Abstract
Images captured from airborne imaging systems can be mosaicked for diverse remote sensing applications. The objective of this study was to identify appropriate mosaicking techniques and software to generate mosaicked images for use by aerial applicators and other users. Three software packages—Photoshop CC, Autostitch, and Pix4Dmapper—were selected for mosaicking airborne images acquired from a large cropping area. Ground control points were collected for georeferencing the mosaicked images and for evaluating the accuracy of eight mosaicking techniques. Analysis and accuracy assessment showed that Pix4Dmapper can be the first choice if georeferenced imagery with high accuracy is required. The spherical method in Photoshop CC can be an alternative for cost considerations, and Autostitch can be used to quickly mosaic images with reduced spatial resolution. The results also showed that the accuracy of image mosaicking techniques could be greatly affected by the size of the imaging area or the number of the images and that the accuracy would be higher for a small area than for a large area. The results from this study will provide useful information for the selection of image mosaicking software and techniques for aerial applicators and other users.
Highlights
Recent advances in imaging technologies have made consumer-grade digital cameras an attractive option for remote sensing applications due to their low cost, small size, compact data storage, and ease of use.[1]
A smaller area of 2.19 km[2] (219 ha) within the imaging area was selected to evaluate the effect of imaging area on the performance of different image mosaicking techniques
Accuracy assessment is critical to discern the performance of these methods
Summary
Recent advances in imaging technologies have made consumer-grade digital cameras an attractive option for remote sensing applications due to their low cost, small size, compact data storage, and ease of use.[1] consumer-grade digital cameras have been increasingly used for remote sensing applications.[2,3,4] Agricultural aircraft provide a readily available and versatile platform for airborne remote sensing. Equipping these aircraft with appropriate imaging systems can help aerial applicators acquire airborne images for agricultural applications.[1]. If individual fields need to be treated with variable-rate prescription maps, individual images may be Journal of Applied Remote Sensing
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