LASER SPOT FINDING

摘要

Techniques are disclosed for determining the location of laser spot in an image, enabling wind sensing to be performed on captured images of the laser spot. Techniques can include image averaging, background subtraction, and filtering to help ensure that the Gaussian laser spot is detected in the image. Embodiments may include defining a bounding region and altering the operation of a camera such that the camera does not provide pixel data from pixels sensors corresponding pixels of outside the bounding region in subsequent image captures. Embodiments may additionally or alternatively include extracting two stereoscopic images from a single image capture.

主权项

1. A method of determining a location of a laser spot in an image, the method comprising:
obtaining, from a 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 a scene taken over a first period of time in which the laser spot is not present in the scene, andthe 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; and 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.