31 results on '"Patrick Monnier"'
Search Results
2. Cardio-oncologie : une discipline en devenir
- Author
-
Stefania Aur, Sabina Rosset, Patrick Monnier, Alix Stern, and Cyril Pellaton
- Subjects
General Medicine - Published
- 2021
- Full Text
- View/download PDF
3. [Cardio-oncology : a specialty for the future]
- Author
-
Stefania, Aur, Sabina, Rosset, Patrick, Monnier, Alix, Stern, and Cyril, Pellaton
- Subjects
Neoplasms ,Humans ,Antineoplastic Agents ,Heart ,Medical Oncology ,Cardiotoxicity - Abstract
Cardio-oncology is a specialty that has rapidly progressed during the last decade. Modern cancer therapies have shown a significant positive impact on the survival of cancer patients. Alongside the progress in oncological treatments came a wide array of cardiac toxicities. The development of cardiotoxicity can lead to unfortunate outcomes. Ensuring the optimal oncological treatment while protecting the heart and vascular system constitute the main objectives of the cardio-oncology unit. Its purpose is to prevent, treat and provide adequate follow-up of patients subject to cardiotoxic drugs.La cardio-oncologie est une discipline qui a connu un très grand essor ces dernières années. Le développement rapide des nouveaux traitements oncologiques a eu comme effet l’amélioration de la survie des patients mais également leur exposition à une toxicité sur le système cardiovasculaire (cardiotoxicité). Le développement d’une cardiotoxicité a un impact négatif sur la survie de ces patients. Le but de la cardio-oncologie est d’assurer un traitement oncologique optimal tout en protégeant les patients des effets cardiotoxiques. Sa stratégie est de prévenir, identifier et traiter la cardiotoxicité.
- Published
- 2021
4. Configural asymmetries in a visual search task
- Author
-
Joshua Edler, Patrick Monnier, Mouna Attarha, and David Birks
- Subjects
Visual search ,Orientation (computer vision) ,Cognitive Neuroscience ,media_common.quotation_subject ,Eye movement ,Experimental and Cognitive Psychology ,Cognition ,Asymmetry ,Task (project management) ,Arts and Humanities (miscellaneous) ,Perception ,Visual attention ,Psychology ,media_common ,Cognitive psychology - Abstract
Configural asymmetries refer to a phenomenon in which the orientation of search elements causes an asymmetry in visual performance. Here, we present configural asymmetries with bicolour disk elements (left/right vs. up/down configuration). Reaction time was significantly faster for up/down compared to left/right elements. Although extensive practice with the task resulted in better overall search performance, the magnitude of the asymmetries was remarkably resistant to practice. An account of these configural asymmetries based on eye movements was ruled out by presenting displays as flashes (96 ms). Although a more complete description of the factors involved in these configural asymmetries is needed, the effects could be implemented in a model by applying different spatial weights for the processing of objects.
- Published
- 2010
- Full Text
- View/download PDF
5. Standard definitions of chromatic induction fail to describe induction with S-cone patterned backgrounds
- Author
-
Patrick Monnier
- Subjects
S cones ,genetic structures ,Color shift ,050105 experimental psychology ,Contrast Sensitivity ,03 medical and health sciences ,0302 clinical medicine ,Chromatic induction ,Optics ,Psychophysics ,Humans ,0501 psychology and cognitive sciences ,Chromatic scale ,Chromaticity ,Physics ,business.industry ,05 social sciences ,Sensory Systems ,Ophthalmology ,Pattern Recognition, Visual ,Retinal Cone Photoreceptor Cells ,Simultaneous contrast ,Color appearance ,Chromatic assimilation ,business ,Biological system ,Color Perception ,Photic Stimulation ,030217 neurology & neurosurgery - Abstract
Inducing patterns that selectively stimulate the S cones can induce large shifts in color appearance. For example, a “peach” test-ring presented within contiguous purple and non-contiguous lime inducing rings appears pink while the physically identical peach test-ring appears orange when presented within contiguous lime and non-contiguous purple inducing rings (Fig. 1c). These shifts have been accounted for by a neural substrate which predicts that chromatic assimilation and simultaneous contrast can operate synergistically to produce large shifts with these patterns [Monnier, P., & Shevell, S. K. (2004). Chromatic induction from S-cone patterns. Vision Research , 44 , 849–856]. Here, induction was measured for test-rings that stimulated the S cones either more or less than did the inducing rings. According to standard definitions of induction, color shifts for test s -chromaticities either lower or higher than both inducing chromaticities should be attenuated compared to test-rings of intermediate S-cone stimulation. On the other hand, a previously proposed model of induction predicted independence of the color shifts with test-ring s -chromaticity. Consistent with standard definitions of induction, a reduction in the magnitude of the color shifts for test-ring chromaticities either lower or higher in S-cone excitation than the inducing chromaticities was observed. Additional measurements with patterns that have been shown to isolate assimilation and simultaneous contrast were conducted. For these patterns, expectations based on standard definitions of induction suggested that the magnitude of the color shifts should be monotonic with the S-cone stimulation of the test-ring, and the direction of the color shift should reverse for test-ring chromaticities either lower or higher than both inducing chromaticities compared to test-rings of intermediate chromaticity. In contrast, the previously proposed model of induction based on a receptive-field with S-cone spatial antagonism predicted the color shifts should be independent of the test-ring chromaticity (Monnier & Shevell, 2004). Color shifts were generally independent of the level of the test-ring chromaticity, supporting the S-cone antagonistic model of induction.
