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The identification technique using voice, keystroke, gait etc. are included
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in image enhancement (2) behavioral biometrics (3) face recognition
(1) image enhancement (2) behavioral biometrics (3) face recognition
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Which of the following steps are included in iris segmentation?
(1) Image acquisition (2) iris normalization (3) iris localization
. _____ is an image acquisition technique
(1) Sobel (2) Kirsch (3) UBIRIS
Localization of iris, pupil, eyelids come under
(1) normalization (2) segmentation (3)extraction
Verification using genetic algorithm and back propagation is done in
(1) iris recognition (2) face detection(3) fingerprint identification
The keyboards of a personal computer, the scanner of a bar-code reading
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system and the switches or buttons of a microwave oven are examples of
________________.
(1) Output devices. (2) Input devices.(3) Input/output devices.
. Which of the following method is used to represent still images when
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there is blocked – color drawings consisting of regular shapes in the
image?
(1) Raster graphics. (2) Vector graphics. (3) Raster images.
There is a compression technique that can be used for sound files. It is
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known as ________.
(1) MPEG (2) MP3 (3) GIF.
In a computer, bitmaps and vector graphics are two basic methods of
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representing _________.
(1) Still images. (2) Moving images.(3) Texts
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The binary code for the hexadecimal code: A2B is _______________
(1) 1011 0010 1010 (2) 1100 0001 1110(3) 1010 0010 1011
Special-purpose processors can be subdivided into many different groups
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which are________
(1) Micro controllers (2) digital signal processors (DSPs) (3) All of the
above
In a flash analog-to-digital converter, the output of each comparator is
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connected to an input of a ________.
(1) decoder (2) priority encoder (3)multiplexer
Which term applies to the maintaining of a given signal level until the next
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sampling?
(1) Holding (2) Aliasing (3) Shannon frequency sampling
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An op-amp has very ________.
(1) low output impedance (2) high input impedance (3) all of the above
For a 4-bit DAC, the least significant bit (LSB) is ________.
(1) 6.25% of full scale (2) 12% of full scale (3) 0.625% of full scale
The dual-slope analog-to-digital converter finds extensive use in
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________.
(1) function generators (2) frequency counters (3) all of the above
The ADC0804 is an example of a ________.
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(1) successive-approximation analog-to-digital converter (2) digital-ramp
analog-to-digital converter (3) dual-slope analog-to-digital converter
In a digital representation of voltages using an 8-bit binary code, how
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many values can be defined?
(1) 16 (2) 128 (3) 256
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A 4-bit R/2R ladder digital-to-analog converter uses ________.
(1) one resistor value (2) two resistor values (3) three resistor values
A binary-weighted-input digital-to-analog converter has a feedback
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resistor, Rf, of 12 k. If 50 A of current is through the resistor, voltage out
of the circuit is ________.
(1) 0.6 V (2) –0.6 V (3) 0.1 V
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The resolution of a 6-bit DAC is ________.
(1) 1.59% (2) 63% (3) 64%
Which type of ADC quantizes the analog signal into a stream of bits whose
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amount corresponds to the signal level?
(1) Successive approximation (2)Sigma-delta (3) Dual-slope
A binary-weighted-input digital-to-analog converter has an input resistor
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of 100 k. If the resistor is connected to a 5 V source, current through the
resistor is ________.
(1) 50 mA (2) 50 A (3) 5 mA
In troubleshooting a DAC, we check its performance characteristics, such
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as ________.
(1) nonmonotonicity (2) ow and high gain (3) all of the above
In a digital reproduction of an analog curve, accuracy can be increased by
________.
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(1) sampling the curve more often (2)sampling the curve less
often (3)decreasing the number of bits used to represent each sampled
value
1) What is image segmentation how will you detect discontinuities
35) Explain different thresholding techniques
36) Write a note on water shed segentation algorithm.
37) Explain Hough transformation.
38) Breif the spatial techniques in image segmentation
39) Explain the concept of threshold in image segmentation
40) How will you perform segmentation by morphological watersheds..
41) What is the regiol based segmentation and thresholding