發(fā)布時(shí)間：2018-05-13 15:12

  本文選題：虛擬廣告 + 體育場(chǎng)地��； 參考：《杭州電子科技大學(xué)》2012年碩士論文

【摘要】：隨著電子產(chǎn)業(yè)的發(fā)展,硬件成本下降以及圖像視頻處理各種算法不斷推陳出新,視頻處理技術(shù)在工業(yè)、商業(yè)以及民用方面已經(jīng)達(dá)到實(shí)用的階段。在視頻處理技術(shù)快速發(fā)展的環(huán)境下,虛擬廣告系統(tǒng)應(yīng)運(yùn)而生。虛擬廣告系統(tǒng)可廣泛應(yīng)用于各種體育或文藝節(jié)目的直播中,將演播室制作的虛擬廣告牌插入到賽場(chǎng)或表演場(chǎng)的空地上,或用虛擬廣告牌替換掉場(chǎng)地上原有的廣告牌,合成后可達(dá)到以假亂真的效果,觀眾絲毫不會(huì)覺察。 本文主要對(duì)體育視頻中體育場(chǎng)地的自適應(yīng)提取以及攝像機(jī)運(yùn)動(dòng)跟蹤技術(shù)進(jìn)行了研究,旨在提高虛擬廣告系統(tǒng)的自適應(yīng)性和實(shí)用性。此外,設(shè)計(jì)了一個(gè)高效的視頻采集模塊。論文所做的研究工作和創(chuàng)新點(diǎn)如下： 首先,設(shè)計(jì)并實(shí)現(xiàn)了虛擬廣告系統(tǒng)中的視頻采集模塊,實(shí)時(shí)采集SDI高清視頻。本文采用DirectShow來實(shí)現(xiàn)視頻的采集功能。DirectShow的優(yōu)點(diǎn)是開發(fā)者對(duì)不同的采集卡可以做同樣的應(yīng)用丌發(fā),將應(yīng)用和數(shù)據(jù)傳輸、硬件差異以及同步問題分丌,只需要關(guān)注軟件的實(shí)現(xiàn),提高丌發(fā)效率,系統(tǒng)具有較高的通用性,丌發(fā)者可以便捷開發(fā)出多媒體應(yīng)用,在實(shí)際應(yīng)用中取得了良好的效果。 其次,分析并提出了體育場(chǎng)地的自適應(yīng)提取算法,包括視頻幀主區(qū)域提取、二值化參數(shù)自適應(yīng)以及場(chǎng)地線的精確提取。視頻幀主區(qū)域提取是為了去除場(chǎng)景中包含的大量觀眾區(qū)域等干擾信息,提高圖像檢測(cè)精度和檢測(cè)速度。二值化參數(shù)自適應(yīng)可以在提取場(chǎng)地線時(shí)二值化參數(shù)自動(dòng)得到閾值,使算法適用于各種場(chǎng)地。場(chǎng)地線的提取采用更為精確的基于Hough變換與最小二乘直線擬合方法,實(shí)現(xiàn)對(duì)場(chǎng)地線的自動(dòng)提取。 最后,分析了攝像機(jī)運(yùn)動(dòng)情況下球場(chǎng)標(biāo)志線跟蹤方法,實(shí)現(xiàn)基于自然特征點(diǎn)匹配的運(yùn)動(dòng)跟蹤算法和基于場(chǎng)地模型的運(yùn)動(dòng)跟蹤算法。其中基于自然特征點(diǎn)的運(yùn)動(dòng)跟蹤算法比較耗時(shí),因此,在實(shí)際項(xiàng)目中,本文采用了后一類方法來進(jìn)行運(yùn)動(dòng)跟蹤。在后一類方法中實(shí)現(xiàn)了兩個(gè)方法：基于Hough空間中的直線檢測(cè)方法和基于Kalman濾波的特征點(diǎn)預(yù)估分析方法。對(duì)比分析了在Hough空間與在x-y空間的參數(shù)預(yù)測(cè)方法。最后采用基于Kalman濾波的特征點(diǎn)預(yù)估分析來跟蹤標(biāo)志線。 本文提出的體育場(chǎng)地的自適應(yīng)提取方法和運(yùn)動(dòng)跟蹤方法在虛擬廣告系統(tǒng)中實(shí)現(xiàn)了具體應(yīng)用。實(shí)例表明這幾項(xiàng)技術(shù)在不同體育場(chǎng)地中具有較好的實(shí)用效果。
[Abstract]:With the development of electronic industry, the cost of hardware has decreased and various algorithms of image and video processing have been innovated. Video processing technology has reached a practical stage in industry, commerce and civil. With the rapid development of video processing technology, virtual advertising system emerges as the times require. The virtual advertising system can be widely used in the live broadcast of various sports or cultural programs. The virtual billboards made by the studio can be inserted into the field or the open space of the performance field, or the original billboards on the venue can be replaced with the virtual billboards. After synthesis can achieve the effect of false truth, the audience is not aware of the slightest. In this paper, the adaptive extraction of sports ground and the camera motion tracking technology in sports video are studied in order to improve the adaptability and practicability of the virtual advertising system. In addition, an efficient video capture module is designed. The research work and innovation of the thesis are as follows: Firstly, the video capture module in the virtual advertising