tokens: As given in [ appendix : AppxC]Appendix C , we use the predicted mean tilts in the edge maps to extract the foveal tilt effects ( we called FTE ) which is the detected tilt angles at scale 4 ( , highlighted in red in [ fig : C1]Figs , [ fig : C2 ] ) , and also the range of detected tilt angles at fine to medium scales ( highlighted in blue boxes ) .