31. The most familiar single sensor used for Image Acquisition is
A. Microdensitometer
B. Photodiode
C. CMOS
D. None of the Mentioned
Answer: B
The most familiar single sensor used for Image Acquisition is Photodiode. The photodiode is the most commonly used single sensor made up of silicon materials.
32. A geometry consisting of an in-line arrangement of sensors for image acquisition is _______
A. A photodiode
B. Sensor strips
C. Sensor arrays
D. CMOS
Answer: B
A geometry consisting of an in-line arrangement of sensors for image acquisition is Sensor strips.
Sensor strips are very common next to a single sensor and use an in-line arrangement.
33. CAT in imaging stands for
A. Computer-Aided Telegraphy
B. Computer-Aided Tomography
C. Computerised Axial Telegraphy
D. Computerised Axial Tomography
Answer: D
CAT in imaging stands for Computerised Axial Tomography. Industrial Computerised Axial Tomography is based on image acquisition using sensor strips.
34. The section of the real plane spanned by the coordinates of an image is called the __________
A. Spatial Domain
B. Coordinate Axes
C. Plane of Symmetry
D. None of the Mentioned
Answer: A
The section of the real plane spanned by the coordinates of an image is called the Spatial Domain, with the x and y coordinates referred to as Spacial coordinates.
35. The difference in intensity between the highest and the lowest intensity levels in an image is ___________
A. Noise
B. Saturation
C. Contrast
D. Brightness
Answer: C
Contrast is the measure of the difference in intensity between the highest and the lowest intensity levels in an image.
36. _____________ is the effect caused by the use of an insufficient number of intensity levels in smooth areas of a digital image.
A. Gaussian smooth
B. Contouring
C. False Contouring
D. Interpolation
Answer: C
False Contouring is the effect caused by the use of an insufficient number of intensity levels in smooth areas of a digital image. It is called so because the ridges resemble the contours of a map.
37. The process of using known data to estimate values at unknown locations is called
A. Acquisition
B. Interpolation
C. Pixelation
D. None of the Mentioned
Answer: B
Interpolation is the process used to estimate unknown locations. It is applied in all image resampling methods. In the Image processing field, image interpolation is a very important function for doing zooming, enhancement of images, resizing any many more.
38. Which of the following is NOT an application of Image Multiplication?
A. Shading Correction
B. Masking
C. Pixelation
D. Region of Interest operations
Answer: C
Pixelation is NOT an application of Image Multiplication. Because Pixelation deals with the enlargement of pixels.
39. The procedure done on a digital image to alter the values of its individual pixels is
A. Neighbourhood Operations
B. Image Registration
C. Geometric Spatial Transformation
D. Single Pixel Operation
Answer: D.
The procedure done on a digital image to alter the values of its individual pixels is Single Pixel Operation. It is expressed as a transformation function T, of the form s=T(z), where z is the intensity.
40. In Geometric Spatial Transformation, points whose locations are known precisely in input and reference images.
A. Tie points
B. Réseau points
C. Known points
D. Key-points
Answer: A
Tie points, also called Control points are points whose locations are known precisely in input and reference images.
