IEEE Trans Pattern Anal Mach Intell - As-Projective-As-Possible Image Stitching with Moving DLT.

Tópicos

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Resumo

The success of commercial image stitching tools often leads to the impression that image stitching is a "solved problem". The reality, however, is that many tools give unconvincing results when the input photos violate fairly restrictive imaging assumptions; the main two being that the photos correspond to views that differ purely by rotation, or that the imaged scene is effectively planar. Such assumptions underpin the usage of 2D projective transforms or homographies to align photos. In the hands of the casual user, such conditions are often violated, yielding misalignment artifacts or "ghosting" in the results. Accordingly, many existing image stitching tools depend critically on post-processing routines to conceal ghosting. In this paper, we propose a novel estimation technique called Moving Direct Linear Transformation (Moving DLT) that is able to tweak or fine-tune the projective warp to accommodate the deviations of the input data from the idealised conditions. This produces as-projective-as-possible image alignment that significantly reduces ghosting without compromising the geometric realism of perspective image stitching. Our technique thus lessens the dependency on potentially expensive postprocessing algorithms. In addition, we describe how multiple as-projective-as-possible warps can be simultaneously refined via bundle adjustment to accurately align multiple images for large panorama creation.

Resumo Limpo

success commerci imag stitch tool often lead impress imag stitch solv problem realiti howev mani tool give unconvinc result input photo violat fair restrict imag assumpt main two photo correspond view differ pure rotat imag scene effect planar assumpt underpin usag d project transform homographi align photo hand casual user condit often violat yield misalign artifact ghost result accord mani exist imag stitch tool depend critic postprocess routin conceal ghost paper propos novel estim techniqu call move direct linear transform move dlt abl tweak finetun project warp accommod deviat input data idealis condit produc asprojectiveasposs imag align signific reduc ghost without compromis geometr realism perspect imag stitch techniqu thus lessen depend potenti expens postprocess algorithm addit describ multipl asprojectiveasposs warp can simultan refin via bundl adjust accur align multipl imag larg panorama creation

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