pdft.coherence.dense_operator

pdft.coherence.dense_operator(basis)

The basis as an explicit matrix acting on vec(image).

Column j is the transform of the image that is 1 at pixel j and 0 elsewhere, so the result is (2^m 2^n) x (2^m 2^n).

This is a diagnostic, not a code path: it costs N^2 transforms of an N-pixel image and is meant for small m, n. Nothing in training needs it — certify_flat_modulus gives the parameter-space guarantee without forming it.

Return type:

Array