發(fā)布時(shí)間：2018-12-18 18:34

【摘要】：人體行為分析技術(shù)是計(jì)算機(jī)視覺領(lǐng)域的一個(gè)研究熱點(diǎn)問題。該技術(shù)在視頻監(jiān)控、感知接口、運(yùn)動(dòng)分析和虛擬現(xiàn)實(shí)等多個(gè)領(lǐng)域均具有廣闊的應(yīng)用前景。其中如何有效克服遮擋和多義性、環(huán)境的復(fù)雜變化性以及人體的非剛體性等困難的影響成為人體行為分析技術(shù)中的一個(gè)重要任務(wù)。基于此,本文圍繞基于雙目視覺的人體行為分析技術(shù)展開研究,重點(diǎn)針對(duì)基于雙目視覺的立體匹配與深度信息獲取方法和基于卷積神經(jīng)網(wǎng)絡(luò)的人體行為分析算法展開了分析與研究,提出了一些解決方法和改進(jìn)措施。本文研究的主要內(nèi)容如下:1、在基于雙目視覺的立體匹配與深度信息獲取算法研究中,提出了一種基于人體邊緣信息的SURF(Speeded-Up Robust Features-簡(jiǎn)稱SURF)與區(qū)域匹配結(jié)合的立體匹配算法。該算法旨在降低遮擋和多義性造成的影響,引入三維深度信息提高行為分析算法的精度。該方法包括雙目視覺系統(tǒng)標(biāo)定、運(yùn)動(dòng)目標(biāo)檢測(cè)、SURF立體匹配與區(qū)域匹配優(yōu)化、三維信息獲取四個(gè)部分。在采用平面模板兩步法完成雙目視覺系統(tǒng)的標(biāo)定后,采用改進(jìn)的混合高斯模型的背景差分法提取人體運(yùn)動(dòng)目標(biāo)。在匹配過程中,先對(duì)獲取的人體邊緣信息進(jìn)行SURF匹配,然后結(jié)合基于極限約束的區(qū)域匹配算法進(jìn)一步優(yōu)化匹配結(jié)果,提高人體特征點(diǎn)匹配的精度。最后根據(jù)得到的匹配點(diǎn)獲取三維深度信息。實(shí)驗(yàn)結(jié)果表明,該算法能夠準(zhǔn)確獲取人體三維空間坐標(biāo),有效避免遮擋和多義性的干擾。2、在基于雙目視覺的人體行為分析算法研究中,提出了一種基于小樣本卷積神經(jīng)網(wǎng)絡(luò)(Convolutional Neural Networks-簡(jiǎn)稱CNN)的人體行為分析算法。卷積神經(jīng)網(wǎng)絡(luò)分為特征提取層和特征映射層。在特征提取層,利用CNN神經(jīng)元感知并提取局部特征;然后利用由多個(gè)特征映射層組成的網(wǎng)絡(luò)層進(jìn)行相應(yīng)的計(jì)算,使得特征提取精度更為準(zhǔn)確可靠。基于小樣本卷積神經(jīng)網(wǎng)絡(luò)的人體行為分析算法分別對(duì)雙目視覺系統(tǒng)下左右相機(jī)采集的圖像采用CNN方法進(jìn)行分類識(shí)別,然后對(duì)左右圖像的識(shí)別結(jié)果進(jìn)行權(quán)值融合處理,通過調(diào)節(jié)系統(tǒng)參數(shù),獲取更高的行為匹配度。實(shí)驗(yàn)結(jié)果表明,該算法能夠?qū)�單人�?dòng)作和交互動(dòng)作進(jìn)行準(zhǔn)確識(shí)別,有效提高人體行為分析算法的識(shí)別率。
[Abstract]:Human behavior analysis is a hot topic in the field of computer vision. This technology has broad application prospects in many fields such as video surveillance, perceptual interface, motion analysis and virtual reality. How to effectively overcome the influence of occlusion and polysemy, the complexity of environment and the non-rigid nature of human body has become an important task in human behavior analysis technology. Based on this, this paper focuses on the research of human behavior analysis technology based on binocular vision. The methods of stereo matching and depth information acquisition based on binocular vision and the algorithm of human behavior analysis based on convolutional neural network are analyzed and studied, and some solutions and improvement measures are put forward. The main contents of this paper are as follows: 1. In the research of stereo matching and depth information acquisition algorithm based on binocular vision, A stereo matching algorithm combining SURF (Speeded-Up Robust Features- SURF) and region matching based on human edge information is proposed. The algorithm aims to reduce the influence of occlusion and polysemy and improve the accuracy of behavior analysis algorithm by introducing 3D depth information. The method includes four parts: binocular vision system calibration, moving target detection, SURF stereo matching and region matching optimization, and 3D information acquisition. After the calibration of the binocular vision system was completed by using the plane template two-step method, the background difference method of the improved mixed Gao Si model was used to extract the moving target of human body. In the process of matching, the human body edge information is first matched by SURF, and then the matching result is optimized by combining the region matching algorithm based on limit constraint to improve the accuracy of human body feature point matching. Finally, the 3D depth information is obtained according to the matching points. The experimental results show that the algorithm can accurately obtain the three-dimensional coordinates of human body and avoid the interference of occlusion and polysemy. 2. In the research of human behavior analysis algorithm based on binocular vision, A human behavior analysis algorithm based on small sample convolution neural network (Convolutional Neural Networks- for short CNN) is proposed. Convolution neural network is divided into feature extraction layer and feature mapping layer. In the feature extraction layer, the CNN neuron is used to perceive and extract the local features, and then the network layer composed of multiple feature mapping layers is used to calculate the feature extraction accuracy more accurately and reliably. The human behavior analysis algorithm based on small sample convolution neural network uses CNN method to classify and recognize the images collected by left and right cameras in binocular vision system, and then carries on the weight fusion processing to the recognition results of left and right images. By adjusting the system parameters, a higher behavior matching degree can be obtained. The experimental results show that the algorithm can accurately identify single action and interactive action, and improve the recognition rate of human body behavior analysis algorithm.
【學(xué)位授予單位】：北方工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TP391.41

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本文編號(hào)：2386312