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A Convolutional Neural Network Based Optical Character Recognition for Purely Handwritten Characters and Digits
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作者 Syed Atir Raza Muhammad Shoaib Farooq +3 位作者 Uzma Farooq Hanen Karamti Tahir Khurshaid Imran Ashraf 《Computers, Materials & Continua》 2025年第8期3149-3173,共25页
Urdu,a prominent subcontinental language,serves as a versatile means of communication.However,its handwritten expressions present challenges for optical character recognition(OCR).While various OCR techniques have bee... Urdu,a prominent subcontinental language,serves as a versatile means of communication.However,its handwritten expressions present challenges for optical character recognition(OCR).While various OCR techniques have been proposed,most of them focus on recognizing printed Urdu characters and digits.To the best of our knowledge,very little research has focused solely on Urdu pure handwriting recognition,and the results of such proposed methods are often inadequate.In this study,we introduce a novel approach to recognizing Urdu pure handwritten digits and characters using Convolutional Neural Networks(CNN).Our proposed method utilizes convolutional layers to extract important features from input images and classifies them using fully connected layers,enabling efficient and accurate detection of Urdu handwritten digits and characters.We implemented the proposed technique on a large publicly available dataset of Urdu handwritten digits and characters.The findings demonstrate that the CNN model achieves an accuracy of 98.30%and an F1 score of 88.6%,indicating its effectiveness in detecting and classifyingUrdu handwritten digits and characters.These results have far-reaching implications for various applications,including document analysis,text recognition,and language understanding,which have previously been unexplored in the context of Urdu handwriting data.This work lays a solid foundation for future research and development in Urdu language detection and processing,opening up new opportunities for advancement in this field. 展开更多
关键词 image processing natural language processing handwritten Urdu characters optical character recognition deep learning feature extraction CLASSIFICATION
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The early Japanese books reorganization by combining image processing and deep learning 被引量:1
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作者 Bing Lyu Hengyi Li +1 位作者 Ami Tanaka Lin Meng 《CAAI Transactions on Intelligence Technology》 SCIE EI 2022年第4期627-643,共17页
Many early Japanese books record a large amount of information,including historical politics,economics,culture,and so on,which are all valuable legacies.These books are waiting to be reorganized at the moment.However,... Many early Japanese books record a large amount of information,including historical politics,economics,culture,and so on,which are all valuable legacies.These books are waiting to be reorganized at the moment.However,a large amount of the books are described by Kuzushiji,a type of handwriting cursive script that is no longer in use today and only readable by a few experts.Therefore,researchers are trying to detect