system is designed and implemented to capture SDI HD video in real time. The advantage of using DirectShow to realize video capture function. DirectShow is that the developer can do the same application development for different acquisition card, open the application and data transmission, hardware difference and synchronization problem, only need to pay attention to the realization of software. In order to improve the efficiency of development, the system has high generality, and the developer can develop multimedia application conveniently, and has achieved good results in practical application. Secondly, the adaptive extraction algorithm of sports field is analyzed and put forward, including video frame main region extraction, binarization parameter adaptation and exact site line extraction. The main region extraction of video frame is to remove the large amount of interference information such as audience area contained in the scene and to improve the accuracy and speed of image detection. The adaptive binarization parameter can get the threshold value automatically when extracting the site line, which makes the algorithm suitable for all kinds of sites. A more accurate method based on Hough transform and least square straight line fitting is used to extract the site line automatically. Finally, the tracking method of the course marker line under the camera motion is analyzed, and the motion tracking algorithm based on the natural feature point matching and the motion tracking algorithm based on the site model are realized. The motion tracking algorithm based on natural feature points is time-consuming. Therefore, in the actual project, this paper uses the latter method to track motion. Two methods are implemented in the latter method: line detection method based on Hough space and feature point prediction analysis method based on Kalman filter. The methods of parameter prediction in Hough space and x-y space are compared and analyzed. Finally, the feature point prediction analysis based on Kalman filter is used to track the mark line. The adaptive extraction method and motion tracking method proposed in this paper are applied in the virtual advertising system. Examples show that these techniques have better practical effects in different sports venues.
【學(xué)位授予單位】：杭州電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TP391.41

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 謝志揚(yáng);史萍;;網(wǎng)絡(luò)不良視頻信息過濾系統(tǒng)的研究與實(shí)現(xiàn)[J];中國(guó)傳媒大學(xué)學(xué)報(bào)(自然科學(xué)版);2009年04期

2 趙彩紅;左敏;;基于Directshow的視頻抓圖在車牌識(shí)別系統(tǒng)中的應(yīng)用[J];北京工商大學(xué)學(xué)報(bào)(自然科學(xué)版);2008年01期

3 魯敏,郁文賢,鮑虎軍,匡綱要;基于機(jī)電跟蹤的三維虛擬演播室系統(tǒng)[J];電子學(xué)報(bào);2003年S1期

4 張斐;;淺議基于COM的組件化程序設(shè)計(jì)方法[J];硅谷;2011年02期

5 陳臨強(qiáng);呂梁;;基于特征塊統(tǒng)計(jì)的攝像機(jī)跟蹤算法[J];計(jì)算機(jī)工程與應(yīng)用;2008年15期

6 王建宇,劉哲,周獻(xiàn)中;虛擬廣告系統(tǒng)多線程并行模式[J];計(jì)算機(jī)工程;2003年22期

7 杜威,廖永s，

本文編號(hào)：1883711