- Published
- 2008
- Full Text
- View/download PDF
6. Color shifts from S-cone patterned backgrounds: contrast sensitivity and spatial frequency selectivity
- Author
-
Patrick Monnier and Steven K. Shevell
- Subjects
Physics ,genetic structures ,Color vision ,business.industry ,media_common.quotation_subject ,Color shift ,Sensory Systems ,Spatial frequency selectivity ,Contrast Sensitivity ,Ophthalmology ,Chromatic induction ,Optics ,Pattern Recognition, Visual ,Receptive field ,Psychophysics ,Retinal Cone Photoreceptor Cells ,Humans ,Contrast (vision) ,sense organs ,Sensitivity (control systems) ,Spatial frequency ,business ,Color Perception ,media_common - Abstract
Patterned backgrounds that selectively stimulate the S-cones cause conspicuous color shifts. These shifts are accounted for by an S-cone antagonistic (+S/-S) center-surround receptive field [Monnier, P., & Shevell, S. K. (2004). Chromatic induction from S-cone patterns. Vision Research, 44, 849-856]. The present study tested two additional implications of the S-cone receptive field for color shifts: (1) proportionality of the shifts with respect to S-cone contrast within the inducing pattern and (2) bandpass selectivity of the shifts with respect to the spatial frequency of the inducing pattern. Measurements showed that the magnitude of the color shift was linear with S-cone contrast and that the largest color shift was observed with inducing patterns at an intermediate spatial frequency. These results further support an S-cone spatially antagonistic receptive field as the neural substrate mediating the large color shifts from S-cone patterns.
- Published
- 2005
- Full Text
- View/download PDF
7. Influence of motion on chromatic detection
- Author
-
Patrick Monnier and Steven K. Shevell
- Subjects
Male ,Physics ,Communication ,Sequence ,Physiology ,business.industry ,Motion Perception ,Motion (geometry) ,Spatial integration ,Sensory Systems ,Fixation point ,Optics ,Sensory Thresholds ,Sensory threshold ,Path (graph theory) ,Humans ,Motion perception ,Chromatic scale ,business ,Color Perception ,Lighting ,Photic Stimulation - Abstract
Intense scrutiny has been focused on whether chromatic stimuli contribute to motion perception. The present study considers a related but different question: how does motion affect chromatic detection? Detection thresholds were measured for a disk that underwent a brief (13.3 ms) chromatic change in the L/(L+M) chromatic direction. The disk's presentation sequence and speed (0–16 deg/s) were manipulated. In the coherent presentation sequence, the disk moved smoothly along a circular path centered on the fixation point. In the random presentation sequence, the disk appeared randomly at positions along the circular path. In both types of sequences, the disk underwent a brief chromatic change midway through the temporal presentation sequence. Threshold was elevated in the coherent condition compared to the random condition, and threshold decreased with an increase in speed. The threshold elevation observed in the coherent presentation sequence can be accounted for by temporal integration. The decrease in threshold with an increase in speed can be accounted for by spatial integration. The results, therefore, can be explained by spatiotemporal integration, without invoking a neural mechanism specialized for motion.
