Ortho-rectification method for additional constraint condition of ultra-wide linear array image

Abstract

Aiming at the defects that ultra-wide linear array image inter-row exterior orientation elements have strong correlation and linear array sensor edge distortion is large, the invention provides an ultra-wide linear array image rigorous ortho-rectification method with additional constraint conditions (angle consistency constraint and coplanar constraint), which comprises the following steps: (1) collecting ground control points; (2) constructing a rigorous model with additional constraint conditions; and (3) carrying out rigorous ortho-rectification processing on the ultra-wide linear array image. According to the method, the exterior orientation elements are decoupled through the constraint conditions, the solving precision of the exterior orientation elements of the ultra-wide linear array image is improved, the ortho-rectification result of the ultra-wide linear array image is improved, a new solution is provided for ortho-rectification of the ultra-wide linear array image, and the application range of the ultra-wide linear array image is expanded. Moreover, the model is less affected by the number of control points and the precision of an initial value, can achieve higher resolving precision while selecting relatively few control points, reduces the field workload, and saves manpower and material resources.

Description

technical field [0001] The invention relates to the fields of photogrammetry and remote sensing, in particular to the orthorectification of ultra-wide line array images in photogrammetry. Background technique [0002] As the background map of map analysis, orthophoto has the advantages of rich information, intuitive and realistic, and is widely used in military and civilian fields, such as terrain matching guidance, scene matching terminal guidance, digital city construction, urban planning and design, and geographical monitoring. Linear array CCD (Charge Coupled Device, CCD) sensors are widely used on space-based and space-based platforms such as unmanned aerial vehicles and artificial satellites to obtain image information of the target. [0003] The special structure of the line array sensor makes its imaging geometry more complicated, and it no longer conforms to the center projection in the traditional sense. The direction parallel to the CCD line array conforms to the...

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Problems solved by technology

[0005] Aiming at the defects of strong correlation and large edge deformation between the outer orientation elements of ultra-wide linear array images, the present invention proposes a strict orthorectification method for ultra-wide linear array images with additional constraints (consistency of angle constraints, coplanar constraints) , the specific description of the constraints is as follows:

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