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Semantic Awareness for Automatic Image Interpretation

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Color Demosaicing by Estimating Luminance and Opponent Chromatic Signals in the Fourier Domain

Sabine Süsstrunk

We propose a new method for color demosaicing based on a mathematical model of spatial multiplexing of color. We demonstrate that a one-color per pixel image can be written as the sum of luminance and chrominance. In case of a regular arrangement of colors ...

2002

Color Contrast Detection in Spatial Chromatic Noise

Gianluca Monaci, Gloria Menegaz

In this report, higher order color mechanisms for the detection of spatial distributions of color are investigated. The objective of this work is to understand which are the visual mechanisms involved in chromatic detection tasks and to dene the properties ...

2002

3-D Reconstruction of DNA Filaments from Stereo Cryo-Electron Micrographs

Michaël Unser, Thierry Blu, Mathews Jacob

We propose an algorithm for the 3-D reconstruction of DNA filaments from a pair of stereo cryo-electron micrographs. The underlying principle is to specify a 3-D model of a filament—described as a spline curve—and to fit it to the 2-D data using a snake-li ...

IEEE2002

Improved red color with cholesteric liquid crystals in Bragg reflection mode

Hans Peter Herzig, René Dändliker

The helical pitch of the cholesteric liquid crystal (CLC) can be adjusted to reflect the colors red, green, and blue. Additive mixing of these colors in displays results in multicolor images and it is easy to use pure primary blue and green colors, but the ...

2002

MIP: The ITS-EPFL Medical Image Processing Library

Jean-Philippe Thiran, Meritxell Bach Cuadra, Olivier Cuisenaire, Torsten Butz

This document presents a brief description of the Medical Image Processing (MIP) library developed by the Brain Group of the Signal Processing Institute (ITS) at Swiss Federal Institute of Technology (EPFL). This library is a result of more than three year ...

2002

Optimization for Hue Constant RGB Sensors

Sabine Süsstrunk

We present an optimization technique to find hue constant RGB sensors. The hue representation is based on a log RGB opponent color space that is invariant to brightness and gamma. While modeling the visual response did not derive the opponent space, the hu ...

2002

Opponent Color Space Motivated by Retinal Processing

Sabine Süsstrunk, Silvio Borer

We introduce a new opponent color space, which aims to mimic the color processing in the primate retina. Recent data from physiology and morphology are used to determine the model and its parameters. The input signal in LMS representation is first nonlinea ...

2002

Method for generating a security document

Roger Hersch

The described method is used for generating a security document by applying a security pattern to an original image. The security pattern comprises a plurality of points, wherein each of said points represents a pattern value. Local averages are calculated ...

2001

Color Handling in Panoramic Photography

Sabine Süsstrunk, David Hasler

Nowadays, the ability to create panoramic photographs is included with most of the commercial digital cameras. The principle is to shoot several pictures and stitch them together to build a panorama. To ensure the quality of the final image, the different ...

2001

Automated cartographic annotation of digital images

Martin Vetterli, Serge Ayer

For annotating a digital image with information from a digital map, features which are visible from a viewer position are extracted from the map. The extracted features are matched with corresponding features in the image, and feature annotations are trans ...

2001