- Published
- 2004
- Full Text
- View/download PDF
8. Redundant coding assessed in a visual search task
- Author
-
Patrick Monnier
- Subjects
Visual search ,Visual perception ,Computer science ,business.industry ,Color vision ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,Response time ,Human-Computer Interaction ,Hardware and Architecture ,Computer vision ,Artificial intelligence ,Chromatic scale ,Electrical and Electronic Engineering ,Chromaticity ,business ,Coding (social sciences) - Abstract
Potential advantages for redundantly coded target elements were assessed using a latency visual search task. Search times for targets that differed from distractors in both color and orientation, color only, or orientation only were compared. The comparisons were performed at six levels of chromatic difference between the target and distractors and at two different levels of orientation discriminability. The results show redundant coding generally did not result in significantly faster search times compared to the other two conditions. Instead, response time for the redundant target was in large part determined by the most discriminable feature; orientation at low levels of chromatic difference and color at high levels of chromatic difference.
- Published
- 2003
- Full Text
- View/download PDF
9. Set-size and chromatic uncertainty in an accuracy visual search task
- Author
-
Patrick Monnier and Allen L. Nagy
- Subjects
Visual search ,Adult ,Male ,Signal Detection, Psychological ,Psychometrics ,business.industry ,media_common.quotation_subject ,Pattern recognition ,Stimulus (physiology) ,Sensory Systems ,Ophthalmology ,Optics ,Perception ,Sample Size ,Visual Perception ,Visual attention ,Humans ,Attention ,Chromatic scale ,Artificial intelligence ,Chromaticity ,business ,Psychology ,Color Perception ,media_common - Abstract
Thresholds for chromatic differences were measured in a simple visual search task in which the target differed from the distractors in chromaticity only. In Experiment 1, the spatial separation between stimulus elements was varied. Slopes of threshold versus set-size (2–16) for elements in close proximity were somewhat elevated, suggesting non-independence of the stimulus elements. In Experiment 2, chromatic uncertainty was introduced to increase the attentional load beyond that accomplished with the set-size manipulation. The results were accounted for by a model assuming no limit in attention capacity. Furthermore, chromatic uncertainty was successfully modeled as a simple increase in the number of monitored signals.
- Published
- 2001
- Full Text
- View/download PDF
10. Jésus ressuscité, le prophète plus grand que Moïse. Lecture de Jn 21,1-14
- Author
-
Patrick Monnier
- Abstract
Jn 21 ne manque pas de surprendre. Considere comme un ajout tardif de l’Evangile, son apport a la revelation christologique johannique est decisif. Ses 14 premiers versets se presentent comme une scene de reconnaissance, reconnaissance intradiegetique qui en appelle une autre, extradiegetique, de la part du lecteur. En regard de la promesse d’un prophete semblable a Moise en Dt 18,18, dans une lecture globale de l’ensemble du 4e evangile, Jn 21,1-14 invite a reconnaitre en Jesus le prophete plus grand que Moise.
- Published
- 2017
- Full Text
- View/download PDF
11. Color heterogeneity in visual search
- Author
-
Patrick Monnier
- Subjects
Visual search ,business.industry ,General Chemical Engineering ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,Human Factors and Ergonomics ,General Chemistry ,Color space ,Task (project management) ,Homogeneous ,Computer vision ,Generalizability theory ,Artificial intelligence ,business ,Psychology - Abstract
Distractor color heterogeneity refers to a condition in which a target is presented among distractors of different chromaticities. In the present study, the amount distractor color heterogeneity was varied systematically to determine how efficiently the visual system processes displays composed of search elements of multiple colors. Distractor color heterogeneity was expressed by selecting distractor chromaticities from sectors of various angles in a cone-based normalized color space. The generalizability of the measurements was tested using two different visual search paradigms. An accuracy search task was used in which the search displays were presented as brief flashes and the dependent variable was search accuracy. A latency search task was used in which the display presentation time was under the participant's control and the dependent variable was reaction time. Compared to a homogeneous condition with distractors of a single color, distractor color heterogeneity had a deleterious effect on search performance in both paradigms. In normalized units, the measurements were similar across participants, target chromaticities, and tasks, but the same measurements expressed in non-normalized units showed clear and systematic individual differences. © 2010 Wiley Periodicals, Inc. Col Res Appl, 2011
