Based on buoyance and force of gravity principle , the practical and economical test measure of overflowing water has been made 摘要依据浮力和重力的原理，制作了实用经济的池外测试标尺，提高了读数的精确度。
Image processing for coded level ruler of digital levels is the critical technology to realize the automatic reading of digital levels 摘要数字水准仪编码水准尺的图像处理是实现数字水准仪自动读数的关键技术。
Switched range analogue multimeters are very cheap but are difficult for beginners to read accurately , especially on resistance scales 量程转换型指针万用表是非常便宜的，但是对于新手使用者来说除了电阻档以外，都是很难读数的。
Thermometers with digital readouts and those that take the temperature quickly from the ear canal are especially useful for young children and older adults 带数字读数的温度计和能从耳道迅速取得温度的温度计对于小孩或者老人来说特别有用。
Instruments used in today ' s electronic industry consist of various types of voltmeters with accuracies form 5 percent of full scale to nearly 0 . 002 percent of reading 当今在电子业使用的测量仪器包括各种各样的电压表，精度从满刻度盘的5 %到接近读数的0 . 002 % 。
According to the measuring appliance geometry characteristic and the relative position between reading - pointers and the calibration red pointers examine the effective pointers ’ central position 根据仪表的几何特征和用于读数的指针和定标红色指针的相对位置,检测出有效指针的中心位置。
Secondly , image recognition . in view of the active power meter reading concrete character , different recognition algorithm is adopted to the complete character , the incomplete character and the scale division 第二,图像识别:针对电度表读数的特点,对完整字符、不完整字符和刻度采用了不同的识别算法。
The measured result of pylon ' s stress was compared with theoretical value . the comparison shows that non - stress ingredient could be mostly excluded by deducting initial value , and that the modified test - result of stress could well display the real stress state 索塔应力理论值同测试值的比较分析表明：通过扣除初读数的方法，可大大减小应力测试值中非应力成份，能取得良好的应力测试效果。
To improve the present backward condition , an automatic reading system of water meter with ccd has been developed so that water meter can be automatically read by applying image processing technique , which is completely new in our country at present 随着计算机图像处理技术的不断发展，我们提出了应用数字图像处理技术开发水表读数自动识别系统实现水表自动抄表和自动识别读数的解决方案，并成功开发出数字图像水表读数自动识别系统。
This paper , after discussing the basic theory and the application of digital image processing and analyzing the concrete characteristics of the water meter , puts forward the crux algorithm that identifies automatically the position and direction of the pointers of water meter with techniques of the image preprocessing , image segmentation and image analysis and recognition 本文结合水表的具体特点，分析了将图像处理技术应用于自动识别水表指示读数的原理。找到了一种满足一定速度和精度的水表读数识别方法。该方法主要包括水表图像预处理、水表图像分割、指针读数的识别。
