Multifocus Image Fusion in Q-Shift DTCWT Domain Using Various Fusion Rules

Figure 4

Subtraction results of “Peppers.” (a) The ground truth image. (b) Source image blurred in the middle Pepper. (c) Source image blurred in the surroundings. (d) Subtraction image of (b). (e) Subtraction image of (c). (f) Subtraction image with Gradient Pyramid. (g) Subtraction image with Morphology Pyramid. (h) Subtraction image with Ratio Pyramid. (i) Subtraction image with Laplacian Pyramid. (j) Subtraction image with DWT. (k) Subtraction image with DTCWT1. (l) Subtraction image with DTCWT2. (m) Subtraction image with DTCWT3. (n) Subtraction image with DTCWT4. (o) Subtraction image with DTCWT5.