- Published
- 2010
- Full Text
- View/download PDF
12. Detection of multidimensional targets in visual search
- Author
-
Patrick Monnier
- Subjects
Probability summation ,Adult ,Multidimensional target ,Light ,Computer science ,Models, Neurological ,Summation ,Stimulus (physiology) ,Luminance ,law.invention ,Optics ,law ,Orientation ,Psychophysics ,Humans ,Attention ,Chromaticity ,Probability ,Visual search ,Quantitative Biology::Neurons and Cognition ,business.industry ,Pattern recognition ,Sensory Systems ,Redundant coding ,Ophthalmology ,Pattern Recognition, Visual ,Achromatic lens ,Sensory Thresholds ,Visual Perception ,Artificial intelligence ,Spatial frequency ,business ,Color Perception ,Photic Stimulation ,Coding (social sciences) - Abstract
Search performance for targets defined along multiple dimensions was investigated with an accuracy visual search task. Initially, threshold was measured for targets that differed from homogeneous distractors along a single dimension (e.g., a reddish target among achromatic distractors, or a right-tilted target among vertically oriented distractors). Threshold was then measured for a multidimensional target (a redundant target) that differed from homogeneous distractors along two dimensions (e.g., a reddish AND right-tilted target among achromatic, vertically oriented distractors). Search performance for multidimensional target combinations of chromaticity and luminance, chromaticity and orientation, and chromaticity and spatial frequency was tested. Measurements were evaluated within several summation models, allowing for a test of the mechanisms mediating the detection of multidimensional targets in search. Measurements were generally consistent with probability summation suggesting the particular combinations of stimulus dimensions tested were coded along independent, noisy, neural mechanisms.
- Published
- 2006
13. Pasteurella multocida Endocarditis: Report of a Case and Review of the Literature
- Author
-
Antoine de Torrenté, Monica Nobel, Daniel Genne, Hans H. Siegrist, Humair L, and Patrick Monnier
- Subjects
Adult ,Microbiology (medical) ,Aortic valve ,medicine.medical_specialty ,Pasteurella multocida ,animal diseases ,Pasteurella Infections ,otorhinolaryngologic diseases ,Humans ,Medicine ,Endocarditis ,Disease entity ,General Immunology and Microbiology ,biology ,business.industry ,General surgery ,Aortic valve endocarditis ,Cirrhotic patient ,Endocarditis, Bacterial ,General Medicine ,respiratory system ,medicine.disease ,biology.organism_classification ,Surgery ,Infectious Diseases ,medicine.anatomical_structure ,Endocardial disease ,Female ,business ,Pasteurellosis - Abstract
We report on a cirrhotic patient who presented with an aortic valve endocarditis due to Pasteurella multocida. This disease entity is rare and we take this opportunity to review the 6 cases published to date.
- Published
- 1996
- Full Text
- View/download PDF
14. Chromatic induction from S-cone patterns
- Author
-
Steven K. Shevell and Patrick Monnier
- Subjects
genetic structures ,media_common.quotation_subject ,Receptive-field organization ,Short-wavelength-sensitive (S) cones ,Chromatic induction ,Optics ,Computer Science::Discrete Mathematics ,Contrast (vision) ,Humans ,Chromatic scale ,Chromaticity ,media_common ,Physics ,Mathematics::Combinatorics ,business.industry ,Optical Illusions ,Cone (category theory) ,Sensory Systems ,Chromatic contrast ,Ophthalmology ,Pattern Recognition, Visual ,Receptive field ,Retinal Cone Photoreceptor Cells ,Chromatic assimilation ,Background light ,business ,Color Perception ,Photic Stimulation - Abstract
Chromatic induction from patterned backgrounds depends on the spatial as well as the chromatic aspects of the background light. Color appearance with patterned and uniform backgrounds was compared using chromaticities distinguished by only the S cones; all backgrounds were equivalent to equal-energy white in terms of L-cone and M-cone stimulation. The measurements showed larger shifts in color appearance with a patterned chromatic background than with a uniform background at any chromaticity within the pattern. The measurements also showed that inducing light within different spatial regions could cause opposite shifts in color appearance: inducing light near a test field shifted appearance toward the inducing chromaticity (assimilation), while the same light some distance from the test shifted appearance away from the inducing chromaticity (simultaneous contrast). The shifts in color appearance were accounted for by a neural receptive field with S-cone spatial antagonism.
