本文關(guān)鍵詞： 古地震探槽 基于圖像建模 正射鑲嵌 三維圖像模型　出處：《地震地質(zhì)》2017年01期 　論文類型：期刊論文

【摘要】：探槽揭露的地質(zhì)構(gòu)造信息十分珍貴,是正確認(rèn)識斷層活動性和古地震信息的關(guān)鍵資料,但是探槽本身無法長久妥善保存,因此完整精確地記錄探槽揭露的地質(zhì)構(gòu)造信息一直受到人們的重視。傳統(tǒng)的探槽記錄方法主要有素描和照片拼接2種,但前者缺乏色彩信息且包含過多主觀解釋內(nèi)容;后者在照片幾何拼接過程中會出現(xiàn)接邊、畸變等問題。文中以甘肅省天橋溝-黃羊川斷裂的柳條河探槽為例,介紹1種完整記錄探槽高精度的三維地質(zhì)構(gòu)造信息的技術(shù)方法和工作流程。該方法基于三維圖像建模和正射鑲嵌技術(shù),首先在野外對清理好的探槽建立控制點(diǎn)或比例尺,用數(shù)碼相機(jī)采集探槽所有剖面及周邊微地貌照片,然后在室內(nèi)用圖像建模軟件進(jìn)行探槽的三維圖像建模,最后生成探槽的三維圖像模型及其剖面的正射鑲嵌圖。結(jié)果表明:探槽的三維圖像建模既可以實(shí)現(xiàn)高分辨率正射照片鑲嵌的自動化,又可以高效、低成本地獲得高精度的探槽三維圖像模型,不僅有利于探槽信息的存儲,更可以直觀地獲取更多地質(zhì)構(gòu)造三維信息。
[Abstract]:The geological structure information revealed by the trench is very valuable and is the key data for correctly understanding fault activity and paleoseismic information, but the trough itself cannot be properly preserved for a long time. Therefore, people always pay attention to the complete and accurate recording of geological structure information exposed by the trench. There are two kinds of traditional methods of trench recording: sketch and photo stitching, but the former lacks color information and contains too much subjective interpretation. In this paper, the wicker channel of Tianqiao Gou-Huangyangchuan fault in Gansu Province is taken as an example. This paper introduces a technical method and workflow for complete recording of 3-D geological structure information with high accuracy of grooves. Based on 3D image modeling and forward projecting mosaic technology, a control point or scale is established in the field for cleaned grooves. The digital camera is used to collect all the profiles of the grooves and the microgeomorphology around the grooves, and then the 3D images of the grooves are modeled using the image modeling software in the room. Finally, 3D image models of grooves and forward mosaics of sections are generated. The results show that 3D image modeling of grooves can not only realize automation of high-resolution orthophoto mosaic, but also be efficient. It is not only beneficial to store the information of the grooves but also to obtain more 3D information of geological structure intuitively to obtain high precision 3D image model of grooves at low cost.
【作者單位】： 中國地震局地質(zhì)研究所活動構(gòu)造與火山重點(diǎn)實(shí)驗(yàn)室;
【基金】：中國地震局地震行業(yè)科研專項(xiàng)(201408023)資助
【分類號】：P315

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本文編號：1494571