3-1

Question 1

DIP ?

Answer 1

Digital Image Processing

Question 2

what is DIP

Answer 2

using computer algorithms, to get enhanced image/ extract some useful information

Question 3

what method is image processing

Answer 3

method to perform some operations on an image

Question 4

purpose of DIP (2)

Answer 4

• Improves visual appearance of images to viewer
• Prepares/processes images for measurements/analysis of features & structures present

Question 5

types of operations (3)

Answer 5

• point
• local/neighbourhood
• global

Question 6

point operation complexity and info

Answer 6

constant complexity

pixel value of the output image depends only on the pixel value of the same pixel

Question 7

point operation examples (3)

Answer 7

• histogram equalization,
• contrast stretching,
• segmentation based on pixel value

Question 8

Neighbourhood/Local operation complexity and info

Answer 8

P^2 complexity

the pixel value depends on the pixel values in the neighbourhood of the same pixel

Question 9

Neighbourhood/Local operation examples (2)

Answer 9

• convolution (as for image smoothing or sharpening)
• spatial feature detection (e.g., line, edge, and corner detection)

Question 10

Global Operation complexity and info

Answer 10

N^2 complexity

the pixel value depends on the pixel values of all pixels

Question 11

Global Operation examples (5)

Answer 11

image transformations,
(Fourier, Hartley, Hough,
Haar, Radon transforms)

Question 12

g(x,y) = t(f(x,y))

Answer 12

do u remember the formula