- Published
- 2004
15. Uncertainty, attentional capacity and chromatic mechanisms in visual search
- Author
-
Patrick Monnier and Allen L. Nagy
- Subjects
Adult ,Male ,media_common.quotation_subject ,Color ,Discrimination, Psychological ,Chromatic mechanisms ,Memory ,Perception ,Reaction Time ,Humans ,Attention ,Chromatic scale ,media_common ,Visual search ,Communication ,Analysis of Variance ,business.industry ,Mechanism (biology) ,Search ,Uncertainty ,Regression analysis ,Pattern recognition ,Cognition ,Sensory Systems ,Ophthalmology ,Capacity limit ,Regression Analysis ,Artificial intelligence ,Constant (mathematics) ,business ,Psychology ,Color Perception - Abstract
Two general questions were investigated using a visual search task. First, we asked whether effects of target uncertainty on reaction time varied with the discriminability of the target and distractors. Second, a higher order chromatic mechanism model was tested against a flexible model in which the signals in cardinal color-opponent mechanisms are combined through an attentional process. The models were tested by measuring the effects of target uncertainty on search time. A regression analysis indicated that the magnitude of the uncertainty effect was approximately constant in logarithmic units as a function of the chromatic difference between the target and distractors. The constant magnitude of the uncertainty effect suggested that an attentional capacity limit was exceeded when observers were required to monitor several chromatic mechanisms at several locations. The results of experiments 3 and 4 suggested that search for chromatic targets among distractors was mediated by diagonally tuned higher order chromatic mechanisms, rather than by signals in cardinal color-opponent mechanisms that were combined through an attentional mechanism.
- Published
- 2001
16. Predicting color breakup on field-sequential displays
- Author
-
Christopher S. Calhoun, Patrick Monnier, and David L. Post
- Subjects
Active shutter 3D system ,Stimulus luminance ,Computer science ,business.industry ,RGB color model ,Computer vision ,Spatial frequency ,Artificial intelligence ,Optical filter ,Breakup ,business ,Display device - Abstract
The quest for color head- and helmet-mounted displays has led some designers to consider the use of field-sequential color (FSC) because it offers higher resolution than conventional color displays in a compact package. Unfortunately, FSC displays exhibit color breakup sometimes, and the viewing conditions under which this occurs have not been established very well. We performed an experiment to determine color-breakup thresholds for a simple FSC stimulus as a function of stimulus luminance, contrast, and retinal velocity. We developed equations that describe the results and can be used to predict whether color breakup will be visible for specified viewing conditions.
- Published
- 1997
- Full Text
- View/download PDF
17. Large shifts in color appearance from patterned chromatic backgrounds
- Author
-
Patrick Monnier and Steven K. Shevell
- Subjects
Neurons ,genetic structures ,Optical Illusions ,business.industry ,General Neuroscience ,Retinal ,Biology ,Models, Biological ,chemistry.chemical_compound ,Optics ,Chromatic induction ,chemistry ,Retinal Cone Photoreceptor Cells ,Humans ,Chromatic scale ,Chromaticity ,business ,Neuroscience ,Color Perception ,Visual Cortex - Abstract
The perceived color of a light varies with the background on which it is seen. In the present study, patterned backgrounds composed of two different chromaticities caused larger shifts in perceived color than did a uniform background at either chromaticity within the pattern. Cortical receptive-field organization, but not optical factors or known retinal neurons, can account for the color shifts from patterned backgrounds.
- Published
- 2003
- Full Text
- View/download PDF
18. Searching for variegated elements
- Author
-
Patrick Monnier and Jenni Gustafson
- Subjects
Visual search ,business.industry ,media_common.quotation_subject ,Differential Threshold ,Pattern recognition ,Color space ,Sensory Systems ,Contrast Sensitivity ,Ophthalmology ,Noise ,Variegation (histology) ,Psychophysics ,Humans ,Contrast (vision) ,Chromatic scale ,Artificial intelligence ,Chromaticity ,business ,Color Perception ,Photic Stimulation ,Independence (probability theory) ,Mathematics ,media_common - Abstract
Visual search performance was investigated for variegated elements that differed from each other either in space-average chromaticity (identical chromatic contrast; Experiment 1) or in the chromatic contrast of the variegation (identical space-average chromaticity; Experiment 2). Specifically, search performance was measured as a function of noise contrast articulated either along the same color direction or orthogonally from the signal (target) variegation. Target-to-distractor difference thresholds were estimated in a two-alternative forced-choice task with briefly presented displays. First, when the signal and noise variegations were articulated along the same direction in color space, elements that differed from each other in space-average chromaticity were less susceptible to noise compared to elements that differed in the contrast of the variegation. Second, orthogonal noise had little effect on threshold supporting independence between the mechanisms mediating these searches. Third, the effect of the noise was similar across the different chromatic directions as well as between observers (but still differed for the two types of variegation) when differences in sensitivity between the various color directions and between observers were taken into account. This last statement only holds because the color space was normalized for each participant.
