Fig. 5
From: Real-time algorithm for Poissonian noise reduction in low-dose fluoroscopy: performance evaluation
Profiles across the edge outlined in Fig. 4a for the raw image, the image filtered via NVCA algorithm (7 × 7 × 7 mask T = 2σ) and that filtered with a 7 × 7 × 7 average filter. Continuous lines represent the fitting curves adopted. The fitting parameter R2 is 0.9782 for the raw data, 0.9970 in the case of the average filter and 0.9977 in the case of the NVCA filter