Developing a Machine Vision System Equipped with UV Light to Predict Fish Freshness Based on Fish-Surface Color

This study assessed the feasibility of developing a machine vision system equipped with ultraviolet (UV) light, using changes in fish-surface color to predict aerobic plate count (APC, a standard freshness indicator) during storage. The APC values were tested and images of the fish surface were taken when fish were stored at room temperature. Then, images’ color-space conversion among RGB, HSV, and L*a*b* color spaces was carried out and analyzed. The results revealed that a* and b* values from the UV-light image decreased linearly during storage. A further regression analysis of these two parameters with APC value demonstrated a good exponential relationship between the a* value and the APC value (R2 = 0.97), followed by the b* (R2 = 0.85). Therefore, our results suggest that the change in color of the fish surface under UV light can be used to assess fish freshness during storage.

Relationships between leaf color changes,pigment levels,enzyme activity,photosynthetic fluorescence characteristics and chloroplast ultrastructure of Liquidambar formosana Hance

Liquidambar formosana Hance is an attractive landscape tree species because its leaves gradually change from green to red,purple or orange in autumn.In this study,the red variety of L.formosana was used to establish a quantitative model of leaf color.Physiological changes in leaf color,pigment levels,enzyme activity,photosynthetic fluorescence characteristics and chloroplast ultrastructure were monitored.The relationship between leaf color and physiological structure indices was quantitatively analyzed to systematically explore the mechanisms behind leaf color.Our data showed that with a decrease in external temperatures,chloroplast numbers and sizes gradually decreased,thylakoid membranes became distorted,and chlorophyll synthesis was blocked and gradually decreased.As a result,chloroplast membranes could not be biosynthesized normally;net photosynthesis,maximum and actual photochemical efficiency,and rate of electron transfer decreased rapidly.Excess light energy caused leaf photoinhibition.With intensification of photoinhibition,leaves protected themselves using two mechanisms.In the first,anthocyanin synthesis was promoted by increasing chalcone isomerase and flavonoid glycosyltransferase activities and soluble sugar content so as to increase anthocyanin to filter light and eliminate reactive oxygen species to reduce photoinhibition.In the second,excessive light energy was consumed in the form of heat energy by increasing the non-photochemical quenching coefficient.These processes tuned the leaves red.

Non-perturbative Aspects of QCD and Parameterized Quark Propagator

基于全球颜色对称模特儿， non-perturbative QCD 真空充分在 parameterized 被调查处理夸克增殖者。我们 QCD 真空与那些一致的为描绘的各种各样的数量的理论预言由许多其它预言现象学的 QCD 鼓舞了模特儿。成功的预言清楚地显示我们这里使用的 parameterized 夸克增殖者的广泛的有效性。在强烈决定在精明的 QCD 真空冷凝物和一个好方法的 μ 的截止参数，它在截止参数上避免了精明的结果的依赖也是的集成的任意的详细讨论推荐了给读者。

QCD真空凝聚和参数化的夸克传播子

基于整体色对称模型,用完全穿衣服参数化的夸克传播子研究了量子色动力学(QCD)真空的性质,预言了各种表征QCD真空的凝聚值。其结果与其他唯象QCD理论模型的预言是一致的。结果清楚地表明了参数化的夸克传播子是成功和可靠的。讨论了计算QCD真空凝聚值时积分截断参数的问题,提出了一个避免计算的结果对截断参数强烈依赖的物理方法。

Walnut Meal Whitening and the Impact of Whitening Factors on Its Quality

Walnut meal is a nutrient-rich product and has a high nutritional value. Walnut meal is a product that can be used in food technology, in order to improve the nutritional quality, expand the range of confectionery products, and replaces the walnut kernel. Due to the dark color, the use of the walnut meal in the preparation of pastries would have a negative effect on the appearance of some final products and the whitening process would allow its use without negatively influencing the final product. The aim of the research is to whiten Juglans regial L. walnut meal as a valuable nutritious raw material. Hydrogen peroxide was used to bleach the walnut meal, and the pH, concentration of the whitening agent and the concentration of the meal were used as variable parameters of the bleaching process. The color descriptors (Whitening index, Saturation index, Total color difference, Browning index) were calculated to establish the optimal whitening conditions of the walnut meal. The obtained results showed that an alkaline medium, with the hydrogen peroxide concentration of 10% and 2.5% meal concentration allows obtaining the best color parameters in terms of Lightness (82.20) and Whitening Index (71.20). In addition, the study of walnut meal quality in terms of peroxide value evolution showed that the treatment with hydrogen peroxide does not affect in any way the value of the peroxide index of the lipids. The highest peroxide value (4.91 mmol/g oil) was recorded for the sample bleached in a 10% Hydrogen peroxide solution, with a pH of 10 against the 4.71 mmol/g oil for the unbleached sample.

COPLIP新模型及其图像增强新算法

针对现有对数模型在彩色图像领域的瓶颈问题,把带参数的对数模型扩展到彩色图像,提出一种带参数的彩色对数图像处理新模型,定义了新模型的彩色色调函数,加、数乘、取反运算和基本同态函数.为了验证其有效性,设计了基于新模型的图像增强新算法,色调函数的评价结果表明,新模型在图像增强上具有更好的效果,与人类的视觉模型更加匹配,能选取更多的参数来调整图像中感兴趣的部分.

