Explain radial distortion and give two examples of common radial distortion in digital images. (4 marks)...

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Explain radial distortion and give two examples of common radial distortion in digital images. (4 marks) (b) Explain the main processing steps in image warping for target-to-source mapping. (3 marks) (c) With the image centre as the origin, the following image matrix of 7x7 pixels is used as a test image to evaluate the Cartesian to polar transformation program used in automatic iris recognition. [0.2 0.2 0.2 0.4 0.4 0.4 0.4 0.2 0.2 0.4 0.6 0.6 0.6 0.4 0.2 0.4 0.6 0.8 0.8 0.6 0.4 0.4 0.6 0.8 1.0 0.8 0.6 0.4 0.2 0.4 0.6 0.8 0.8 0.6 0.4 0.2 0.2 0.4 0.6 0.6 0.6 0.4 0.2 0.2 0.2 0.4 0.4 0.4 0.4 (i) For the output image represented in the polar co-ordinates, determine the pixel value at 0= 160° and r = 2 based on the nearest neighbour interpolation. (5 marks) (ii) Repeat (c)(i) for the bilinear interpolation. (6 marks) (d) Based on the results obtained, comment on the likely effects in the output image caused by the two different interpolation methods. (2 marks) Explain radial distortion and give two examples of common radial distortion in digital images. (4 marks) (b) Explain the main processing steps in image warping for target-to-source mapping. (3 marks) (c) With the image centre as the origin, the following image matrix of 7x7 pixels is used as a test image to evaluate the Cartesian to polar transformation program used in automatic iris recognition. [0.2 0.2 0.2 0.4 0.4 0.4 0.4 0.2 0.2 0.4 0.6 0.6 0.6 0.4 0.2 0.4 0.6 0.8 0.8 0.6 0.4 0.4 0.6 0.8 1.0 0.8 0.6 0.4 0.2 0.4 0.6 0.8 0.8 0.6 0.4 0.2 0.2 0.4 0.6 0.6 0.6 0.4 0.2 0.2 0.2 0.4 0.4 0.4 0.4 (i) For the output image represented in the polar co-ordinates, determine the pixel value at 0= 160° and r = 2 based on the nearest neighbour interpolation. (5 marks) (ii) Repeat (c)(i) for the bilinear interpolation. (6 marks) (d) Based on the results obtained, comment on the likely effects in the output image caused by the two different interpolation methods. (2 marks)

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Answering according to the Homework Help Guidelines Q2 A Radial Distortion Distortion is a deviation ... View the full answer