Table 1.

Walnut test images with gradient-domain sparsity levels, number of projections at which recovery is observed, and DT and ALMT phase-diagram predictions of critical sampling levels. A reference point of full sampling is N_v≥403 projections, where the system matrix has more rows than columns.

walnut image	gradient sparsity	recovered at	DT prediction	ALMT prediction
structure	45 074	68	69.3	71.7
texture	186 306	?	188.7	185.8