Fig. 8
From: Optimizing compositional images of daguerreotype photographs using post processing methods
Relative Variance of raw versus Haar-Fisz transformed images. The result of tracking the variance in four regions of the Two Boys image is shown. Inset: the Haar-Fisz transformed image is shown with yellow rectangles representing the areas sampled for computation. The data from the Haar-Fisz transformed image is shown as blue dots, and the data from the raw image is shown in magenta. Relative variance is represented by the variance divided by the mean