Generalized Image Acquisition and Analysis

Sensor Saturation in Fourier Multiplexed Imaging

Optically multiplexed image acquisition techniques have become increasingly popular for encoding different exposures, color channels, light-fields, and other properties of light onto two-dimensional image sensors. Recently, Fourier-based multiplexing and reconstruction approaches have been introduced in order to achieve a superior light transmission of the employed modulators and better signal-to-noise characteristics of the reconstructed data. We show in this paper that Fourier-based reconstruction approaches suffer from severe artifacts in the case of sensor saturation, i.e. when the dynamic range of the scene exceeds the capabilities of the image sensor. We analyze the problem, and propose a novel combined optical light modulation and computational reconstruction method that not only suppresses such artifacts, but also allows us to recover a wider dynamic range than existing image-space multiplexing approaches.


Introduction to Image Processing and Computer Vision

Lecture in winter term 2013/14

Lecturer: Ivo Ihrke

General Information

Course webpage - Libres Savoirs

When: 2014, Jan. 23rd to 2014, Apr. 10th
Where: IOA/IOGS buiding room E201
Registration for mailing list: send email to Ivo Ihrke (firstname[dot]lastname[at]


This lecture covers basic image processing techniques in two dimensions. Special emphasis will be put on the origin of images, i.e. including detection and noise sources. Apart from that, the course will include both classic as well as more modern developments in the area.

The tentative course schedule is

Thursday 23.01.2014, 8am Introduction and Sensor Technology Overview [pdf sensors]
Thursday 31.01.2014, 8am Noise, Dynamic Range, and Color [pdf noise/dr/color]
Thursday 06.02.2014, 8am Compression and Signal Processing [pdf compression]
Thursday 13.02.2014, 8am Images as Functions [pdf functions]
Thursday 20.02.2014, 8am Distance Functions, Edge Detection and Convolutional/Non-Convolutional Filters [pdf filters]
Thursday 27.02.2014 vacances
Thursday 06.03.2014, 8am projet d'ingenieur
Thursday 13.03.2014, 8am Image Statistics, Histograms & Feature Detection [pdf stats & feature detection]
Thursday 20.03.2014, 8am cancelled
Wednesday 26.03.2014, 10am cancelled
Thursday 03.04.2014, 10am Feature Detection and Invariance [pdf feature description]
Thursday 10.04.2014, 10am Image Blending and Panoramas [pdf blending & panoramas]


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