and recognise the characters from these books through modern techniques.Unfortunately,the characteristics of the Kuzushiji,such as Connect-Separate-characters and Manyvariation,hinder the modern technique assisted re-organisation.Connect-Separatecharacters refer to the case of some characters connecting each other or one character being separated into unconnected parts,which makes character detection hard.Manyvariation is one of the typical characteristics of Kuzushiji,defined as the case that the same character has several variations even if they are written by the same person in the same book at the same time,which increases the difficulty of character recognition.In this sense,this paper aims to construct an early Japanese book reorganisation system by combining image processing and deep learning techniques.The experimentation has been done by testing two early Japanese books.In terms of character detection,the final Recall,Precision and F-value reaches 79.8%,80.3%,and 80.0%,respectively.The deep learning based character recognition accuracy of Top3 reaches 69.52%,and the highest recognition rate reaches 82.57%,which verifies the effectiveness of our proposal. 展开更多
关键词 character recognition deep learning image processing Japanese books reorganization Kuzushiji
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Handwritten Numeric and Alphabetic Character Recognition and Signature Verification Using Neural Network
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作者 Md. Hasan Hasnain Nashif Md. Badrul Alam Miah +6 位作者 Ahsan Habib Autish Chandra Moulik Md. Shariful Islam Mohammad Zakareya Arafat Ullah Md. Atiqur Rahman Md. Al Hasan 《Journal of Information Security》 2018年第3期209-224,共16页
Handwritten signature and character recognition has become challenging research topic due to its numerous applications. In this paper, we proposed a system that has three sub-systems. The three subsystems focus on off... Handwritten signature and character recognition has become challenging research topic due to its numerous applications. In this paper, we proposed a system that has three sub-systems. The three subsystems focus on offline recognition of handwritten English alphabetic characters (uppercase and lowercase), numeric characters (0 - 9) and individual signatures respectively. The system includes several stages like image preprocessing, the post-processing, the segmentation, the detection of the required amount of the character and signature, feature extraction and finally Neural Network recognition. At first, the scanned image is filtered after conversion of the scanned image into a gray image. Then image cropping method is applied to detect the signature. Then an accurate recognition is ensured by post-processing the cropped images. MATLAB has been used to design the system. The subsystems are then tested for several samples and the results are found satisfactory at about 97% success rate. The quality of the image plays a vital role as the images of poor or mediocre quality may lead to unsuccessful recognition and verification. 展开更多
关键词 SIGNATURE Handwritten character image processing FEATURE EXTRACTION NEURAL Network recognition
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Container Image ID Recognition
