嵌入式視頻分析系統運用於協助住宅竊盜偵防之研究Residential Burglary Prevention by Embedded Video Analysis System
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- 最後更新日期：109-05-13
- 資料點閱次數：162
資料來源:http://ndltd.ncl.edu.tw/cgi-bin/gs32/gsweb.cgi/ccd=MtgIBv/record?r1=17&h1=5
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住宅竊盜犯罪不僅造成被害人之財產損失，而且被害人常因住家遭竊賊侵入，產生諸多心理症狀，如恐懼、害怕、憤怒與挫折等。住宅竊盜手法當中，「標籤型徵候」手法乃竊賊利用白天觀察住戶動態找對講機門鈴逐樓逐戶打探，若住戶無人回應則利用貼紙或原子筆於對講機按鈕或信箱做記號，隔天再按一次或直接進入行竊，此類手法相當普遍。本論文即以此觀點為出發點，利用嵌入式視頻分析系統，於日間實際於對講機門鈴前操作樹莓派設備擷取人臉影像，採用正規化RGB色彩空間技術，透過正規化減少對光源較為敏感之紅色系及綠色系，降低對影像之影響，以正確擷取膚色範圍，接著透過二值化及形態學影像處理技巧，搭配橢圓樣板比對及眼睛特徵偵測，找出人臉範圍，並紀錄影像擷取結果，即時以簡訊或電子郵件方式回傳屋主警示，降低住宅竊盜情形發生，且日後可供警方犯罪偵查運用參考及評估運用於警政治安功能。Residential burglary crime, does not only cause damage to the property of the victim, but can also affect the victims’ psychology producing symptoms such as fear, being afraid, anger and frustration etc. because a lot of the times, victims were in their homes when the burglary occurred. Residential burglary practices such as the ‘labeling’ technique involves the burglar going door to door during the daytime, using intercom doorbells to check who is present. If there was an absence, the burglar would stick a label or make a pen mark on the intercom button or mailbox. The next day, the burglar would either press the intercom again or directly break and enter inside with the intent to steal property. This is a common practice among burglars. With this point of view, this paper examines the use of embedded video analysis system with the Raspberry Pi device to capture human facial images to record activities facing the intercom doorbell during the day. The use of RBG color space technology when there is limited light source is useful as it is more sensitive to red and green lines, therefore reducing the influences on the image. To retrieve the correct color range, a procedure involving binarization and morphological image processing is created with oval template and eye feature detection to shape out facial features. In addition, the image is captured and an instant text message or email will alert homeowners and therefore reduce burglary in residential homes. For future references, this may be used for criminal investigations and assessments for policing public security.