1. A method of laser-based bore sighting, the method comprising: obtaining, from a visible-light camera, a visible-light image of a scene; obtaining, from a second camera, a plurality of images comprising a first set of images and a second set of images, wherein: the first set of images comprises images of the scene taken over a first period of time in which the laser spot is not present in the scene, and the second set of images comprises images of the scene taken over a second period of time in which the laser spot is present in the scene; combining the images in the first set of images to create a first composite image; combining the images in the second set of images to create a second composite image; creating a difference image by determining a difference in pixel values of pixels in the first composite image from pixel values of pixels in the second composite image; creating a filtered difference image by applying a Gaussian filter to the difference image; comparing one or more pixel values of one or more pixels of the filtered difference image with a threshold value to determine the location of the laser spot within the filtered difference image; and mapping the location of the laser spot within the filtered difference image to the visible-light image; and displaying the location of the laser spot in the visible-light image of the scene.