Lines Matching full:ellipse
82 #define DEBUG_ELLIPSE 0 /* output ellipse info for debug */
556 Determine the parellelogram bounding box fitted to the ellipse
574 Do weighted resampling of all pixels, within the scaled ellipse,
575 bound by a Parellelogram fitted to the ellipse.
591 /* Q = ellipse quotent ( if Q<F then pixel is inside ellipse) */
604 /* Note that the ellipse has been pre-scaled so F = WLUT_WIDTH */
608 /* Note that the ellipse has been pre-scaled so F = support^2 */
628 /* mark the pixel according to hit/miss of the ellipse */
699 % ensure that the ellipse generated is never smaller than the unit
709 % ellipse in its "canonical form", by remapping the dx,dy of the
713 % Reference: http://en.wikipedia.org/wiki/Ellipse#Canonical_form
733 * major_y] and [minor_x,minor_y] of the smallest ellipse containing
734 * both the unit disk and the ellipse which is the image of the unit
748 * ellipse.
751 * ellipse.
777 * that it defines the modified ellipse, all you have to do is set
794 * of radius r in output space is an ellipse which contains, at
799 * ellipse and make sure that both its columns have norm at least 1.
806 * values in order to get the minor and major ellipse axis vectors.
841 * What we do is modify Jinv so that it generates an ellipse which
850 * final ellipse does not depend on the particular SVD.)
861 * final ellipse, and we can choose V to be the identity
876 * The idea of clamping up the EWA ellipse's major and minor axes so
997 % generation of a angled ellipse.
999 % As only two deritive scaling vectors are used the center of the ellipse
1014 % Producing an othogonally alligned ellipse in source space for the area to
1024 % size of the ellipse will match the support for the resampling filter being
1038 % The deritives or scaling vectors defining the EWA ellipse.
1065 /* Find Ellipse Coefficents such that
1074 resulting in a ellipse that is too small to sample properly.
1114 ellipse, for weighted averaging. No scaling will result with F == 4.0 and
1132 /* Figure out the various information directly about the ellipse.
1153 /* other information about ellipse include... */
1175 /* Scale ellipse to match the filters support
1182 /* Orthogonal bounds of the ellipse */
1186 /* Horizontally aligned parallelogram fitted to Ellipse */
1206 /* Scale ellipse formula to directly index the Filter Lookup Table */
1307 /* save the filter and the scaled ellipse bounds needed for filter */
