Michel Menu

L' impressionnisme entre art et science

Hermann eBooks, 2018

<title>Decorrelation Produced In The Image Of A Diffusing Object By A Rotation Of The Incident Wave-Application To The Study Of Surface States</title>

Proceedings of SPIE, Apr 18, 1978

The goal of this experiment is to demonstrate local differences in surface state on a diffusing o... more The goal of this experiment is to demonstrate local differences in surface state on a diffusing object by double speckle photography. We record on a single holographic plate two images of the diffusing object lit with coherent light; between the two exposures we slightly modify the angle of incidence of the light beam. We then use the interference fringes produced in the Fourier plane of this double photograph; their visibility characterizes the correlation between the two speckle figures, related to the local surface state. By an appropriate filtering setup it is then possible to visually localize on the image zones of different rugosity.

L' impressionnisme entre art et science

Hermann eBooks, 2018

<title>Decorrelation Produced In The Image Of A Diffusing Object By A Rotation Of The Incident Wave-Application To The Study Of Surface States</title>

Proceedings of SPIE, Apr 18, 1978

The goal of this experiment is to demonstrate local differences in surface state on a diffusing o... more The goal of this experiment is to demonstrate local differences in surface state on a diffusing object by double speckle photography. We record on a single holographic plate two images of the diffusing object lit with coherent light; between the two exposures we slightly modify the angle of incidence of the light beam. We then use the interference fringes produced in the Fourier plane of this double photograph; their visibility characterizes the correlation between the two speckle figures, related to the local surface state. By an appropriate filtering setup it is then possible to visually localize on the image zones of different rugosity.

Painting Restoration and the Eye of the Beholder: A Mobile Eye-Tracking Study at the Unterlinden Museum

Art & perception, Jun 2, 2023

Art historical literature has often discussed the impact of painting restorations on viewers. Alt... more Art historical literature has often discussed the impact of painting restorations on viewers. Although many theoretical hypotheses have been proposed regarding the effect of restoration on the beholder's eye, little empirical research has addressed this topic. This study aimed to fill this gap by investigating whether painting restoration has a meaningful influence on the visual perception of art viewers at the eye-movement level. Specifically, the study designed a mobile eye-tracking study in an ecologically valid setting -the art museum -to investigate the effects of restoration on ten panels from the Isenheim Altarpiece (1512-1516) by Matthias Grünewald, currently displayed at the Unterlinden Museum in France. In this study, 86 museum visitors looked at paintings while wearing eye-tracking glasses before (n = 43) and after (n = 43) restoration. The following measures were analyzed: (1) Total Viewing Time; (2) Duration of the First Fixation; (3) Relative Fixation Count; (4) Fixation Heat Maps; (5) Time to First Fixation in areas of interest (AOIs). The results suggested that Relative Fixation Count significantly increased after restoration. Conversely, the Total Viewing Time and Duration of the First Fixation did not seem to be significantly affected by restoration. The Heat Maps suggested a broader visual inspection of the images and a more explorative gaze pattern after restoration. Moreover, the Time to First Fixation in AOIs significantly decreased after restoration. These findings provide the first empirical evidence of the impact of restoration on the visual perception of genuine paintings as opposed to reproductions observed in a museum.

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Painting Restoration and the Eye of the Beholder: A Mobile Eye-Tracking Study at the Unterlinden Museum

Art & perception, Jun 2, 2023

Art historical literature has often discussed the impact of painting restorations on viewers. Alt... more Art historical literature has often discussed the impact of painting restorations on viewers. Although many theoretical hypotheses have been proposed regarding the effect of restoration on the beholder's eye, little empirical research has addressed this topic. This study aimed to fill this gap by investigating whether painting restoration has a meaningful influence on the visual perception of art viewers at the eye-movement level. Specifically, the study designed a mobile eye-tracking study in an ecologically valid setting -the art museum -to investigate the effects of restoration on ten panels from the Isenheim Altarpiece (1512-1516) by Matthias Grünewald, currently displayed at the Unterlinden Museum in France. In this study, 86 museum visitors looked at paintings while wearing eye-tracking glasses before (n = 43) and after (n = 43) restoration. The following measures were analyzed: (1) Total Viewing Time; (2) Duration of the First Fixation; (3) Relative Fixation Count; (4) Fixation Heat Maps; (5) Time to First Fixation in areas of interest (AOIs). The results suggested that Relative Fixation Count significantly increased after restoration. Conversely, the Total Viewing Time and Duration of the First Fixation did not seem to be significantly affected by restoration. The Heat Maps suggested a broader visual inspection of the images and a more explorative gaze pattern after restoration. Moreover, the Time to First Fixation in AOIs significantly decreased after restoration. These findings provide the first empirical evidence of the impact of restoration on the visual perception of genuine paintings as opposed to reproductions observed in a museum.

