公开(公告)号：US20190333235A1

公开(公告)日：2019-10-31

申请号：US16475259

申请日：2018-01-16

Applicant: THE SECRETARY OF STATE FOR DEFENCE

Inventor： JOHN EDWARD DAWSON

IPC: G06T7/32 ,  G06T5/00 ,  G06T5/50

Abstract: A method and apparatus are provided for registering a base recorded image (9) of an object or terrain with a secondary recorded image (10) of the object or terrain, using a base image sensor model (12), secondary image sensor model (13) and elevation information (11). A plurality of biases (24) and respective matched biases (29) are applied to the secondary image sensor (model 13) and base image sensor model (12), to determine a plurality of corrected sensor models (26) and respective nominally corrected base image sensor models (31). Each corrected sensor model (26) and respective nominally corrected base image sensor model (31) is used to reproject (27) the secondary recorded image (10), and in each case the reprojected secondary recorded image is correlated (19) with the base recorded image (12) to ascertain a correlation score (20) and adjustments to the bias corrections (32). The correlation score being evaluated to determine optimally corrected sensor models and and/or an optimally transformed image.

公开(公告)号：US20200380636A1

公开(公告)日：2020-12-03

申请号：US16319521

申请日：2017-08-04

Applicant: THE SECRETARY OF STATE FOR DEFENCE

Inventor： JOHN EDWARD DAWSON

IPC: G06T3/00 ,  G06T7/32

Abstract: A method and apparatus are provided for generating enhanced digital imagery from digital input images (7) exhibiting differences other than or in excess of differences in projection. By applying a plurality of image transformations (10) to frequency normalised (8) versions of the input images, and generating measures of image similarity (11) therefrom, an optimum image transformation (12) can be determined that can be applied to the digital input images such that they are substantially matched. Digital input images of physical objects or environments to which the method is applied can then be used in image fusion, ortho-rectification or change detection applications, in order to monitor the physical object or environment.