Continuum contrast (top), apparent longitudinal field strength B_app,los (middle) and LOS velocity v_los (bottom) for three examples of boxes in active region plage (left), strong network (middle) and weak network (right), respectively. All the boxes are located at disk center (μ > 0.99). The weak network box has been cropped to a subfield of 20″ × 20″ for better visibility, although its original size is 70″ × 70″. Yellow contours in top left: pores (see main text) excluded from the scatterplot of contrast vs. B_app,los (Fig. 2) and from the averaged contrasts (Fig. 7). Red contours (top) and black contours (bottom): delimit the areas where B_app,los > 100 G (magnetic patches) from the weakly magnetized areas whose mean intensity is used as reference for the contrast (see Eq. (2)). Green contours (middle and bottom): delimit the location of the pixels where B_app,los > 500 G, so that the region between black and green contours has 100 G  < B_app,los < 500 G.