足跡作為刑事偵查的重要證據(jù),能反映地面形貌受細(xì)小顆粒分布的影響產(chǎn)生的變化�，F(xiàn)有非接觸式光學(xué)檢測(cè)方法通過(guò)測(cè)量足跡與地面光強(qiáng)對(duì)比度辨別足跡。引入掠入射照明模式能夠增強(qiáng)二者對(duì)比度。本文使用普通商用彩色相機(jī)對(duì)不同類型地面的足跡進(jìn)行偏振成像。結(jié)果表明,在相機(jī)鏡頭前和光源前端放置線偏振片,能有效提高足跡成像對(duì)比度,其中水平線偏振對(duì)對(duì)比度提升效果最為明顯。通過(guò)相機(jī)3個(gè)顏色通道檢測(cè)偏振圖像光譜特征,實(shí)驗(yàn)結(jié)果表明藍(lán)色通道下獲得最大對(duì)比度。掠入射偏振光成像能有效增強(qiáng)足跡與地面對(duì)比度,為刑事偵查中提取足跡提供有力支撐。 

【文章來(lái)源】：Frontiers of Information Technology & Electronic Engineering. 2019,20(11)EISCICSCD

【文章頁(yè)數(shù)】：9 頁(yè)

【文章目錄】：
1 Introduction
2 Experimental setup
3 Experimental results
    3.1 Grazing incidence unpolarized illumination and unpolarized imaging
    3.2 Grazing incidence polarized illumination and unpolarized imaging
    3.3 Grazing incidence polarized illumination and polarized imaging
4 Quantitative data analysis
5 Simulation and analysis of polarized light scattering
6 Conclusions



本文編號(hào)：3360662