The invention relates to an image adaptive fusion method, belonging to the image processing field. The invention converts image fusion in multi-imaging system into pixel interpolation method in new coordinate system, The left pixel region of the new image is completely taken from the pixel information in img1, the right region of the new image is completely taken from the img2 image data after thecoordinate information is transformed, and then the pixel information of the overlapping region in the middle is evaluated and optimized by an adaptive method, so that the pixel information of the overlapping region is fuller. The invention introduces the idea of cosine distance discriminant analysis into image fusion technology, Compared with traditional technology, it greatly reduces the possibility of image distortion after fusion, The robustness is better, which can effectively correct the possible non-uniformity of metrics when each pixel is selected, automatically select and plan the appropriate imaging point set of each camera, the result of image fusion is smoother, at the same time, the image detail information is fuller, and the overall effect is more realistic.