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作者 ZHU Qiu-yu, BAN Jin-cheng, KAN Wei School of Communmcation and Information Engineerig Shanghai Univerity, Shanghai 200072, China 《Advances in Manufacturing》 SCIE CAS 2000年第S1期51-53,共3页
The paper studies a technique of container image ID recognition In the image preprocessing phase, thresholdiong based on histogram and adaptive thresholding is used in the character segmentation phase, a labeling ... The paper studies a technique of container image ID recognition In the image preprocessing phase, thresholdiong based on histogram and adaptive thresholding is used in the character segmentation phase, a labeling method is used, which is based on connected region, location of character block, location of character line recovery of absent and fragmented characters In the recognition phase, adaptive template match and multiple image results synthesis are used A high recognition rate is obtained 展开更多
关键词 character recognition CONTAINER image processing
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Water level recognition based on deep learning and character interpolation strategy for stained water gauge
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作者 Xiaolong Wang Zhong Li +1 位作者 Yanwei Zhang Guocheng An 《River》 2023年第4期506-517,共12页
Due to the diversity of climate and environment in China,the frequent occurrence of extreme rainfall events has brought great challenges to flood prevention.Water level measurement is one of the important research top... Due to the diversity of climate and environment in China,the frequent occurrence of extreme rainfall events has brought great challenges to flood prevention.Water level measurement is one of the important research topics of flood prevention.Recently,the image‐based water level recognition method has become an important part of water level measurement research due to its advantages in easy installation,low cost,and zero need of manual reading.However,there are two mainly shortcomings of the existing imagebased water level recognition methods:(1)severely affected by light intensity and(2)low accuracy of water level recognition for stained water gauges.To solve these two problems,this paper proposes a water level recognition method in consideration of complex scenarios.This method first uses a semantic segmentation convolutional neural network to extract the water gauge mask,and then uses the YOLOv5 object detection network to extract the letter“E”on the water gauge.Based on the character sequence inspection strategy,the algorithm dynamically compensates for the missed detection of characters of stained water gauges.Through a large number of experiments,the proposed water level measurement method has good robustness in complex scenarios,meeting the needs of flash flood defense. 展开更多
关键词 character sequence inspection image processing semantic segmentation water level recognition YOLOv5
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Automated Extraction and Analysis of CBC Test from Scanned Images
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作者 Iman S. Alansari 《Journal of Software Engineering and Applications》 2024年第2期129-141,共13页
