A system (200, 1700) comprising: a plurality of projectors, each comprising an image modulator, the plurality of projectors located to project respective projector images, formed by respective image modulators, a plurality of projector images overlapping in one or more overlap regions, the plurality of projector images corresponding to black images; at least one sensor (214, 1714) configured to acquire digital images of at least portions of the plurality of projector images; and a computing device configured to, for each given projector comprising a given image modulator, of the plurality of projectors: determine, using the at least one sensor (214, 1714), respective correspondences between projected points of a given projector image and respective points of respective image modulators of other projectors of the plurality of projectors, the respective correspondences representing the respective points of the respective image modulators of the other projectors that correspond to the one or more overlap regions; determine respective brightness of the one or more overlap regions; and, control pixels of the given image modulator and each of the respective image modulators, outside the one or more overlap regions and at least adjacent edge pixels corresponding to edges of the one or more overlap regions, to increase brightness in corresponding projector image regions based on the respective brightness, thereby black level blending the plurality of projector images, characterized in that the respective correspondences include correspondences associated with respective dead zone pixels of the given image modulator and the respective other image modulators, said respective dead zone pixels being respective pixels which are always off and which surround the respective perimeters of the respective active areas that form the respective projector images of the respective image modulators. a plurality of projectors, each comprising an image modulator, the plurality of projectors located to project respective projector images, formed by respective image modulators, a plurality of projector images overlapping in one or more overlap regions, the plurality of projector images corresponding to black images; at least one sensor (214, 1714) configured to acquire digital images of at least portions of the plurality of projector images; and a computing device configured to, for each given projector comprising a given image modulator, of the plurality of projectors: determine, using the at least one sensor (214, 1714), respective correspondences between projected points of a given projector image and respective points of respective image modulators of other projectors of the plurality of projectors, the respective correspondences representing the respective points of the respective image modulators of the other projectors that correspond to the one or more overlap regions; determine respective brightness of the one or more overlap regions; and, control pixels of the given image modulator and each of the respective image modulators, outside the one or more overlap regions and at least adjacent edge pixels corresponding to edges of the one or more overlap regions, to increase brightness in corresponding projector image regions based on the respective brightness, thereby black level blending the plurality of projector images, characterized in that the respective correspondences include correspondences associated with respective dead zone pixels of the given image modulator and the respective other image modulators, said respective dead zone pixels being respective pixels which are always off and which surround the respective perimeters of the respective active areas that form the respective projector images of the respective image modulators. determine, using the at least one sensor (214, 1714), respective correspondences between projected points of a given projector image and respective points of respective image modulators of other projectors of the plurality of projectors, the respective correspondences representing the respective points of the respective image modulators of the other projectors that correspond to the one or more overlap regions; determine respective brightness of the one or more overlap regions; and, control pixels of the given image modulator and each of the respective image modulators, outside the one or more overlap regions and at least adjacent edge pixels corresponding to edges of the one or more overlap regions, to increase brightness in corresponding projector image regions based on the respective brightness, thereby black level blending the plurality of projector images, characterized in that the respective correspondences include correspondences associated with respective dead zone pixels of the given image modulator and the respective other image modulators, said respective dead zone pixels being respective pixels which are always off and which surround the respective perimeters of the respective active areas that form the respective projector images of the respective image modulators.