Comparison of Imaging Modalities derived from (orientation independent) Differential Interference Contrast Microscopy                      

                           Fully integrated (quantitative) phase                                                                               Inverse Riesz phase

fully integrated, quantitative phase inverse Ries phase
X differential phase modulus of gradient high contrast
                             X differential phase                                                                                                       Modulus of gradient of phase

Some details:
Inverse Riesz phase

riesz

Fully integrated (quantitative) phase

quantitative