format_quoteThe study provides first empirical evidence showing restoration enhances visual perception, with decreased Time to First Fixation and broader gaze patterns.format_quote

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Leonardo da Vinci's technical practice

Hermann eBooks, 2014

Application de l'interférométrie "speckle" a l'étude de rugosité localement variable d'un objet diffusant. Influence des aberrations du système optique

Ce travail a été effectué dans le laboratoire d'Optique de Monsieur le Professeur Françon 1 qu' i... more Ce travail a été effectué dans le laboratoire d'Optique de Monsieur le Professeur Françon 1 qu' il trouve ici 1' expression de ma. reconnaissance mur son accueil 1 qu'il soit aussi renercié d'avoir bien voulu présider rron jury de thèse. Je remercie MM. Abelès 1 Hughes et I.owenthal ainsi que Mme Roblin d'avoir accepté de participer à ce jury. \._ .. Mes remerciements à Monsieur le Professeur Maréchal qui rn' a pennis de travailler dans le cadre de 1 'institut d'optique. Ce travail a été effectué sous la direction constante de Mme Roblin. Elle y a consacré son attention en permanence et je la remercie r:our son aide et tous les enseignements acquis auprès d'elle. Je remercie tout le laboratoire pour l'accueil qu'il m'a réservé et l'aide qu'il m'a apportée. Ma reconnaissance à Mme Françon 1 Mme Ménage et Mme Vu qui ont accompli la tache de dactylographier ce texte.

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L’esprit des traces

Éditions de la Maison des sciences de l’homme eBooks, 2023

Visual Exploration of Amedeo Modigliani’s Paintings: an Eye-Tracking Study

HAL (Le Centre pour la Communication Scientifique Directe), Jun 3, 2022

Chapitre 2 : Trésors de la mémoire et mode opératoire des oeuvres

EDP Sciences eBooks, Nov 4, 2020

Mas-d’Azil (Le)

Archéologie de la France-informations, Mar 1, 1997

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Determination des lignes de niveau par double photographie en lumiere coherente

Optics Communications, Sep 1, 1977

Two images of a rough curved object, illuminated by a coherent parallel beam are recorded on the ... more Two images of a rough curved object, illuminated by a coherent parallel beam are recorded on the same photographic plate. The incident beam is slightly tilted between the two exposures. In a suitable filtering set-up we observe the depth contours of the object (parallel to the photographic plate); the experimental limitations are discussed.

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Determination de rugosite par correlation des speckles dans l'image de la surface diffusante

Optics Communications, Jun 1, 1977

... L&#x27;objet D que nous avons utilis est un verre d poli, utilis en transmission. ... 360... more ... L&#x27;objet D que nous avons utilis est un verre d poli, utilis en transmission. ... 360 4. Conclusion Nous avons utilis la d corr lation produite dans l&#x27;image par une rotation du faisceau d&#x27; clairage pour tudier, partir d&#x27;un document unique, des variations locales de rugosit sur une surface ...

Determination of lens-aberrations by speckle interferometry

Journal of optics, Mar 1, 1979

... On aurait obtenu la meme inter-pretation des resultats de la figure 5, en considerant la supe... more

Challenges facing terahertz pulsed reflectometry of historical architecture

Paroi ornée et faunes paléolithiques dans la grotte de Mongautin 2 à Prat-Bonrepaux -(Ariège)

Préhistoire, art et sociétés: bulletin de la Société Préhistorique de l'Ariège, 2006

Dans les Pyrenees centrales francaises, au sud-ouest de l'Ariege, une grotte accidentellement... more

E-RIHS PP User strategy and access policies

Zenodo (CERN European Organization for Nuclear Research), Oct 7, 2020

format_quoteAccess policy permits differentiation between European and non-European users, including quotas to maintain user ratio.format_quote

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Léonard de Vinci, l’expérience de l’art

Techné/Technè, 2024

Révéler les choix matériels et techniques de Léonard de Vinci par l’analyse chimique : le cas du pigment blanc de plomb

Techné/Technè, 2024

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