CCITT GROUP3 & GROUP4
Still image compression “ JPEG
Video image compression -MPEG
http://pptpdf.net/subcategory.php?categ=...NIQUES.pdf
