An innovative, cost-effective, user-friendly and portable device （dew sensor） to directly detect condensation on glass surfaces was developed within the EC-VIDRIO project （contract No. EVK4-CT-2001-00045）, aimed a...An innovative, cost-effective, user-friendly and portable device （dew sensor） to directly detect condensation on glass surfaces was developed within the EC-VIDRIO project （contract No. EVK4-CT-2001-00045）, aimed at finding sustainable solutions to preserve ancient stained glass windows. The results of the research showed that the direct survey of condensation with the new sensor is more accurate and reliable than the traditional indirect microclimatic measurements. Since the construction of the first prototype, the dew sensor was developed further, continuously improved, validated in the laboratory and applied successfully on different surfaces at sites of interest in the field of Cultural Heritage; on the stained glass windows in the Saint Urbain Basilica of Troyes （France）, Sainte Chapelle of Paris （France） and Cologne Cathedral （Germany）; on stone walls in Petrarca＇s Tomb （Padua, Italy） and the Hagar Qim Temple （Malta）. Now the sensor is being used in the Lascaux Caves （France）. The newly built device was patented （PTC/EP2005/050665） and gave such interesting results that the Italian Ministry of University and Research financially supported a spin-off project that has lead to the creation of a new company （R.E.D.s.r.l.） in order to develop the prototype further and to produce the sensor at industrial scale.展开更多
A new local cost function is proposed in this paper based on the linear relationship assumption between the values of the color components and the intensity component in each local image window,then a new quadratic ob...A new local cost function is proposed in this paper based on the linear relationship assumption between the values of the color components and the intensity component in each local image window,then a new quadratic objective function is derived from it and the globally optimal chrominance values can be computed by solving a sparse linear system of equations.Through the colorization experiments on various test images,it is confirmed that the colorized images obtained by our proposed method have more vivid colors and sharper boundaries than those obtained by the traditional method.The peak signal to noise ratio(PSNR) of the colorized images and the average estimation error of the chrominance values relative to the original images also show that our proposed method gives more precise estimation than the traditional method.展开更多
文摘An innovative, cost-effective, user-friendly and portable device （dew sensor） to directly detect condensation on glass surfaces was developed within the EC-VIDRIO project （contract No. EVK4-CT-2001-00045）, aimed at finding sustainable solutions to preserve ancient stained glass windows. The results of the research showed that the direct survey of condensation with the new sensor is more accurate and reliable than the traditional indirect microclimatic measurements. Since the construction of the first prototype, the dew sensor was developed further, continuously improved, validated in the laboratory and applied successfully on different surfaces at sites of interest in the field of Cultural Heritage; on the stained glass windows in the Saint Urbain Basilica of Troyes （France）, Sainte Chapelle of Paris （France） and Cologne Cathedral （Germany）; on stone walls in Petrarca＇s Tomb （Padua, Italy） and the Hagar Qim Temple （Malta）. Now the sensor is being used in the Lascaux Caves （France）. The newly built device was patented （PTC/EP2005/050665） and gave such interesting results that the Italian Ministry of University and Research financially supported a spin-off project that has lead to the creation of a new company （R.E.D.s.r.l.） in order to develop the prototype further and to produce the sensor at industrial scale.
基金Supported by the National Natural Science Foundation of China(No.61073089)the Joint Funds of the National Natural Science,Foundation of China(No.U1304616)the Qinhuangdao Research&Development Program of Science&Technology(No.2012021A044)
文摘A new local cost function is proposed in this paper based on the linear relationship assumption between the values of the color components and the intensity component in each local image window,then a new quadratic objective function is derived from it and the globally optimal chrominance values can be computed by solving a sparse linear system of equations.Through the colorization experiments on various test images,it is confirmed that the colorized images obtained by our proposed method have more vivid colors and sharper boundaries than those obtained by the traditional method.The peak signal to noise ratio(PSNR) of the colorized images and the average estimation error of the chrominance values relative to the original images also show that our proposed method gives more precise estimation than the traditional method.