Health care is an important part of human life and is a right for everyone. One of the most basic human rights is to receive health care whenever they need it. However, this is simply not an option for everyone due to... Health care is an important part of human life and is a right for everyone. One of the most basic human rights is to receive health care whenever they need it. However, this is simply not an option for everyone due to the social conditions in which some communities live and not everyone has access to it. This paper aims to serve as a reference point and guide for users who are interested in monitoring their health, particularly their blood analysis to be aware of their health condition in an easy way. This study introduces an algorithmic approach for extracting and analyzing Complete Blood Count (CBC) parameters from scanned images. The algorithm employs Optical Character Recognition (OCR) technology to process images containing tabular data, specifically targeting CBC parameter tables. Upon image processing, the algorithm extracts data and identifies CBC parameters and their corresponding values. It evaluates the status (High, Low, or Normal) of each parameter and subsequently presents evaluations, and any potential diagnoses. The primary objective is to automate the extraction and evaluation of CBC parameters, aiding healthcare professionals in swiftly assessing blood analysis results. The algorithmic framework aims to streamline the interpretation of CBC tests, potentially improving efficiency and accuracy in clinical diagnostics. 展开更多
关键词 image processing Optical character recognition Tesseract OCR Health Care Application
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书面调度命令信息智能识别与提取方法研究
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作者 赵仲瑜 刘海宁 +1 位作者 唐伟忠 李承锡 《铁路计算机应用》 2025年第5期22-27,共6页
调度命令是铁路运输调度指挥工作的核心指令,准确、快速地传达调度命令,是保障铁路系统在复杂运营环境中安全、高效、有序运转的前提条件。目前,铁路运输生产中存在诸多书面调度命令传递的场景,需要由人工读取书面调度命令信息,并完成... 调度命令是铁路运输调度指挥工作的核心指令,准确、快速地传达调度命令,是保障铁路系统在复杂运营环境中安全、高效、有序运转的前提条件。目前,铁路运输生产中存在诸多书面调度命令传递的场景,需要由人工读取书面调度命令信息,并完成相关数据录入,耗时费力、效率较低,且易出现信息错误录入和漏传等问题。基于书面调度命令的特点,文章研究书面调度命令信息智能识别与提取方法,将图像分割处理与经典光学字符识别(OCR,Optical Character Recognition)算法相结合,增强对表格结构和文本内容的识别能力,更为精确地分割、定位和识别书面调度命令中的文字信息;并结合调度命令模板和用语规范,完成关键信息的提取。实验结果表明,在字符识别前先进行表格分割处理,对于提高调度命令文字识别准确率效果显著,便于后续调度命令结构化数据的自动提取。 展开更多
关键词 调度命令 图像处理 光学字符识别 深度学习 边缘检测
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Research on the Early Warning System of Cold Chain Cargo Based on OCR Technology
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作者 Jiaxuan Meng 《World Journal of Engineering and Technology》 2022年第3期527-538,共12页
This paper designs a set of semi-automatic intelligent cold chain cargo proximity warning system with wireless data transmission, lightweight Optical Character Recognition identification algorithm framework and electr... This paper designs a set of semi-automatic intelligent cold chain cargo proximity warning system with wireless data transmission, lightweight Optical Character Recognition identification algorithm framework and electronic label automatic warning as the core technology for cold chain dairy Fast Moving Consumer Goods contractors. In terms of hardware, Pulse Frequency Modulation modulation and demodulation are used as the main technology to realize wireless transmission and reception of equipment, and digital electronic tags are added to warn the same batch of upcoming goods. In terms of software, based on Chinese-ocr algorithm, image preprocessing and recognition methods are studied, and an early warning system is designed. So as to realize semi-automatic early warning of cold chain logistics goods. 展开更多
