UniSHARP: Universal Sharp Monocular View Synthesis

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Summary

UniSHARP extends SHARP for universal monocular view synthesis across diverse camera systems (perspective, fisheye, omnidirectional) by aligning images in an omnidirectional latent space with joint feature and Gaussian space alignment. The method outperforms alternatives on a new benchmark.

In this work, we focus on extending SHARP, the popular photorealistic view synthesis method, for universal monocular rendering across a continuum of camera systems, from conventional perspective cameras to wide-field-of-view, fisheye and omnidirectional panoramic settings. To overcome the pinhole-specific assumptions of SHARP, our key idea is to align various images in a unified omnidirectional latent space. Thus, we propose UniSHARP, which performs implicit alignment in both feature and Gaussian spaces. Specifically, Gaussian primitives are arranged along rays and radial distances in a ray-based universal representation, while 2D semantic and 3D spatial features extracted from UniK3D-inspired encoders are jointly decoded to generate the complete Gaussian cloud. To comprehensively evaluate our method, we construct a benchmark covering diverse imaging systems across various scenes. The benchmark is further stratified by field of view (FoV) to enable fine-grained assessment of the universal monocular rendering task. Extensive experiments on the proposed benchmark demonstrate the effectiveness of UniSHARP, outperforming alternative methods by a large margin. The project page can be found at: https://insta360-research-team.github.io/Unisharp-website/
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Paper page - UniSHARP: Universal Sharp Monocular View Synthesis

Source: https://huggingface.co/papers/2606.07514

Abstract

UniSHARP extends SHARP for universal monocular rendering across different camera systems by aligning images in an omnidirectional latent space through joint feature and Gaussian space alignment.

In this work, we focus on extending SHARP, the popularphotorealistic view synthesismethod, foruniversal monocular renderingacross a continuum of camera systems, from conventional perspective cameras to wide-field-of-view, fisheye and omnidirectional panoramic settings. To overcome the pinhole-specific assumptions of SHARP, our key idea is to align various images in a unifiedomnidirectional latent space. Thus, we propose UniSHARP, which performs implicit alignment in both feature and Gaussian spaces. Specifically,Gaussian primitivesare arranged along rays and radial distances in aray-based universal representation, while 2D semantic and 3D spatial features extracted fromUniK3D-inspired encodersare jointly decoded to generate the completeGaussian cloud. To comprehensively evaluate our method, we construct a benchmark covering diverse imaging systems across various scenes. The benchmark is further stratified by field of view (FoV) to enable fine-grained assessment of theuniversal monocular renderingtask. Extensive experiments on the proposed benchmark demonstrate the effectiveness of UniSHARP, outperforming alternative methods by a large margin. The project page can be found at: https://insta360-research-team.github.io/Unisharp-website/

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