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guidance image

A guidance image is a reference image used in image processing and computer vision to direct and control the filtering, enhancement, or reconstruction of a target image or data map. It supplies structural and spatial information, such as sharp edges, gradients, and local textures, which serve as priors for operations like edge-preserving smoothing, upsampling, denoising, and color transfer. A guidance image can either be the input image itself or a separate, often higher-resolution or cross-modal image, enabling the transfer of detailed boundary and texture features onto target outputs—such as low-resolution depth maps, alpha mattes, or tone-mapped layers—while preventing blurring and color bleeding across visual boundaries.

1 item

Joint bilateral upsampling

Joint bilateral upsampling

Johannes Kopf, Michael F. Cohen, Dani Lischinski, Matt Uyttendaele

OrganizationsMicrosoftThe Hebrew University of JerusalemUniversity of Konstanz

Why you should read this

Proposes a fast edge-preserving method that uses high-resolution guide images to accurately upsample low-resolution computational solutions in tone mapping, stereo depth, colorization, and segmentation tasks.

Image analysis and enhancement tasks such as tone mapping, colorization, stereo depth, and photomontage, often require computing a solution (e.g., for exposure, chromaticity, disparity, labels) over the pixel grid. Computational and memory costs often require that a smaller solution be run over a downsampled image. Although general purpose upsampling methods can be used to interpolate the low resolution solution to the full resolution, these methods generally assume a smoothness prior for the interpolation. We demonstrate that in cases, such as those above, the available high resolution input image may be leveraged as a prior in the context of a joint bilateral upsampling procedure to produce a better high resolution solution. We show results for each of the applications above and compare them to traditional upsampling methods.

Added

2026-09-25