Search results for "Appearance models"

showing 3 items of 3 documents

Indoor lighting quality: Effects of different wall colours

2016

This paper reports the results of measurements performed in a test room to investigate the impact of using different wall colours and light scenes on indoor lighting quality. Eye level spectral irradiances were measured for a user located inside the room and seated at a desk. These measurements allow the use of the Irradiance Toolbox, which makes it possible to calculate equivalent illuminances for the photopigments in the human eye. Moreover, the CIECAM02 colour appearance model was used to investigate the variations in hue and chroma values of the different wall colours when changing the light scene. The results demonstrate that there are significant variations in eye level spectral irra…

Settore ING-IND/11 - Fisica Tecnica Ambientalebusiness.industryComputer science0211 other engineering and technologiesIrradianceCIECAM0202 engineering and technology03 medical and health sciences0302 clinical medicineOpticsQuality (physics)021105 building & constructionTest roomElectrical and Electronic EngineeringbusinessIndoor lighting CIECAM02 Colour appearance models Photopigments Spectral irradianceNon visual effects of light colour perception030217 neurology & neurosurgery
researchProduct

Pedestrian Tracking in 360 Video by Virtual PTZ Cameras

2018

Since the data acquired by a PTZ camera change while adjusting the pan, tilt and zoom parameters, the results of tracking algorithms are difficult to reproduce; such diffi- culty limits the development and the comparison of tracking algorithms with PTZ cameras. The recently introduced 360- degree cameras acquire spherical views of the environment, generally stored as equirectangular images. Each pixel of an equirectangular image corresponds to a point on the spherical surface. A gnomonic projection can be used to project the points on the spherical surface onto a plane tangent to the sphere. Such tangent plane can be interpreted as the image plane of a virtual PTZ camera oriented towards th…

Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniPixelComputer sciencebusiness.industryComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISIONImage planeTracking (particle physics)Gnomonic projectionAppearance models Dynamic memory Pedestrian tracking Spherical surface Tracking algorithm Tracking by detections Virtual cameraComputer Science::Computer Vision and Pattern RecognitionEquirectangular projectionComputer visionDevelopment (differential geometry)Artificial intelligenceZoombusinessTilt (camera)2018 IEEE 4th International Forum on Research and Technology for Society and Industry (RTSI)
researchProduct

Analyzing the metrics of the perceptual space in a new multistage physiological colour vision model

2009

In this work, the metric of a new multistage colour vision model, ATTD05, is assessed and a new colour difference formula is suggested. Firstly, the uniformity of the ATTD05 colour space was compared with that of CIECAM02 for some Munsell samples, because if the model yields a uniform perceptual space, we will be able to implement a colour difference formula as a Euclidian distance between two points. Secondly, we developed a new space based on the perceptual descriptors of the model: brightness, hue, colourfulness, and saturation. After that, we calculated the free parameters of the space that better fit the measured and experimental data of two datasets (small-magnitude and large-magnitud…

business.industryComputer scienceGeneral Chemical Engineeringmedia_common.quotation_subjectColour VisionNeural modelHuman Factors and ErgonomicsUniform colour spaceGeneral ChemistrySpace (commercial competition)Color appearance modelsColor difference metricsPerceptionChristian ministryComputer visionArtificial intelligencebusinessmedia_commonÓptica
researchProduct