应用于矿井LED电子显示牌的点阵式绘图软件设计

针对矿井LED电子显示牌采用矢量图技术绘图存在的图形绘制不精确、可视性差等问题,提出一种可应用于不同型号电子显示牌的点阵式绘图软件设计方案,介绍了该软件的总体设计及BMP图像的灰度化步骤。点阵式绘图软件基于组件的设计理念,实现了所见即所得的绘图功能、文字点阵转换功能、BMP图片导入/转换功能、ICO图标导入/导出功能、模拟显示功能及对外通用接口功能。比较发现,采用点阵式绘图软件绘制的原始图形及实际显示效果均明显好于采用矢量图技术绘制的图形。     

The Effectiveness of Antibrowning Dip Treatments to Reduce After‐Cooking Darkening in Potatoes

Abstract: After‐cooking darkening (ACD) is an inherent and undesirable trait that develops in cooked potatoes. The objective of this study was to evaluate the effectiveness of sodium acid sulfate (SAS) dip treatments compared to other antigraying treatments and a control to reduce ACD in boiled, Katahdin potatoes. Dip treatments were applied for 3 min prior to boiling and included: 3% SAS, 3% citric acid (CA), 3% sodium acid pyrophosphate (SAPP), along with a distilled water control. SAS‐ and CA‐treated potatoes had slightly, but significantly (P ≤ 0.05) higher b* and chroma values, which indicates a more intense yellow potato color, with less graying, compared to the control. SAS‐ and CA‐treated potatoes also had significantly (P≤ 0.001) lower pH values for inner and outer potato surfaces than the control. No significant (P > 0.05) differences were detected for total phenolic or mineral contents among treatments. CA and SAPP samples had slightly, but significantly (P≤ 0.05) higher moisture contents than the control. Sensory test results showed no significant differences for color, aftertaste, or overall acceptability. However, CA‐treated samples were rated significantly (P≤ 0.05) lower for flavor than all other treatments and panelists commented on sour notes. CA‐ and SAS‐treated potatoes were scored slightly, but significantly lower for texture than other treatments due to a waxy outer layer. However, SAS was the most acidic dip treatment, but did not significantly affect flavor. Overall, results suggest that SAS was similarly accepted by consumers in comparison to CA and SAPP, which is the industry standard to reduce ACD. Practical Application: After‐cooking darkening (ACD) is an undesirable potato trait that occurs after potatoes have been processed. Sodium acid pyrophosphate (SAPP) has been used as the industry standard to reduce ACD. Sodium acid sulfate (SAS) treatments prior to boiling appeared to be comparable to SAPP and citric acid in effectiveness to reduce ACD. SAS did not negatively affect the flavor of boiled potato samples according to sensory results. The SAS treatment may be more beneficial for potatoes intended for potato salad products.     

宾馆、酒店布草洗涤专用通用洗衣粉的技术进展

概述了国内宾馆、酒店布草洗涤专用通用洗衣粉的特征、应用及发展状况,对通用洗衣粉的技术进展做了详细说明,介绍了毛巾发灰的原因,指出了通用洗衣粉的不足和发展方向。     

一种基于视锥适应模型的真实影像再现方法

鉴于常见的色调再现算法或者参数过多,或者空间常数过大,使其工程应用受到限制,为此,提出了一种基于视锥细胞适应模型的影像再现算法。在该模型中,视锥细胞转换函数的半饱和常数随着输入强度的变化而变化,而半饱和常数与其色素半漂白常数的相对比例关系保持不变,以便符合色素漂白与神经反馈对视锥适应的相对作用关系。通过大量实验仿真,并与其他方法处理结果的比较发现,该模型具有以下特点:①能够有效突出图像亮区和暗区的细节,且动态范围压缩性能较好;②能够在很大程度上减弱色调再现领域经常出现的"光晕"效应;③能够避免retinex模型和对抗神经网络等模型带来的"白化"现象;④处理结果的色调偏离真实景物的程度较低,其颜色恒定性能较好;⑤在计算背景光强时由于所用模板尺寸很小,因而速度远远快于常见的算法。该方法有希望应用到实时性要求较高的工程领域。     

基于图像预处理和纹理特征的车牌定位算法

为了解决车牌定位过程中拍摄图像背景复杂,噪声大,检测准确率偏低的问题,提出简便有效抗干扰强的车牌定位算法.首先将彩色图像转换为灰度图像,其次设定灰度门限区分图像目标和背景,进行二值化处理,然后使用Sobel边缘检测算子计算图像梯度幅度值,检测图像边缘点,采用局部图像平滑技术中值滤波对图像去除干扰,最后根据车牌区域纹理信息较其它区域丰富的特征,采用投影法,通过水平和垂直方向上投影分布特征的反复提取,准确检测定位车牌.实验结果表明,该方法定位出的车牌区域图像清晰度和准确度较高.     

基于增强预处理的改进U-Net眼底视网膜血管分割研究

视网膜血管分割是眼底图像研究的基础,也是医学分析和诊断中一项重要而具有挑战性的任务.一方面,眼底图像在采集过程中光照不足或者曝光过度,往往导致视网膜血管的边界不清晰.另一方面,位于血管分支末端的微小血管,有时肉眼也无法分辨.针对这些问题,首先使用加权平均值法对眼底图像进行灰度化预处理,替代传统的提取绿色通道方式,使其保...     

位图图像灰度化的方法及编程实现

图像灰度化是许多数字图像处理的初始和基础工作,本文对灰度化的基本原理作了简要阐述,同时分别介绍了8位和24位彩色位图灰度化的具体方法,并给了实现详细代码。     

基于改进的Bernsen秸秆覆盖率图像处理算法研究

针对当前秸秆覆盖率自动识别准确率低的问题,提出了一种更加准确,适应性更强的秸秆覆盖率检测方法。 首先,基于 彩色分量空间距离灰度化算法对摄像头采集的秸秆图像进行目标背景分离;其次,再将彩色图像灰度化;最后,使用基于改进的 Bernsen 算法对图像进行二值化处理并计算秸秆覆盖率。 在实验中,选取了秸秆覆盖率区间在 20% ~ 30%、30% ~ 40%、40% ~ 50%、50% ~ 60%、60% ~ 70%、70% ~ 80%和 80% ~ 90%各 200 张图片,采用改进前和改进后的 Bernsen 算法分别计算秸秆覆盖率, 结果表明秸秆覆盖率为 30% ~ 80%时,采用改进后的 Bernsen 算法计算秸秆覆盖率更为准确,误差小于 5%,而在其他情况下,秸 秆覆盖率计算误差在 5% ~ 10%。     

基于自适应滑动窗口的漏磁数据灰度化增强方法

管道无损检测领域中传统的漏磁数据灰度可视化方法在缺陷曲线视图显示时具有延迟大、灰度视图辨识度低的缺点。针对该问题,本文提出了一种基于自适应滑动窗口的漏磁数据灰度化特征增强方法。首先,根据漏磁数据特点建立非等量分类标签并设置降采样比,实现对原始漏磁数据的降采样显示;然后,根据预处理后的漏磁数据设计自适应滑动窗口及灰度值补偿算法,实现漏磁数据的局部分段灰度映射;最后,基于漏磁数据分类标签设计自适应灰度映射方法,得到清晰的漏磁数据灰度视图。通过对比实验,验证了所提方法的先进性和有效性。