The shortcoming of the traditional Laplacian pyramid (LP) transform is pointed out, and the principle and reconstruction of the improved Laplacian pyramid transform are introduced. The new reconstruction method can restrain the noise produced in the reconstruction process. The noise in the processing of the image fusion is analyzed theoretically and experimentally. The new reconstruction method can restrain the noise in the reconstruction process rather than in the index processing produre. The image fusion framework using the improved Laplacian pyramid transform is proposed and the way to determine the coefficients and the fusion procedure are introduced in detail. The subjective and objective indexes of simulation show that the proposed algorithm works better in preserving the edge and texture information than other Laplacian pyramid methods.