Fig. 13.
BSSE processing of synthetic caliber patterns. (a) Raw image of synthetic Siemens target caliber pattern with non-parallel and crossing structures. (b) BSSE-processed image. A gap can be observed near the center strong intensity region, because the algorithm processes the region as the background of the crossing region. (c) Merged image of the raw (a) and BSSE-processed (b) images. (d) Angular intensity plot of BSSE-processed image and the corresponding raw image along the red circle. BSSE shows distinct 12 caliber bars whereas raw have less resolved intensity peaks. (e) Intermediate signal-sharpened image IS’ using a halved the scale factor 0.5 × σ (see Fig. 2 caption), recovering the gap region as in (b). (f) Merged image of the original BSSE-processed (b) and adjusted intermediate image (e), showing the high-resolution structure without compromising background-like information.