【摘要】：近年來,計算機(jī)視覺技術(shù)逐漸成熟,其在智能監(jiān)控領(lǐng)域的應(yīng)用愈加廣泛。大量原本需要人工完成的工作都可以由視覺算法來替代,極大地節(jié)約了人力成本。而在智能監(jiān)控領(lǐng)域中,行人流量統(tǒng)計這一技術(shù)在商場、校園等場合都有著廣泛的需求和應(yīng)用,因此設(shè)計出一套智能的行人流量統(tǒng)計算法是十分有必要的。另一方面,如果能夠?qū)⒔谂d起的深度學(xué)習(xí)技術(shù)應(yīng)用于其中,則將極大地提升算法的性能。本文研究并設(shè)計了一種基于深度學(xué)習(xí)的行人流量統(tǒng)計算法。本文通過綜合應(yīng)用基于深度學(xué)習(xí)的目標(biāo)檢測算法、單目標(biāo)跟蹤算法、數(shù)據(jù)關(guān)聯(lián)算法等方法,設(shè)計了一套框架為“檢測-跟蹤-關(guān)聯(lián)”的算法,用來完成對監(jiān)控視頻中行人流量的統(tǒng)計。本文主要進(jìn)行了以下研究工作:首先,本文探究了行人流量統(tǒng)計的應(yīng)用背景并闡述了研究的意義,然后分析了行人流量統(tǒng)計技術(shù)和基于深度學(xué)習(xí)的目標(biāo)檢測算法的發(fā)展現(xiàn)狀,接下來闡述了本文的主要研究內(nèi)容和研究方案,在研究方案中給出設(shè)計好的總體算法和框架。在制定了較為完善的研究方案的基礎(chǔ)上,本文首先研究了卷積神經(jīng)網(wǎng)絡(luò)的組成結(jié)構(gòu)和優(yōu)化方法。然后回顧了傳統(tǒng)目標(biāo)檢測算法和近年來產(chǎn)生的基于卷積神經(jīng)網(wǎng)絡(luò)的目標(biāo)檢測算法,最后確定使用SSD算法作為行人流量統(tǒng)計中的目標(biāo)檢測算法。接下來,本文研究了SSD算法的框架與原理,包括網(wǎng)絡(luò)結(jié)構(gòu)、缺省框的選擇和訓(xùn)練目標(biāo)函數(shù)等。之后,重點研究了SSD中的基網(wǎng)絡(luò),參照SSD原始基網(wǎng)絡(luò)VGG和流行的CNN網(wǎng)絡(luò)結(jié)構(gòu)ZF-Net和SqueezeNet,重新設(shè)計了兩種基網(wǎng)絡(luò)并與VGG進(jìn)行比較,結(jié)合實際需求最終確定了還是使用VGG作為基網(wǎng)絡(luò)。在完成了對基于卷積神經(jīng)網(wǎng)絡(luò)的檢測算法的研究后,本文還研究了需要使用的跟蹤算法、數(shù)據(jù)關(guān)聯(lián)算法和軌跡分析算法。確定了使用KCF算法作為跟蹤算法,并直接使用OpenCV中的跟蹤庫。關(guān)聯(lián)算法選取簡單快速的基于距離的關(guān)聯(lián)算法。最后設(shè)計了軌跡分析算法來實現(xiàn)雙方向的計數(shù)。完成上述工作后,算法便已經(jīng)完整。最后,闡述了實際的操作,包括攝像頭的架設(shè)和樣本視頻的采集、檢測圖像數(shù)據(jù)集的制作、SSD檢測器的訓(xùn)練、跟蹤算法的實現(xiàn)、關(guān)聯(lián)與軌跡分析算法的設(shè)計要點。然后使用設(shè)計的算法對所有樣本視頻進(jìn)行分析,采用一些性能指標(biāo)對其表現(xiàn)進(jìn)行評價,其中平均識別率達(dá)到了96.24%,平均誤檢率為2.19%,平均漏檢率為3.76%,全部視頻平均幀率為24.09。結(jié)果表明所設(shè)計的算法可以能夠滿足項目的需求。
[Abstract]:In recent years, computer vision technology is gradually mature, its application in the field of intelligent monitoring is becoming more and more extensive. A large amount of manual work can be replaced by visual algorithm, which greatly saves manpower cost. In the field of intelligent monitoring, pedestrian flow statistics technology has a wide range of needs and applications in shopping malls, campus and other occasions, so it is necessary to design a set of intelligent pedestrian flow statistics algorithm. On the other hand, if the recently developed depth learning technology can be applied to it, the performance of the algorithm will be greatly improved. In this paper, a pedestrian flow statistic algorithm based on depth learning is studied and designed. In this paper, a set of algorithms called "detection, tracking and association" is designed by synthesizing the methods of target detection based on depth learning, single target tracking and data association. Used to complete the monitoring video traffic statistics. The main work of this paper is as follows: first, this paper explores the application background of pedestrian flow statistics and expounds the significance of the research, and then analyzes the development status of pedestrian flow statistics technology and target detection algorithm based on depth learning. Then, the main research content and research scheme of this paper are described, and the overall algorithm and framework are given in the research scheme. On the basis of a more perfect research scheme, this paper first studies the composition structure and optimization method of convolution neural network. Then the traditional target detection algorithm and the target detection algorithm based on convolution neural network are reviewed. Finally, the SSD algorithm is used as the target detection algorithm in pedestrian flow statistics. Then, this paper studies the framework and principle of SSD algorithm, including network structure, selection of default frame and training objective function. After that, the base network in SSD is studied emphatically. Referring to the original SSD network VGG and the popular CNN network structure ZF-Net and SqueezeNet, two base networks are redesigned and compared with VGG. Finally, VGG is used as the base network according to the actual requirements. After completing the research on the detection algorithm based on convolution neural network, this paper also studies the tracking algorithm, data association algorithm and trajectory analysis algorithm that need to be used. The KCF algorithm is used as the tracking algorithm, and the trace library in OpenCV is used directly. The association algorithm selects the simple and fast distance based association algorithm. Finally, a trajectory analysis algorithm is designed to realize double direction counting. After the above work has been completed, the algorithm is complete. Finally, the practical operation, including the installation of camera and the collection of sample video, the training of SSD detector, the realization of tracking algorithm and the design of correlation and trajectory analysis algorithm are discussed. Then the designed algorithm is used to analyze all the sample video, and some performance indexes are used to evaluate the performance of the video. The average recognition rate is 96.24, the average false detection rate is 2.19, the average missed detection rate is 3.76, and the average frame rate of the whole video is 24.09. The results show that the algorithm can meet the requirements of the project.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TP391.41

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