發(fā)布時(shí)間：2018-05-24 15:39

  本文選題：真正射影像 + DBM整體投影��； 參考：《武漢大學(xué)學(xué)報(bào)(信息科學(xué)版)》2017年01期

【摘要】：為解決城市大比例尺真正射影像制作問題,提出了一種數(shù)字建筑模型(digital building model,DBM)整體投影遮蔽檢測方法。該方法利用DBM表面以矢量三角面存儲(chǔ)和平面圖形投影內(nèi)部柵格互不遮蔽的特點(diǎn),首先以三角面為單元對(duì)整個(gè)建筑物進(jìn)行正射投影得到房頂多邊形;然后進(jìn)行透視投影得到整個(gè)建筑物在像方的成像多邊形,通過數(shù)字高程模型(digital elevation model,DEM)投影迭代算法得到該建筑物在傳統(tǒng)正射影像上的成像多邊形,兩者求差集得到建筑物的遮蔽區(qū)域物方多邊形;最后選取最優(yōu)輔助影像對(duì)遮蔽區(qū)域進(jìn)行紋理補(bǔ)償,制作出真正射影像。實(shí)驗(yàn)結(jié)果表明,該方法能夠快速準(zhǔn)確地檢測出影像遮蔽區(qū)域,為生成高質(zhì)量真正射影像提供了保障和前提。
[Abstract]:In order to solve the problem of making real projective images on large scale in cities, a digital building model, digital building model-DBM, is proposed for global projection shadowing detection. In this method, the DBM surface is stored on the vector triangular surface and the inner grid is not shielded by the plane graph projection. Firstly, the roof polygon is obtained by normalizing the whole building with the triangular plane as the element. Then the imaging polygon of the whole building in the image square is obtained by perspective projection, and the image polygon of the building on the traditional orthophoto image is obtained by the digital elevation model and digital elevation model. The difference sets are obtained to obtain the object square polygon in the shelter area of the building. Finally, the optimum auxiliary image is selected to compensate the texture of the shelter area, and the real image is made. The experimental results show that this method can quickly and accurately detect the shaded area of the image and provide the guarantee and premise for the generation of high quality real image.
【作者單位】： 武漢大學(xué)測繪學(xué)院;重慶市地理信息中心;湖北省國土資源廳國土整治局;湖北工業(yè)大學(xué)計(jì)算機(jī)學(xué)院;
【基金】：國家自然科學(xué)基金(41271431)~~
【分類號(hào)】：TP391.41;P23

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