A Fast Fusion Method for Multi-exposure Image in YUV Color Space

Using multiple exposures fusion to obtain high dynamic images of very large dynamic scenes, the traditional multi-resolution fusion method based on RGB color space has some shortcomings, such as low efficiency and color shift. In this paper, a method of multi-exposure fusion in YUV color space is proposed. The multi-resolution fusion based on Laplacian pyramid is carried out on Y channel, and the contrast factor and color degree factor are introduced to construct the weight map of the fusion. The maximum value of UV channel is taken to avoid color weakening caused by weighted fusion of color components. Finally, an objective evaluation of the fusion algorithm is carried out through experiments. Compared with the multi-resolution fusion based on Laplacian pyramid in traditional RGB color space, the color obtained by this method is more abundant, and the fusion time is about one-third of the traditional method.