Digital Image Processing

Image – a two-dimensional function f(x,y).

Where, x and y = Spatial (plane) coordinates



Image is a 2-D array specifically arranged in rows and columns. Color image- It has 24 bit color depth = 8 x 8 x 8 bits = 256 x 256 x 256 colors = ~16 million colors







Grayscale image - In a (8-bit) grayscale image each picture element has an assigned intensity that ranges from 0 to 255. A grey scale image is not a black and white image, but includes many shades of grey.







Gray level of image- Amplitude of f at any pair of coordinates (x,y) .

Digital image - When x, y and the amplitude values of f are all finite, discrete quantities. Digital image is composed of a finite number of elements, each of which has a particular location and value.

Pixel- the element of a digital image.









Field of digital image processing - Processing digital images by means of a digital computer Humans are limited to the visual band of the electromag…