HDR Reconstruction for Alternating Gain (ISO) Sensor Readout
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Date
2014
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association
Abstract
Modern image sensors are becoming more and more flexible in the way an image is captured. In this paper, we focus on sensors that allow the per pixel gain to be varied over the sensor and develop a new technique for efficient and accurate reconstruction of high dynamic range (HDR) images based on such input data. Our method estimates the radiant power at each output pixel using a sampling operation which performs color interpolation, re-sampling, noise reduction and HDR-reconstruction in a single step. The reconstruction filter uses a sensor noise model to weight the input pixel samples according to their variances. Our algorithm works in only a small spatial neighbourhood around each pixel and lends itself to efficient implementation in hardware. To demonstrate the utility of our approach we show example HDR-images reconstructed from raw sensor data captured using off-the shelf consumer hardware which allows for two different gain settings for different rows in the same image. To analyse the accuracy of the algorithm, we also use synthetic images from a camera simulation software.
Description
@inproceedings{10.2312:egsh.20141006,
booktitle = {Eurographics 2014 - Short Papers},
editor = {Eric Galin and Michael Wand},
title = {{HDR Reconstruction for Alternating Gain (ISO) Sensor Readout}},
author = {Hajisharif, Saghi and Kronander, Joel and Unger, Jonas},
year = {2014},
publisher = {The Eurographics Association},
ISSN = {1017-4656},
ISBN = {},
DOI = {10.2312/egsh.20141006}
}