- Published
- 2011
- Full Text
- View/download PDF
19. Comparison of results of intravenous infusion of anistreplase versus streptokinase in acute myocardial infarction
- Author
-
Fedor Bachmann, Ulrich Sigwart, Axel Essinger, Jean-J. Goy, Lukas Kappenberger, Marie-D. Schaller, Pierre Vogt, Philippe Beuret, Patrick Monnier, Claude Perret, and Jacques Hauert
- Subjects
Adult ,Male ,medicine.medical_specialty ,Time Factors ,medicine.drug_class ,medicine.medical_treatment ,Streptokinase ,Myocardial Infarction ,Coronary Angiography ,Electrocardiography ,Bolus (medicine) ,Internal medicine ,Fibrinolysis ,medicine ,Humans ,Thrombolytic Therapy ,Myocardial infarction ,Infusions, Intravenous ,Aged ,Chi-Square Distribution ,business.industry ,Anistreplase ,Anticoagulant ,Thrombolysis ,Middle Aged ,medicine.disease ,Anesthesia ,Cardiology ,Myocardial infarction complications ,Regression Analysis ,Female ,Cardiology and Cardiovascular Medicine ,business ,medicine.drug - Abstract
This randomized study compares the coronary perfusion rate in patients with acute myocardial infarction (AMI) treated with 2 different intravenous thrombolytic agents: streptokinase 1.5 million U given over 60 minutes and anisoylated human plasminogen streptokinase activator complex (anistreplase) administrated as a bolus of 30 U over 5 minutes. One hundred seventy-five patients (149 men and 26 women, mean age 54 years) have been included in this study. Eighty-nine patients were treated with anistreplase and 86 patients with streptokinase. AMI was inferior in 54 patients (61%) in the anistreplase group and in 54 patients (63%) in the streptokinase group. It was anterior in 35 (40%) and 32 (37%) patients, respectively. Coronary angiography and ventriculography were performed at a mean time (+/- SEM) of 207 +/- 11 minutes after the beginning of thrombolysis in 170 patients. A perfusion score grade of 2 or 3 according to the Thrombolysis in Myocardial Infarction trial was found in 63 patients (72%) in the anistreplase group and in 56 patients (68%) in the streptokinase group (p = NS). Severe bleeding occurred in 7 patients (8%) after anistreplase and in 6 patients (7%) after streptokinase. No cerebral hemorrhage occurred. Nine patients (5%) died during their hospital stay: 6 after anistreplase and 3 after streptokinase. It is concluded that intravenous administration of anistreplase or streptokinase is efficient and safe. Coronary patency 207 minutes after fibrinolysis, incidence of adverse events and mortality are similar in both groups.
