Fig. 5.

(a) Empirical PDF of SSIM values in the structured hallucination regions (support of ${\widehat{\theta }}_{\text{null}}^{\text{SHM}}$) and the regions spanned by the remaining pixels in the support of the image (background), respectively, for the U-Net method with OOD data. (b) and (c) Empirical PDFs of SSIM values in the structured hallucination regions for all three reconstruction methods with IND and OOD data, respectively.