关键词 Optical character recognition Wireless Signal Transmission image processing Cold Chain Logistics Managemen Automatic Early Warning System
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基于有向单连通链的表格框线检测算法 被引量:25
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作者 郑冶枫 刘长松 +1 位作者 丁晓青 潘世言 《软件学报》 EI CSCD 北大核心 2002年第4期790-796,共7页
表格框线检测是表格识别的基础.现有的表格框线检测算法或者速度慢,或者鲁棒性差,而且没有充分利用表格框线之间的约束信息提出了一种基于所定义的图像结构基元“有向单连通链”的自底向上表格框线检测算法.在此算法中,有向单连通链是... 表格框线检测是表格识别的基础.现有的表格框线检测算法或者速度慢,或者鲁棒性差,而且没有充分利用表格框线之间的约束信息提出了一种基于所定义的图像结构基元“有向单连通链”的自底向上表格框线检测算法.在此算法中,有向单连通链是一种黑像素游程序列,作为非常合适的矢量基元,在引入一定表格框线约束信息的条件下合并单连通链,有效地去除伪框线,补全断裂的框线,提高了算法的鲁棒性,可以准确而快速地提取表格框线.通过滤除噪声单连通链,加快单连通链的合并速度,算法速度提高了3~10倍,满足了实用要求、实验证明,该算法具有速度较快、鲁棒性高、抗任意角度的倾斜、抗断裂等优点. 展开更多
关键词 表格识别 图像分析 光学字符识别 智能文档处理 表格框线检测算法 有向单连通链
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一种基于改进模板匹配的车牌字符识别方法 被引量:40
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作者 马俊莉 莫玉龙 王明祥 《小型微型计算机系统》 CSCD 北大核心 2003年第9期1670-1672,共3页
提出了一种改进的模板匹配方法 .该方法是在传统的模板匹配方法的基础上 ,通过对字符特征区域的扩大和加强注意设计了一种改进的模板 ,以达到更有效的匹配结果 .将该方法应用于沪宁高速公路收费口处实拍的车牌图像库中 ,其平均识别率达... 提出了一种改进的模板匹配方法 .该方法是在传统的模板匹配方法的基础上 ,通过对字符特征区域的扩大和加强注意设计了一种改进的模板 ,以达到更有效的匹配结果 .将该方法应用于沪宁高速公路收费口处实拍的车牌图像库中 ,其平均识别率达到 97.1% . 展开更多
关键词 字符识别 模板匹配 图像处理
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基于主分量分析的手写数字字符识别 被引量:22
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作者 芮挺 沈春林 +1 位作者 丁健 张金林 《小型微型计算机系统》 CSCD 北大核心 2005年第2期289-292,共4页
针对手写数字字符识别中由于书写习惯和风格的不同 ,造成字符模式不稳定的问题 ,提出了一种图像预处理方法 .首先采用数学形态学通过细化和膨胀 ,统一字符笔画的粗细 ,并使字符的局部特征得到改善 ;然后利用主分量分析法 (PCA)抽取字符... 针对手写数字字符识别中由于书写习惯和风格的不同 ,造成字符模式不稳定的问题 ,提出了一种图像预处理方法 .首先采用数学形态学通过细化和膨胀 ,统一字符笔画的粗细 ,并使字符的局部特征得到改善 ;然后利用主分量分析法 (PCA)抽取字符特征 ,估计字符的重建模型 ,并通过对重建模型的误差分析进行字符识别 ;最后通过对美国国家邮政局 U SPS字库中全部数字字符完整的识别实验 ,证实了算法的鲁棒性和准确性 . 展开更多
关键词 手写字符识别 图像处理 数学形态学 主分量分析
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一种基于特征提取的手写字符识别技术 被引量:8
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作者 黄瀚敏 汪先矩 +1 位作者 易正俊 马笑潇 《重庆大学学报(自然科学版)》 CAS CSCD 2000年第1期66-69,共4页
在分析图象处理及其特征提取理论的基础上,研究了字符的笔划特点, 探讨了手写字符的宽度、交叉点、链码等特征,用提取字符结构特征的方法,设计并实现了一种手写字符识别系统。实践证明了这些特征简单明确。
关键词 图象处理 字符结构 手写字符识别 特征提取
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一种实用视觉识别的仪表自动检定系统 被引量:14
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作者 严义 包健 《仪表技术与传感器》 CSCD 北大核心 2002年第1期28-30,共3页
介绍一种基于图像处理和神经网络识别技术的温控仪表自动检定系统。在系统中 ,计算机对被测仪表发出模拟热电偶测量信号 ,并获取被测仪表显示值的视图 ,经过数字图像预处理后 ,采用神经网络感知器算法予以识别 ,得到仪表显示数。将被测... 介绍一种基于图像处理和神经网络识别技术的温控仪表自动检定系统。在系统中 ,计算机对被测仪表发出模拟热电偶测量信号 ,并获取被测仪表显示值的视图 ,经过数字图像预处理后 ,采用神经网络感知器算法予以识别 ,得到仪表显示数。将被测仪表显示数与计算机内的测量值比较 ,其误差曲线即可确定该被测仪表的精度。 展开更多
关键词 温控仪表 自动检定 图像处理 感知器 数字识别 自动检测系统
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自然场景文本定位 被引量:17
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作者 欧文武 朱军民 刘昌平 《中文信息学报》 CSCD 北大核心 2004年第5期42-47,63,共7页