- Published
- 1993
20. Estimating the properties of the chromatic mechanisms mediating the processing of large color differences
- Author
-
Ryann McGough, Joshua Edler, and Patrick Monnier
- Subjects
Ophthalmology ,Computer science ,Chromatic scale ,Biological system ,Sensory Systems - Published
- 2010
- Full Text
- View/download PDF
21. Changes in the space-average S-cone stimulation of inducing patterns suggest an interaction among the different cone-types
- Author
-
Patrick Monnier and Vicki J. Volbrecht
- Subjects
Physics ,Ophthalmology ,Cone (topology) ,Stimulation ,Geometry ,Space (mathematics) ,Sensory Systems - Published
- 2010
- Full Text
- View/download PDF
22. Searching for vasiegated elements
- Author
-
Patrick Monnier
- Subjects
Ophthalmology ,Sensory Systems - Published
- 2010
- Full Text
- View/download PDF
23. The bandwidth of chromatic mechanisms mediating visual search
- Author
-
Patrick Monnier
- Subjects
Visual search ,Ophthalmology ,Computer science ,Bandwidth (signal processing) ,Electronic engineering ,Chromatic scale ,Sensory Systems - Published
- 2010
- Full Text
- View/download PDF
24. Configural asymmetries in visual search are robust to changes in the spatial arrangement of the search elements
- Author
-
Patrick Monnier and Joshua Edler
- Subjects
Visual search ,Ophthalmology ,Computer science ,business.industry ,Pattern recognition ,Artificial intelligence ,business ,Sensory Systems - Published
- 2010
- Full Text
- View/download PDF
25. Color shifts from patterned backgrounds: Spatial frequency selectivity and contrast sensitivity
- Author
-
Patrick Monnier and Steven K. Shevell
- Subjects
Ophthalmology ,Nuclear magnetic resonance ,Materials science ,media_common.quotation_subject ,Contrast (vision) ,Sensitivity (control systems) ,Sensory Systems ,Spatial frequency selectivity ,media_common - Published
- 2010
- Full Text
- View/download PDF
26. Classical definitions of chromatic induction are inadequate for induction with S-cone patterned backgrounds
- Author
-
Lucy J. Troup and Patrick Monnier
- Subjects
Physics ,Ophthalmology ,Optics ,Chromatic induction ,business.industry ,business ,Cone (formal languages) ,Sensory Systems - Published
- 2010
- Full Text
- View/download PDF
27. Induction from patterned S-cone backgrounds: Receptoral or postreceptoral basis?
- Author
-
Patrick Monnier and Steven K. Shevell
- Subjects
Physics ,Ophthalmology ,Optics ,Basis (linear algebra) ,business.industry ,business ,Cone (formal languages) ,Sensory Systems - Published
- 2010
- Full Text
- View/download PDF
28. Induction from a below-threshold chromatic pattern
- Author
-
Steven K. Shevell and Patrick Monnier
- Subjects
Physics ,genetic structures ,business.industry ,Color vision ,media_common.quotation_subject ,Color shift ,Article ,Sensory Systems ,Contrast Sensitivity ,Ophthalmology ,Discrimination, Psychological ,Optics ,Pattern Recognition, Visual ,Homogeneous ,Sensory Thresholds ,Sensory threshold ,Retinal Cone Photoreceptor Cells ,Humans ,Contrast (vision) ,Chromatic scale ,business ,Color Perception ,Photic Stimulation ,media_common - Abstract
Patterned backgrounds can induce large shifts in color appearance, even with patterns of only 10% S-cone contrast (S. K. Shevell & P. Monnier, 2005). The present study tested whether a background pattern could induce color shifts even at a below-threshold contrast. In the first experiment, S-cone contrast threshold for discriminating a pattern from a homogenous background was measured by a 2AFC procedure. Next, a test ring was inserted within the patterned background. With the test ring present, six of eight observers reliably distinguished trials with a patterned background from trials with a homogeneous field, even though the S-cone contrast in the pattern was too low to be discriminated from a homogeneous background. This suggested that a below-threshold S-cone pattern shifted the color appearance of the test ring; that is, the appearance of the test was used to discriminate whether the background was patterned or homogeneous. This was corroborated by asymmetric color matches, which revealed a color shift caused by subthreshold S-cone contrast within the patterned background.
- Published
- 2008
- Full Text
- View/download PDF
29. Induction from a chromatic pattern that cannot be seen
- Author
-
Erica J. Young, Patrick Monnier, and Steven K. Shevell
- Subjects
Ophthalmology ,Chromatic scale ,Sensory Systems - Published
- 2005
- Full Text
- View/download PDF
30. The disciminability of a target defined along multiple dimensions can be accounted for by probability summation
- Author
-
Patrick Monnier
- Subjects
Ophthalmology ,Multiple time dimensions ,Probability summation ,Mathematical analysis ,Sensory Systems ,Mathematics - Published
- 2004
- Full Text
- View/download PDF
31. s=S/(L+M) color shifts modulated by l=L/(L+M) contrast within patterned backgrounds
- Author
-
Patrick Monnier and Steven K. Shevell
- Subjects
Physics ,Ophthalmology ,Nuclear magnetic resonance ,media_common.quotation_subject ,Contrast (vision) ,Sensory Systems ,media_common - Published
- 2002
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.