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How to create hybrid image using image filtering 1. Main idea - 1. Hybrid image: an image with chaning perception based on distance. - 2. Mechanism: Higher frequency survives in longer distance. 2. Related math - 1. covariance matrix 协方差矩阵: if we examine N-dimensional samples (N rows), the Cij element in matrix will be the covariance of the row i and row j. - 2. covariance 协方差: a metric showing how “correlated” the two variables are, or the tendency in the linear relationship between the two...