The creation of consistent underwater photomosaics is§typically hampered by local misalignments and§inhomogeneous illumination of the image frames, which§introduce visible seams that complicate§post-processing of the mosaics for object recognition§and shape extraction. In this work, methods are§proposed to improve blending techniques for§underwater photomosaics and the results are compared§with traditional methods. Five specific techniques§drawn from various areas of image processing,§computer vision, and computer graphics have been§tested: illumination correction based on the median§mosaic, thin-plate spline warping, perspective§warping, graph-cut applied in the gradient domain and§in the wavelet domain. A combination of the first two§methods yields globally homogeneous underwater§photomosaics with preserved continuous features. §Further improvements are obtained with the graph-cut§technique applied in the spatial domain. Skryť popis