散乱数据点云型面特征分析算法的研究与应用

提出一种产品散乱数据点云型面特征快速分析算法。该算法基于R*-tree动态空间存取模型,能快速、准确地获取点云局部型面参考数据,并采用最小面积包围矩形法对其进行参数化;以自由曲面逼近产品局部型面,估算数据点云型面曲率值;将点云型面曲率映射为RGB颜色值,以曲率云图反映产品型面特征分布。该算法运行效率高,产品数据适应性强,型面特征分析结果准确。

基于参数化的产品单一色彩设计方法

目的提出一种基于参数化的产品单一色彩设计方法,研究在单一色彩产品设计中造型—色彩的匹配规律、消费者的喜好规律,以及这两者之间的关系,从而实现对单色产品设计中造型—色彩的匹配度和受喜好程度的预测,以指导设计。方法首先,通过设计实验,对造型—单一色彩的匹配度、消费者的喜好程度进行量化、评分,利用SPSS和MATLAB软件,对实验数据进行统计分析和回归分析,得出相关研究规律,并且建立数学模型。之后,进行验证实验,并将验证实验的结果与上述研究方法的预测结果进行对比,计算其相对误差,从而验证研究方法及相关规律的有效性和可靠性。结论验证了实验结果与理论预测的结果基本一致。造型—色彩的匹配程度和受喜好程度基本呈现正相关关系。在适宜范围内的纯度、明度较高的色彩与造型的匹配度越高,就越受到消费者喜爱。研究方法和实验结果具有有效性、可靠性和可行性,可为单一色彩产品设计中色彩的选择和运用提供一种预测和指导方法,以供今后的设计参考和借鉴。

基于参数化高基乘法算法的颜色空间转换

文章介绍了YUV向RGB颜色空间转换的硬件电路实现算法。在高基乘法算法基础上,建立了参数化高基乘法算法模型,并给出了VerilogHDL描述;小数乘法的整数乘法近似和近似误差给予了详细的讨论。采用乘法单元复用的设计结果将在两个时钟周期内完成YUV向RGB的颜色空间转换。

彩色编码技术的研究进展及应用

作为一种重要的参数化技术,彩色编码技术得到了越来越多的重视并在近年来取得了理论和应用上的一系列进展。本文首先介绍了彩色编码技术的基本思想和相关定义,并详细论述了随机式和确定式两种彩色编码技术。最后本文具体介绍和分析了彩色编码技术在路径查找、子图同构、matching与packing、(t,n)-环签名等问题上的应用,并探讨了彩色编码技术及其应用的进一步研究工作。

大学校园主色调提取方法研究——以上海华东理工大学奉贤校区为例

色彩是刺激视觉并作用于头脑的重要形象要素,大学作为城市中独特的文化场所,对其进行色彩规划具有一定的意义。本研究借助无人机、相机及问卷调查获取建筑主色调现状和调控数据,再通过Python和MATLAB进行参数化设计,辅以Photoshop进行图像处理,最终得到华东理工大学奉贤校区的主色调现状及理想化控制方案。利用数字化技术可以更科学地得到大学校园的主色调及理想化调控方案,为未来校园的规划设计提供可操作性的手段。

基于参数化模板技术的电子地图设计

提出了基于参数化模板技术的电子地图设计方法,该方法结合参数化模板技术,通过用户配置和修改模板,实现电子地图的快速高质量设计。将参数化模板技术引入到电子地图设计中,详细介绍了参数化模板技术在电子地图设计中的应用,并以此开发了一个电子地图设计系统,在实践中进行了应用。

Soil texture prediction through stratification of a regional soil spectral library

Knowing the spatial distribution of soil texture,which is a physical property,is essential to support agricultural and environmental decision making.Soil texture can be estimated using visible,near infrared,and shortwave infrared(Vis-NIR-SWIR)spectroscopy.However,the performance of spectroscopic models is variable because of soil heterogeneity.Currently,few studies address the effects of soil sample variability on the performance of the models,especially for larger spectral libraries that include soils that are more heterogeneous.Therefore,the objectives of this study were to:i)apply Vis-based color parameters on the stratification of a regional soil spectral library;ii)evaluate the performance of the predictive models generated from the spectral library stratification;iii)compare the performance of stratified models(SMs)and the model without stratification(WSM),and iv)explain possible changes in prediction accuracy based on the SMs.Thus,a regional soil spectral library with 1535 samples from the State of Santa Catarina,Brazil was used.Soil reflectance data were obtained by Vis-NIR-SWIR spectroscopy in the laboratory using a spectroradiometer covering the 350–2500 nm spectral range.Sand,silt,and clay fractions were determined using the pipette method.Twenty-two components of color parameters were derived from the Vis spectrum using the colorimetric models.A cubist regression algorithm was used to assess the accuracy of the applicability of the initial models(SMs and WSM)and of the validation between the clusters.Fractional order derivatives(FODs)at 0.5,1.5,and 2 intervals were used to explain possible changes in the performance of the SMs.The SMs with higher contents of clay and iron oxides obtained the highest accuracy,and the most important spectral bands were identified,mainly in the 480–550 and 850–900 nm ranges and the 1400,1900,and 2200 nm bands.Therefore,stratification of soil spectral libraries is a good strategy to improve regional assessments of soil resources,reducing prediction errors in the qualitative determination of soil properties.

南通彩锦绣“点彩纳锦”的参数化构建与应用

围绕江苏民间非物质文化遗产南通彩锦绣的主要针法“点彩纳锦”进行分析与研究。彩锦绣是苏绣艺术形式之一,以点彩、纳锦针法绣制,其难度在于绣地不同,造型也会受到制约,不易于操作。通过参数化技术,可以降低刺绣难度,提高设计效率,形成有效的格式,“点彩纳锦”在参数化的基础上将得到继承与发扬,造福于地方经济,也能更好地运用到一系列衍生品上,发扬“以新意运规法”的创新精神。