Fundamentals of Image Processing

Slide 1

Fundamentals ofDigital Image ProcessingMohd. Naushad IdrisiPresented by1. What is Digital Image Processing?One Picture is Worth More Than Ten Thousand Words

1. What is Digital Image Processing?Application Area:Improvement of Pictorial Information for Human Interpretation

Processing of Image Data for Storage, Transmission and Representation for Autonomous Machine Perception

1. What is Digital Image Processing?An Image:

DiscretizationQuantizationg(x , y)g(i , j)f(i , j) Digital Imagef(i0 , j0) : Picture Element, Image Element, Pel, Pixel

1. What is Digital Image Processing?DIP Definition:A Discipline in Which Both the Input and Output of a Process are Images. Process

ImageImage2. Fundamental Steps in Digital Image Processing

Fig.: Fundamental Stepsin Digital ImageProcessing2. Fundamental Steps in Digital Image Processing1. Image acquisition: To acquire a digital image

2. Fundamental Steps in Digital Image Processing2. Image pre-processing: To improve the image in ways that increase the chances for success of the other processes.

Fig.:Processing theImage to Enhance the Image Contrast3. Image segmentation: To partitions an input image into its constituent parts or objects.2. Fundamental Steps in Digital Image Processing

Fig.:Segmenting the image into 3 partsTiger 1Tiger 2Greenery4. Image representation: To convert the input data to a form suitable for computer processing.

2. Fundamental Steps in Digital Image Processing

Fig.:Every pixel of 8-bit image is represented by a grey scale leveli.e. between 0 to 255 5. Image description: To extract features that result in some quantitative information of interest or features that are basic for differentiating one class of objects from another.

6. Image recognition: To assign a label to an object based on the information provided by its descriptors.

2. Fundamental Steps in Digital Image Processing7. Image interpretation: To assign meaning to an ensemble of recognized objects.

Knowledge Database:Knowledge about a problem domain is coded into an image processing system in the form of a knowledge database.

2. Fundamental Steps in Digital Image Processing

5. Components of an Image Proc. SystemThe basic operations performed in a digital image processing systems include:

Acquisition (e.g. Camera)Storage (e.g. Optical Disks)Processing (e.g. Computer)Display (e.g. TV Monitor)Communication Channel3. Components of an Image Proc. System