Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
What is digital image processing?
|
Processing that involves multidiscipline physics, mathematics, engineering and computer science.
|
|
What are analog images?
|
Analog images are contiuous because they represent a continuous distribution of light / electric intensity.
|
|
What are digital images?
|
Digital images are numeric representations of objects.
|
|
If both the input and output images are discrete, what is that referred to as?
|
Digital processing
|
|
What are the 3 steps of digitization? And what is involved with each step?
|
1. Scanning - division of picture into small regions (grid)
2. Sampling - measures the brightness of each pixel 3. quantization - asigning an integer or grey level |
|
What are the 2 most inportant characteristics of ADC?
|
1. speed - the time taken to digitize the analog signal. Inversely realted to accuracy
2. accuracy - the more samples taken the more accurate the representation of the digitial image will be. |
|
What is the major goal of digitizing images?
|
The images can be processed by a computer, resulting in numerous advantages: Image enhancement, restoration, analysis, detection.
|
|
What are the 3 types of image processing techniques?
|
1. point operations - pixel by pixel scanning for contrast enhancement. The most frequently used, "grey level mapping"
2. local operations - localized pixel scanning of multiple pixels. Ex. spatial frequency filtering` 3. global operations -entire input pixels used for edge enhancement, image sharpening, image restoration |
|
What are Geometric Operations?
|
Geometric operations are intended to modify spatial position or orientation of the pixels. Used for scaling and sizing of the image, image rotation and translation
|
|
What hardware is used for image processing?
|
Digitizer, Image memory, DAC, Internal image processor.
|