How to compensate the effect of using an incomplete wavelet base to reconstruct an image? Application in psychovisual experiment

Abstract : One way in psychovisual experiment to understand human visual system is to analyze separately contents of different spatial frequency bands. To prepare images for this purpose, we proceed to a decomposition of the original image by a wavelet transform centered on selected scales. The wavelets used are Difference Of Gaussians (DOG) according to works modeling the human visual system. Before rebuilding the visual stimulus, various transformations can be performed on different scales to measure the efficiency of the observer, for a given task, according to the spatial frequencies used. The problem is that if we use an incomplete wavelet basis during decomposition, there is a significant loss of information between the original image and the reconstructed image. The work presented here offers a way to solve this problem by using coefficients appropriate for each scale during the decomposition step.
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Conference papers
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https://hal.archives-ouvertes.fr/hal-00762836
Contributor : Frédéric Davesne <>
Submitted on : Saturday, December 8, 2012 - 12:04:10 PM
Last modification on : Monday, October 28, 2019 - 10:50:21 AM

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Sylvie Lelandais, Justin Plantier. How to compensate the effect of using an incomplete wavelet base to reconstruct an image? Application in psychovisual experiment. 6th Internation Conference on Bio-Inspired Systems and Signal Processing (BIOSIGNALS 2013), Feb 2013, Barcelona, Spain. pp.271--275. ⟨hal-00762836⟩

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