Description: The course "Digital Image Processing" (third edition), He Dongjian editor.
The first chapter structure:
1.1 Digital Image Processing and Characteristics
Image is important information
1.1.1 Digital Image Processing and Image
classification:
The storage forms and manifestations, analog images into digital images and image.
the difference:
Simulation image, the image information is continuously stored and manifestations; computer processing the digital image only.
relationship:
Analog image -> apparatus for processing a digitized -> Digital Image
He says:
Digital image used to represent two-dimensional matrix, a digital image of M × N pixels, the pixel grayscale values can be M rows, columns of matrix G N represents; convention: x is positive to the right axis, the y axis is positive
deal with:
After image digitization, the replacement will be able to perform basic operations, such as addition and subtraction, and basic digital image processing which is essentially a combination of these simple operations.
1.1.2 Characteristics of Digital Image Processing
slightly
1.2 purpose of image processing and the main content
1.2.1 purpose digital image processing
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The main contents 1.2.2 Digital Image Processing
Acquisition -> Processing -> Output
1.3 Application of digital image processing
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Developments 1.4 Digital Image Processing
slightly
Test sites:
1.1
1. What is a digital image
1. Digital image definition:
a. a two-dimensional image by a finite number of discrete points denoted
. B basic unit: discrete points -> picture elements -> pixels
2. The digital representation of the image:
A digital image of size M × N matrix representation, G = [g11, g12, ...]
In a.gij, (i, j) represents a pixel location; values of gij, represents a pixel value (pixel luminance / grayscale / color). They are rounded.
bM, N represents the resolution of the digital image
II. What is Digital Image Processing
1.1 Definitions
Process a. By computer digital image processing and processing
. B comprising: image enhancement, partition, extraction, recovery, geometric conversion, compression, coding theory, methods and techniques
. C essential characteristics of digital image processing: Image -> Image
The main contents of digital image processing 1.2:
1. Image acquisition and characterization, comprising: an image pickup, a photoelectric conversion, digitalization
2. Image Enhancement
Action a. Improve the visual quality of the image, to improve the visual effectiveness b. Prominent feature of interest in the image, and a computer to facilitate detection of the human eye
3. Image segmentation
Action: dividing the image into several areas, dividing the target process object
The image of the geometric transformation
Action: change the image size, the position, shape and other geometric characteristics
The image compression coding
Action: the premise of ensuring the image quality, reducing the amount of image data
6. The feature extraction
Related disciplines with 1.3 Digital Image Processing
1.4 Applications of Digital Image Processing
1.5
A hardware part
1. The image input device: digital image acquisition and
2. The image processing computer: pc / graphic image workstation
The image output apparatus: a graphical representation of
II. Digital image processing system software
1. Application software: photoshop
2. The development of image processing applications: VC ++, Matlab