Question: Question 2. (a) Describe the aims and differences between the processes of inten- sity normalisation and histogram equalisation. [9 marks] (b) A monochrome camera is

Question 2. (a) Describe the aims and differences between the processes

Question 2. (a) Describe the aims and differences between the processes of inten- sity normalisation and histogram equalisation. [9 marks] (b) A monochrome camera is known to have a poor response to low light and an excessive response to bright illumination. For grey levels between zero and 127 the gain is 0.5 whereas for grey levels between 128 and 255 the gain is 1.5. Sketch the relationship between camera output and grey level. Describe using pseudocode an operator that normalises the output so that the effective camera gain for all grey levels is 1.0. [16 marks] (c) One (rather dated) approach to find image features of interest is to apply histogram equalisation followed by optimised thresholding. Dis- cuss advantages and limitations of your new approach developed in part (b), followed by a form of thresholding, in comparison with the histogram equalisation based approach. [8 marks]

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