Abstract: Image blending is a crucial process to achieve quality composite picture making in video mosaic. The method of guided interpolation by a guidance vector works well for blending two images with a relative small overlapping region in image mosaic. However, it is hard to apply the method to video mosaic, due to the large overlapping region shared by every two consecutive frames and the complex overlapping conditions among multiple frames. To deal with this problem, a framework to synchronously blend multiple images in the gradient-domain is proposed in this article: first, the mosaic plane is partitioned into several regions by the boundaries of each image; then, the guidance vector and boundary conditions are defined for each region; finally, the blending process is carried out for every region synchronously. To avoid over partition of the mosaic plane, a frame selecting scheme and a region combining algorithm are proposed. Applying the proposed framework to video mosaic achieves a fine composite picture with less consumptive computation.

Key words: multiple image, blending, gradient-domain, frame selecting, image mosaic, aerial video mosaic