2-18

• 0:17:24: Q1 What would be the T matrix for scaling an image by s times in both directions? ANS: [s,0;0,s]

• 0:20:44: Q2. What is the inverse of the earlier scaling operation? ANS: [1s,0;0,1s]

• 0:23:33: Q3 What is the T matrix to rotate an image counter clockwise by theta degree? ANS: [cos(theta),-sin(theta);sin(theta),cos(theta)]

• 0:38:24: Q4 What is the inverse of R? ANS: [cos(theta),sin(theta);-sin(theta),cos(theta)]

• 0:45:24: Q6 What is the transform matrix for this mirror operation? ANS: [-1 0;0 1]

• 0:48:51: Q7 What is T for the mirror operation across line y=x? ANS: [0 1;1 0]

• 0:51:42: Q8 Can we use linear transformation to represent translation? ANS: no

• 1:18:34: Q9 Do you think this warping operation is affined? ANS: no