A method implemented on a computing device including at least one processor, at least one storage medium, and a communication platform connected to a network, the method comprising: obtaining low-frequency component of a first image by performing a low-pass filtering on the first image, wherein the first image includes a visible light image and the low-frequency component of the first image includes a luminance of each element of the first image, wherein, for each element in the low-frequency component of the first image, determining whether the luminance of the element is less than a predetermined luminance threshold; and in response to determining that the luminance of the element is less than the predetermined luminance threshold, adjusting the luminance of the element by increasing the luminance of the element; determining a first luminance weight map corresponding to the low-frequency component of the first image based on the adjusted luminance of each element of the first image; obtaining low-frequency component of a second image by performing the low-pass filtering on the second image, wherein the second image includes an infrared image and the low-frequency component of the second image includes a luminance of each element of the second image; determining a second luminance weight map corresponding to the low-frequency component of the second image based on the luminance of each element of the second image; and determining a fused image based on the low-frequency component of the first image, the first luminance weight map, the low-frequency component of the second image, and the second luminance weight map. obtaining low-frequency component of a first image by performing a low-pass filtering on the first image, wherein the first image includes a visible light image and the low-frequency component of the first image includes a luminance of each element of the first image, wherein, for each element in the low-frequency component of the first image, determining whether the luminance of the element is less than a predetermined luminance threshold; and in response to determining that the luminance of the element is less than the predetermined luminance threshold, adjusting the luminance of the element by increasing the luminance of the element; determining whether the luminance of the element is less than a predetermined luminance threshold; and in response to determining that the luminance of the element is less than the predetermined luminance threshold, adjusting the luminance of the element by increasing the luminance of the element; determining a first luminance weight map corresponding to the low-frequency component of the first image based on the adjusted luminance of each element of the first image; obtaining low-frequency component of a second image by performing the low-pass filtering on the second image, wherein the second image includes an infrared image and the low-frequency component of the second image includes a luminance of each element of the second image; determining a second luminance weight map corresponding to the low-frequency component of the second image based on the luminance of each element of the second image; and determining a fused image based on the low-frequency component of the first image, the first luminance weight map, the low-frequency component of the second image, and the second luminance weight map.