METHOD AND APPARATUS FOR ANALYZING STEREOSCOPIC OR MULTI-VIEW IMAGES
A method and an apparatus for analyzing stereoscopic or multi-view images are described. A two-dimensional map associated to the stereoscopic or multi-view images is retrieved and segmented into a plurality of tiles. Then an analysis of the tiles of the two-dimensional map is performed. An analysis result for the two-dimensional map is determined from results of the analysis of the tiles of the two-dimensional map.
1 . A method for analyzing stereoscopic or multi-view images, the method comprising the steps of:
retrieving a two-dimensional map associated to the stereoscopic or multi-view images;
segmenting the two-dimensional map into a plurality of tiles;
performing an analysis of the tiles of the two-dimensional map; and
determining an analysis result for the two-dimensional map from results of the analysis of the tiles of the two-dimensional map.
2 . The method according to claim 1 , wherein the results of the analysis of the tiles of the two-dimensional map are gathered using counters.
3 . The method according to claim 1 , wherein analysis parameters are determined based on a downscaling factor that was used to downscale the stereoscopic input or multi-view images prior to generating the two-dimensional map.
4 . The method according to claim 3 , wherein the analysis parameters include at least one of a horizontal tile size, a vertical tile size, and one or more thresholds for detecting or confirming incidents within the tiles.
5 . The method according to claim 1 , further comprising the steps of:
determining whether the analysis of one or more tiles of the two-dimensional yielded an incident;
comparing the number of tiles for which the analysis yielded an incident with a threshold; and
determining that the stereoscopic or multi-view images do not pass the analysis if the number of tiles for which the analysis yielded an incident exceeds the threshold.
6 . The method according to claim 1 , further comprising the steps of:
determining whether the analysis of one or more tiles of the two-dimensional map failed;
comparing the number of tiles for which the analysis failed with a threshold; and
determining that the analysis of the two-dimensional map failed if the number of tiles for which the analysis failed exceeds the threshold.
7 . The method according to claim 1 , wherein analysis results of small tiles are weighted with a weighting factor.
8 . The method according to claim 1 , wherein a histogram analysis is performed on the tiles.
9 . The method according to claim 1 , wherein the step of segmenting the two-dimensional map into a plurality of tiles is repeated to generate a horizontally and/or vertically shifted grid of tiles.
10 . The method according to claim 1 , wherein the two-dimensional map is a disparity map, a confidence map, or one of the stereoscopic or multi-view images or a reduced version thereof.
11 . An apparatus for analyzing stereoscopic or multi-view images, wherein the apparatus comprises:
an input for retrieving a two-dimensional map associated to the stereoscopic or multi-view images;
a segmenter for segmenting the two-dimensional map into a plurality of tiles;
an analyzer for performing an analysis of the tiles of the two-dimensional map; and
a comparator for determining an analysis result for the two-dimensional map from results of the analysis of the tiles of the two-dimensional map.