Digital Imaging Processing

Question 0

Deals with an image which is composed of many image points

Answer 0

Digital Image Processing

Question 1

Technology of applying a number of computer algorithms to process digital images

Answer 1

Digital image processing

Question 2

Main purpose of processing

Answer 2

Allow to obtain an imahe of high quality or descriptive characteristics of the original image

Question 3

Generated from continuous function, required for human viewing

Answer 3

Analog images

Question 4

Numerical representation of the patient

Answer 4

Digital image

Question 5

Related to brightness or color

Answer 5

Pixel value

Question 6

Two domains

Answer 6

Spatial location

Spatial frequency

Question 7

An image is described using right handed x-y coordinates

Answer 7

Spatial location domain

Question 8

Images are acquired and described according to tge wavelength of the signal

Answer 8

Spatial frequency domain

Question 9

Digitizing an image

Answer 9

Scanning
Sampling
Quantization

Question 10

Image is divided into array of pixels

Answer 10

Scanning

Question 11

Brightness level of each pixel is measured by PMT

Answer 11

Sampling

Question 12

Process where the brightness levels obtained through sampling are assigned

Answer 12

Quantization

Question 13

Integer

Answer 13

Gray level

Question 14

Total number of gray level

Answer 14

Gray scale

Question 15

Quantization occurs in

Answer 15

Analog digital converter

Question 16

Divides the analog signal into equal parts depending on its bit capacity

Answer 16

Analog digital converter

Question 17

Generate image that is more pleasing to the observer

Answer 17

Image enhancement

Question 18

To improve the quality of images ggat have distortion or degradations

Answer 18

Image restoration

Question 19

Allows measurements and statistics to be perform

Answer 19

Image analysis

Question 20

To reduce the size of the image in order

Answer 20

Image compression

Question 21

2 types of compression

Answer 21

Lossy

Lossless

Question 22

Some loss image when decompressed

Answer 22

Lossy

Question 23

No loss of information when decompressed

Answer 23

Lossless

Question 24

Creates images from other images pr non images data

Answer 24

Image synthesis

Question 25

Concepts of dogital imaging processing

Answer 25

Point processing operation Local processing operation Global processing operation Geometric operation

Question 26

Most frequent and simple used operation in digital diagnostic imaging

Answer 26

Point processing operation

Question 27

3 methods of point processing

Answer 27

Histogram Look up table Windowing

Question 28

Graph of number of pixels in the entire image

Answer 28

Histogram

Question 29

Determines the number assigned to input pixel values

Answer 29

Look up table

Question 30

Range of numbers, controls image contrast

Answer 30

Window width

Question 31

Center of the range, controls brightness of tge image

Answer 31

Window level

Question 32

Uses window width and window level

Answer 32

Windowing

Question 33

The output image pixel value is obtained from a small area of pixels. It makes use of the image domains

Answer 33

Local processing operation

Question 34

Value depends on a group of pixel in the input image

Answer 34

Spatial location filtering - convolution

Question 35

Known as edge enhancement Image in spatial location is converted to be in the spatial frequency

Answer 35

Spatial frequency high pass filtering

Question 36

Output image will be blurred Makes use of a low filter to operate on the input image with the goal

Answer 36

Spatial frequency low pass filtering

Question 37

Intended to reduce noise and displayed brightness levels of pixel

Answer 37

Smoothing

Question 38

Makes use of a blurred image produces from the low pass filtering process and subtracts it from the original to produce sharp

Answer 38

Spatial frequency processing : unsharp masking

Question 39

Pixels are used to change the value of a pixel in the output image

Answer 39

Global processing operation

Question 40

Allows user to change the position of pixel rather than brightness of tge pixels

Answer 40

Geometric operation

Question 41

Range of technique that allows the user to change the appearance of a digital image

Answer 41

Image post processing