随着自然场景文本识别研究的不断深入 ,建立标准的场景文本图像库和了解该领域的研究现状变得越来越重要。为此 ,2 0 0 3年国际文档分析和识别大会专门建立了一个这样的图像库 ,并组织了自然场景文本识别比赛 ,我们参加了其中的自然场... 随着自然场景文本识别研究的不断深入 ,建立标准的场景文本图像库和了解该领域的研究现状变得越来越重要。为此 ,2 0 0 3年国际文档分析和识别大会专门建立了一个这样的图像库 ,并组织了自然场景文本识别比赛 ,我们参加了其中的自然场景文本定位分赛。本文对我们参加这次比赛的算法做了介绍并给出了比赛结果 ,在文章最后 ,对参赛算法做了比较 。 展开更多
关键词 人工智能 模式识别 文本定位 边缘密度 字符识别 图像处理
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结合独立与连续字符识别的集装箱号识别技术 被引量:5
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作者 陈默 何小海 +2 位作者 吴炜 杨晓敏 付光荣 《四川大学学报(工程科学版)》 EI CAS CSCD 北大核心 2011年第S1期139-145,共7页
针对集装箱号字符排列方式多样、字符间隔随机、且存在字符紧密排列难以分割开的情况,提出一种将独立字符识别与连续字符识别结合起来应用于集装箱箱号识别的方法。在字符提取阶段,将相互间存在一定间隔的字符作为单个字符进行提取;将... 针对集装箱号字符排列方式多样、字符间隔随机、且存在字符紧密排列难以分割开的情况,提出一种将独立字符识别与连续字符识别结合起来应用于集装箱箱号识别的方法。在字符提取阶段,将相互间存在一定间隔的字符作为单个字符进行提取;将紧密排列的字符作为连续字符串进行整体提取。在字符识别阶段,对于单个字符采用基于神经网络的独立字符识别方法进行识别;而对于连续字符串,则利用基于HMM的连续字符识别技术进行识别。通过对1040幅集装箱号图像进行实验,识别率达92.5%。实验结果表明本文方法能够有效地对各种情况(包括字符紧密排列)的集装箱号图像进行识别。 展开更多
关键词 计算机视觉 图像处理 字符识别 隐马尔可夫模型
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Android图文同步识别系统的设计和实现 被引量:14
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作者 刘淼 杨镇豪 +2 位作者 谢韵玲 谢冬青 唐春明 《计算机工程与设计》 CSCD 北大核心 2014年第6期2207-2213,共7页
针对开源识别引擎Tesseract-OCR对噪点多、亮度不均匀及规格不统一的图像识别效果不佳的情况,设计和实现了一种基于Android平台,能大幅度提高质量不高图像识别率的图文同步识别系统。实现了预览同步识别、联网上传识别、图像批量识别等... 针对开源识别引擎Tesseract-OCR对噪点多、亮度不均匀及规格不统一的图像识别效果不佳的情况,设计和实现了一种基于Android平台,能大幅度提高质量不高图像识别率的图文同步识别系统。实现了预览同步识别、联网上传识别、图像批量识别等功能,通过对图像进行消噪、亮度均衡及阈值分割等质量增强算法处理,提高了图像的最终识别率。新颖的同步识别模式有别于传统的图文识别软件,使用户在预览图像时能够即时看到识别效果,给使用者带来一种全新的用户体验。 展开更多
关键词 ANDROID应用 Tesseract-OCR 图像处理 同步识别 文字识别 识别系统
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图像识别在目标自动识别系统中的应用 被引量:7
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作者 纪淑波 刘晶 孟庆凤 《电光与控制》 北大核心 2006年第3期109-112,共4页
图像处理系统主要包括采用摄像机、图像采集卡、计算机等硬件设备,进行实时图像采集,用灰度直方图方法从摄取含背景图像的目标图像,采用多种分割技术和多个简单识别器融合方法进行目标图像识别,不仅大幅提高了识别率而且缩短了识别耗时... 图像处理系统主要包括采用摄像机、图像采集卡、计算机等硬件设备,进行实时图像采集,用灰度直方图方法从摄取含背景图像的目标图像,采用多种分割技术和多个简单识别器融合方法进行目标图像识别,不仅大幅提高了识别率而且缩短了识别耗时。本文以车牌自动识别系统设计为例。 展开更多
关键词 字符识别 模式识别 数字图像处理 直方图均衡 图像分割
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基于小波滤波器的浮动阈值算法 被引量:4
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作者 叶俊勇 汪同庆 +1 位作者 杨波 彭健 《光电工程》 CAS CSCD 北大核心 2002年第5期52-55,共4页
在处理光照不均匀的图像分割时用常用的阈值分割方法不能得到良好的分割效果,通过分析图像特征及对小波分析理论的研究,提出采用小波滤波器将滤波以后的低通图像作为图像的浮动阈值进行二值化,获得了比较理想的效果。该算法在枪支在线OC... 在处理光照不均匀的图像分割时用常用的阈值分割方法不能得到良好的分割效果,通过分析图像特征及对小波分析理论的研究,提出采用小波滤波器将滤波以后的低通图像作为图像的浮动阈值进行二值化,获得了比较理想的效果。该算法在枪支在线OCR识别系统中得到实际应用。 展开更多
关键词 浮动阈值算法 图像处理 小波滤波器 二值化 光学字符识别 OCR
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汽车牌照图像的预处理研究 被引量:6
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作者 徐全生 于霞 梁乐彬 《沈阳工业大学学报》 EI CAS 2002年第2期121-124,共4页
讨论了平滑和二值化方法,提出一种改进的适合汽车牌照图像自身特点的去噪及二值化方法.该方法将平滑和二值化结合起来,对螺丝钉、大污点、牌照边框、字符分割不当等引起的噪声非常有效,为正确的特征抽取提供了保证.
关键词 图像预处理 车牌识别 文字识别 汽车牌照 智能交通 交通管理
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基于神经网络的字符识别技术研究 被引量:6
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作者 黄瀚敏 易正俊 +1 位作者 汪先矩 汪瑞芳 《重庆大学学报(自然科学版)》 EI CAS CSCD 1999年第6期59-65,共7页
本文在分析人工神经网络理论和图象处理及其特征提取理论的基础上,探讨了网络结构、特征编码、算法的实现、学习样本的收集、网络参数的选择及BP算法缺陷等问题,设计并实现了一种基于神经网络的字符识别系统。并针对BP算法的缺陷... 本文在分析人工神经网络理论和图象处理及其特征提取理论的基础上,探讨了网络结构、特征编码、算法的实现、学习样本的收集、网络参数的选择及BP算法缺陷等问题,设计并实现了一种基于神经网络的字符识别系统。并针对BP算法的缺陷问题提出改进方法并得以实现,提出建立奇异样本特征库的方法使学习的效率大大的提高。实践证明采用改进型BP算法的三层前向无反馈神经网络进行手写字符识别是完全可行和实用的。 展开更多
关键词 神经网络 图象处理 BP算法 字符识别 特征提取
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