| 摘要 |
<p>An image of a scene partially obscured by atmospheric backscattered light is enhanced by taking account of variations in the mean backscattered flux component resulting from variations in the distance between the point from, which the image is captured and points in the terrain contributing to the scene. A series of images of the scene is captured, and an averaged image is produced in which each pixel has a brightness which is an average of the brightness of those portions of the captured images that represent the same region of the scene as that pixel. A model is defined to represent the relationship between the brightness of a pixel of the averaged image and the distance between the point of view from which the image represents and the point in the scene represented by that pixel of the image. An estimate of the contribution of atmospheric backscattered light to the brightness of each pixel of the image is computed from the model. The estimated contribution for each pixel is then subtracted from the brightness of that pixel of the image to produce a modified brightness for that element. The image is reconstructed with each element of the reconstructed image having a brightness which is a function of the modified brightness of that element.</p> |
