Majed El Helou

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Related publications (26)

Closed-Form Solution to Disambiguate Defocus Blur in Single-Perspective Images

Sabine Süsstrunk, Marjan Shahpaski, Majed El Helou

Depth-from-defocus techniques suffer an ambiguity problem where depth planes on opposite sides of the focal plane have identical defocus. We solve the ambiguity by relying on the wavelength-dependent relationship between defocus and depth. We conduct a rob ...

2019

Near-Infrared Fusion for Photorealistic Image Dehazing

Sabine Süsstrunk, Frederike Dümbgen, Natalija Gucevska, Majed El Helou

Scattering of light due to the presence of aerosol particles along the path of radiation causes atmospheric haze in images. This scattering is significantly less severe in longer wavelength bands than in shorter ones, thus the importance of near-infrared ( ...

2018

NTIRE 2018 Challenge on Spectral Reconstruction from RGB Images

Radu Timofte, Marjan Shahpaski, Ruofan Zhou, Fayez Lahoud, Majed El Helou, Dong Liu, Lei Zhang, Soumik Sarkar, Himanshu Sharma, Bing Zhang, Chang Chen

This paper reviews the first challenge on spectral image reconstruction from RGB images, i.e., the recovery of whole-scene hyperspectral (HS) information from a 3- channel RGB image. The challenge was divided into 2 tracks: the “Clean” track sought HS reco ...

2018

Fourier-Domain Optimization for Image Processing

Sabine Süsstrunk, Radhakrishna Achanta, Frederike Dümbgen, Majed El Helou

Image optimization problems encompass many applications such as spectral fusion, deblurring, deconvolution, dehazing, matting, reflection removal and image interpolation, among others. With current image sizes in the order of megabytes, it is extremely exp ...

arXiv2018

AAM: An Assessment Metric of Axial Chromatic Aberration

Sabine Süsstrunk, Frederike Dümbgen, Majed El Helou

Knowledge of lens specifications is important to identify the best lens for a given capture scenario and application. Lens manufacturers provide many specifications in their data sheets, and multiple initiatives for testing and comparing different lenses c ...

2018

Correlation-Based Deblurring Leveraging Multispectral Chromatic Aberration in Color and Near-Infrared Joint Acquisition

Sabine Süsstrunk, Zahra Sadeghipoor Kermani, Majed El Helou

2017

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