Consider the following pixel values for an RGB colour image: 0 0 0 0 0 0 0 0 R 255 255 255 255 255 255 255 255 255 255 255 255 255 0 255 255 255 255 255 255 255 0 154 154 255 255 130 130 154 154 255 255 130 130 154 154 255 255 130 130 154 154 255 255 130 130 154 154 255 255 130 130 68 68 68 68 68 B 68 255 255 0 68 255 255 0 68 255 255 0 68 255 255 0 68 255 255 0 Figure 1: Colour image with its (R, G, B) values. 0 0 0 0 0 (a) How many pixels are there in the colour image given in Fig. 1? Explain what is a pixel for a colour image. (b) Compute the color ratio (r, g) for all pixels of the image shown Fig. 1. Explain your computations. (c) Compute the 2D histogram of the (r, g) values using 4 bins of equal size in each dimension covering the space (r, g) = [0; 1] [0; 1]. How many bins are there in this 2D histogram? (d) What is the map (for the image Fig. 1) computed by histogram backprojection using a template histogram having only one value (r, g) = (0,0)? Explain. (e) Comment on what visual attributes in addition to colour have been used for analysing images.