**xy norm**- compute the general image trend (NMR field in-homogenaety) based on the expected level of image noise IP(const). The technique is based on a re-integration of a smoothed local derivative which excludes edges (Tina memo 2000-004).**z norm**- compute the most frequent ratio between the TOS and NOS returning the ratio in IP(const).**arg**- compute phase of complex TOS image.**conj**- complex conjugate of complex TOS image.**optf**- construct optimal inverse complex filter for deconvolution from TOS image with noise level set by IP(const).

root 2017-09-26