Interactive Quiz (See related pages) 1 The transform which posseses the ‘multi-resolution’ property is A) Fourier transform B) short-time Fourier transform C) cosine transform D) wavelet transform 2 The transform which is widely used to detect ‘lines’ in an image is A) Fourier tranform B) Hough transform C) cosine transform D) Haar transform 3 The transform which posseses the highest ‘energy compaction’ property is A) Fourier transform B) Walsh transform C) slant transform D) KL transform 4 Which one of the following is a lossy coding? A) Run-length coding B) Uniform quantiser C) Huffman coding D) Predictive coding without quantiser 5 In a DPCM coder, which of the following needs to be quantised? A) The reconstruction value B) The difference between prediction value and the original value C) The prediction value D) The transform coefficient 6 The transform coefficient A) The lower bound to encode a source without distortion B) The upper bound to encode a source without distortion C) The average number of bits to encode a source without distortion D) The average number of bits to encode a source given a certain distortion 7 In an image compression system, 16384 bits are used to represent a 128×128 image with 256 gray levels. What is the compression ratio for this system? A) 4 B) 8 C) 12 D) 16 8 The transform used in JPEG image compression is A) discrete cosine transform B) Walsh transform C) Hadamard transform D) KL transform 9 The number of bits necessary to represent a 256 × 256 image with 256 gray level is A) 524288 B) 324288 C) 224288 D) 124288 10 Comparing geometrical zonal coding with threshold coding, for the same number of transmitted samples, which of the following is not correct? A) Threshold coding has more distortions. B) Threshold coding mask gives a better choice of transmission samples. C) Threshold coding needs more rates. D) In threshold coding, the addresses of the transmitted samples have to be coded for every image block. 11 The wiener filter behaves like an inverse filter A) in the presence of noise B) in the absence of noise C) in the presence of noise and degradation D) Wiener filter will not resemble inverse filter under any condition 12 The logarithm of a Fourier transform is generally termed A) spectrum B) power spectrum C) cepstrum D) energy spectrum 13 Dilation followed by erosion operation leads to A) closing operation B) opening operation C) union operation D) intersection operation 14 Erosion followed by dilation operation leads to A) opening operation B) closing operation C) intersection operation D) union operation 15 The output of an STFT is generally termed A) mammogram B) spectrogram C) scalogram D) hologram 16 The photoreceptors that are responsible for colour vision are A) rods B) cylinders C) ciliary muscles D) cones 17 The technique in which uniform threshold is applied uniformly throughout the wavelet tree is A) VisuShrink B) LevelShrink C) SureShrink D) BayesShrink 18 The transform that is effective in detecting lines in an image is A) Fourier B) Hough C) Wavelet D) Hadamard 19 Which of the following operations is idempotent? A) Dilation B) Erosion C) Convolution D) Closing 20 Which of the following filters will in general have the best performance in enhancing edges in an image? A) Mean filter B) Median filter C) Laplace filter D) Mode filter 21 The operator which can be used to detect the edges in an image is A) adder B) integrator C) multiplier D) differentiator 22 The colour model which is more relevant to a display system is the A) RGB model B) CMY model C) HSI model D) YIQ model 23 The image file format that can support simple animation is A) GIF87a B) GIF89a C) TIFF D) JPEG 24 The parameter that may change if all the pixels in an image are shuffled is A) mean B) entropy C) histogram D) covariance 25 In a DPCM coder, which of the following needs to be quantised? A) The prediction value B) The transform coefficient C) The reconstruction value D) Difference between the prediction value and original value 26 The application of a Laplacian operator to a 2D Gaussian function results in A) Haar wavelet B) Mexican-hat wavelet C) Daubechies wavelet D) Coiflet 27 The Fourier transform of a 2D Gaussian function results in a two-dimensional A) sinc function B) step function C) Gausssian function D) comb function 28 In multi-stage vector quantisation, except the first stage, the input to the successive stages are A) input vectors B) error vectors from the previous stage C) quantised input vectors D) input vectors with some gain 29 The total number of bits required to represent a 256 × 256 image with 256 gray level is A) 524288 B) 65536 C) 16777216 D) 131072 30 Entropy coding is basically a A) lossless coding which exploits the psychovisual redundancy B) lossy coding which exploits the psychovisual redundancy C) lossless coding which exploits the statistical redundancy D) lossy coding which exploits the statistical redundancy
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Course-wide Content MATLAB Codes Downloadable Images fr... Chapter on Video Proce... Chapter wise Summary List of Acronyms Image Processing Taxon... Web Links Interactive Quiz

Instructor Resources PowerPoint Slides Course-wide Content MATLAB Codes Downloadable Images fr... Chapter on Video Proce... Chapter wise Summary List of Acronyms Image Processing Taxon... Web Links Interactive Quiz