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A four-step ortho-rectification procedure for geo-referencing video streams from a low-cost UAV

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posted on 2023-06-08, 22:11 authored by B O Olawale, Chris ChatwinChris Chatwin, Rupert YoungRupert Young, Phil BirchPhil Birch, F O Faithpraise, A O Olukiran
In this paper, we present a four-step ortho-rectification procedure for real-time geo-referencing of video data from a low-cost UAV equipped with a multi-sensor system. The basic procedures for the real-time ortho-rectification are: (1) decompilation of the video stream into individual frames; (2) establishing the interior camera orientation parameters; (3) determining the relative orientation parameters for each video frame with respect to each other; (4) finding the absolute orientation parameters, using a self-calibration bundle and adjustment with the aid of a mathematical model. Each ortho-rectified video frame is then mosaicked together to produce a mosaic image of the test area, which is then merged with a well referenced existing digital map for the purpose of geo-referencing and aerial surveillance. A test field located in Abuja, Nigeria was used to evaluate our method. Video and telemetry data were collected for about fifteen minutes, and they were processed using the four-step ortho-rectification procedure. The results demonstrated that the geometric measurement of the control field from ortho-images is more accurate when compared with those from original perspective images when used to pin point the exact location of targets on the video imagery acquired by the UAV. The 2-D planimetric accuracy when compared with the 6 control points measured by a GPS receiver is between 3 to 5 metres.

History

Publication status

  • Published

File Version

  • Published version

Journal

International Journal of Computer, Electrical, Automation, Control and Information Engineering

Publisher

World Academy of Science, Engineering and Technology

Issue

8

Volume

9

Page range

1892-1899

Event name

ICCVTA 2015 : 17th International Conference on Computer Vision Theory and Applications

Event location

NH Laguna Palace Viale Ancona, 2 30172 Mestre, Venezia, Italy,

Event type

conference

Event date

August 13th – 14th, 2015

Department affiliated with

  • Engineering and Design Publications

Research groups affiliated with

  • Industrial Informatics and Signal Processing Research Group Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2015-08-21

First Open Access (FOA) Date

2015-08-21

First Compliant Deposit (FCD) Date

2015-08-21

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