A Novel Intrinsic Image Decomposition Method to Recover Albedo for Aerial Images in Photogrammetry Processing

• URL: http://arxiv.org/abs/2204.04142v1
• Date: Fri, 8 Apr 2022 15:50:52 GMT
• Title: A Novel Intrinsic Image Decomposition Method to Recover Albedo for Aerial Images in Photogrammetry Processing
• Authors: Shuang Song and Rongjun Qin
• Abstract summary: Surface albedos from photogrammetric images can facilitate its downstream applications in VR/AR/MR and digital twins. Standard photogrammetric pipelines are suboptimal to these applications because these textures are directly derived from images. We propose an image formation model with respect to outdoor aerial imagery under natural illumination conditions. We then, derived the inverse model to estimate the albedo by utilizing the typical photogrammetric products as an initial approximation of the geometry.
• Score: 3.556015072520384
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Recovering surface albedos from photogrammetric images for realistic rendering and synthetic environments can greatly facilitate its downstream applications in VR/AR/MR and digital twins. The textured 3D models from standard photogrammetric pipelines are suboptimal to these applications because these textures are directly derived from images, which intrinsically embedded the spatially and temporally variant environmental lighting information, such as the sun illumination, direction, causing different looks of the surface, making such models less realistic when used in 3D rendering under synthetic lightings. On the other hand, since albedo images are less variable by environmental lighting, it can, in turn, benefit basic photogrammetric processing. In this paper, we attack the problem of albedo recovery for aerial images for the photogrammetric process and demonstrate the benefit of albedo recovery for photogrammetry data processing through enhanced feature matching and dense matching. To this end, we proposed an image formation model with respect to outdoor aerial imagery under natural illumination conditions; we then, derived the inverse model to estimate the albedo by utilizing the typical photogrammetric products as an initial approximation of the geometry. The estimated albedo images are tested in intrinsic image decomposition, relighting, feature matching, and dense matching/point cloud generation results. Both synthetic and real-world experiments have demonstrated that our method outperforms existing methods and can enhance photogrammetric processing.

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