發(fā)布時(shí)間：2018-04-22 17:26

  本文選題：光流法 + 流動(dòng)顯示��； 參考：《西南科技大學(xué)》2017年碩士論文

【摘要】：光流法已廣泛應(yīng)用于計(jì)算機(jī)視覺和圖像檢測(cè)領(lǐng)域。光流法涉及到圖像處理、人工智能和模式識(shí)別等學(xué)科,是當(dāng)今圖像檢測(cè)領(lǐng)域的研究熱點(diǎn)之一,其成果已逐步推廣應(yīng)用到航天、軍事、工業(yè)、醫(yī)學(xué)等行業(yè)。本文圍繞基于光流法的流場(chǎng)測(cè)量顯示技術(shù)展開以下研究:(1)針對(duì)現(xiàn)有HS光流法的控制參數(shù)不能隨計(jì)算結(jié)果進(jìn)行自優(yōu)化,故,本文將衡量光流精度的參數(shù)作為反饋控制參數(shù),作用于計(jì)算過程,同時(shí)將光流值插值回圖片進(jìn)行多次迭代來提高估計(jì)精度。(2)針對(duì)光流出現(xiàn)的大位移問題,提出小波多分辨率分層細(xì)化處理方法,使得光流計(jì)算結(jié)果更加精確。實(shí)驗(yàn)結(jié)果表明:改進(jìn)后的光流算法較傳統(tǒng)HS算法具有更高的準(zhǔn)確性。(3)開展基于光流法的流動(dòng)顯示實(shí)驗(yàn)研究。第一個(gè)是對(duì)機(jī)翼表面摩擦力線提取實(shí)驗(yàn),通過實(shí)驗(yàn)顯示分析得到本文的光流算法可以顯示空氣流過機(jī)翼表面所產(chǎn)生的摩擦力線;第二個(gè)為兩種運(yùn)動(dòng)圖像速度場(chǎng)提取實(shí)驗(yàn),通過分析采集到的風(fēng)洞背景紋影實(shí)驗(yàn)數(shù)據(jù),驗(yàn)證了本文算法可以顯示氣流的流動(dòng)過程。(4)開展光流法在流場(chǎng)測(cè)量工程實(shí)踐中研究即對(duì)復(fù)雜流動(dòng)結(jié)構(gòu)進(jìn)行定量實(shí)驗(yàn)研究。經(jīng)過試驗(yàn)研究可以定量顯示空腔高速流動(dòng)產(chǎn)生的波/渦/剪切層的位置、強(qiáng)弱,極其相互作用關(guān)系。本文算法對(duì)復(fù)雜流動(dòng)結(jié)構(gòu)的定量測(cè)量具有一定的意義。
[Abstract]:Optical flow method has been widely used in computer vision and image detection. Optical flow method is one of the research hotspots in the field of image detection, which involves image processing, artificial intelligence and pattern recognition. Its achievements have been gradually applied to aerospace, military, industrial, medical and other industries. In this paper, the following research is carried out around the flow field measurement and display technology based on optical flow method: 1) since the control parameters of the existing HS optical flow method cannot be self-optimized with the calculation results, the parameters measuring the optical flow accuracy are taken as the feedback control parameters in this paper. In order to solve the problem of large displacement of optical flow, a wavelet multi-resolution hierarchical thinning method is proposed, which makes the calculation result of optical flow more accurate. The experimental results show that the improved optical flow algorithm has higher accuracy than the traditional HS algorithm. The first is the experiment of extracting the friction line of the wing surface, the optical flow algorithm of this paper can show the friction line produced by the air flowing through the wing surface, the second is the velocity field extraction experiment of two kinds of moving images. By analyzing the collected background schlieren data of wind tunnel, it is verified that the proposed algorithm can show the flow process of airflow. 4) the optical flow method is studied in the engineering practice of flow field measurement, that is, the quantitative experimental study on complex flow structure is carried out. The position, strength and interaction of the wave / vortex / shear layer produced by the high velocity flow in the cavity can be quantitatively demonstrated by the experimental study. This algorithm has certain significance for quantitative measurement of complex flow structures.
【學(xué)位授予單位】：西南科技大學(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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