本文選題：陶瓷貼花 + 紋理映射　； 參考：《江南大學(xué)》2011年碩士論文

【摘要】：為了在網(wǎng)上進(jìn)行虛擬陶瓷藝術(shù)品展覽,需要對現(xiàn)有的陶瓷藝術(shù)品進(jìn)行采樣,作為完整的三維圖像顯示在計(jì)算機(jī)中。然而,目前拍攝的圖片基本按位圖形式表示,并且是二維圖片,無法對圖片中的陶瓷藝術(shù)品進(jìn)行旋轉(zhuǎn)等操作。只是看看圖片而已,無法實(shí)現(xiàn)真正的虛擬陶瓷藝術(shù)品的展示。為此,本文參閱了國內(nèi)外關(guān)于陶瓷貼花與紋理映射的文獻(xiàn)資料,對紋理映射的過程進(jìn)行詳細(xì)分析。發(fā)現(xiàn)要達(dá)到真正虛擬現(xiàn)實(shí)的陶瓷藝術(shù)品。首先,要對陶瓷品的三維圖形進(jìn)行矢量化,同時(shí),要把陶瓷品上的圖片剝離下來,再按陶瓷貼花的形式貼回到矢量化后的旋轉(zhuǎn)曲面上。于是,整個(gè)經(jīng)過矢量化后并存在貼圖旋轉(zhuǎn)曲面可以進(jìn)行展示的操作。在這里,涉及到了幾個(gè)問題,首先是陶瓷品圖像如何矢量化,陶瓷品上的圖案如何剝離,而且由于圖像采樣的局限性,拍攝相片不能把整個(gè)陶瓷品的圖案全部獲取,只能把采樣的正面取出,背面需要重新拍攝進(jìn)行采樣,于是,貼圖時(shí)要求多個(gè)圖片進(jìn)行很好拼接等。錢蘇斌針對旋轉(zhuǎn)曲面圖像的矢量化做了研究,實(shí)現(xiàn)了三維選擇曲面的重建[1]。侯宏偉的論文對紋理映射進(jìn)行了一定的研究[5]。本文對圖案如何剝離以及貼圖如何很好拼接進(jìn)行了研究,提出了一種反紋理映射的方法來提取紋理圖片,并將得到的紋理圖片進(jìn)行了融合拼接合成。然后將得到完整的紋理圖片再映射到旋轉(zhuǎn)曲面上,真正完成陶瓷藝術(shù)品的虛擬化過程。其中著重研究了輪廓提取,正反紋理映射,剝離紋理圖片,圖像融合拼接等方面的內(nèi)容,對相關(guān)技術(shù)進(jìn)行了優(yōu)化和改進(jìn)。最后,在VC環(huán)境下,實(shí)現(xiàn)了一個(gè)陶瓷貼花紋理獲取與裁剪的模擬demo,獲得了較好的效果。 本文主要講述了以下幾個(gè)方面的內(nèi)容: 1:需要建立虛擬映射函數(shù)關(guān)系,需要知道紋理映射的過程。首先介紹了紋理映射的具體過程,以及一些注意的事項(xiàng)。 2:介紹了反紋理映射的方法。首先需要針對不同的半徑創(chuàng)建虛擬映射,因此需要獲取旋轉(zhuǎn)曲面的半徑數(shù)組,以圓柱體為例開始由簡單到復(fù)雜的過程,最后能夠獲取旋轉(zhuǎn)曲面的虛擬映射關(guān)系數(shù)組。 3:利用虛擬映射關(guān)系數(shù)組進(jìn)行反映射,獲取新的紋理圖片。在這過程中會(huì)損失部分點(diǎn)。以空白點(diǎn)來填充后需要進(jìn)行圖像修復(fù)工作,介紹了兩種常用的圖像修復(fù)技術(shù),最后選擇雙線性插值的方法進(jìn)行處理。 4:由于圖像采樣的問題,獲得的新的紋理圖片不能很好的圍繞整個(gè)旋轉(zhuǎn)曲面,因此進(jìn)行多次采樣,將獲取的新的紋理圖片進(jìn)行圖像拼接,以此獲得完整的紋理圖片。 5:最后在VC環(huán)境下實(shí)現(xiàn)上述研究內(nèi)容,取得了較好的效果為用戶提供了良好的交互環(huán)境進(jìn)行操作。
[Abstract]:In order to carry out the virtual ceramic art exhibition on the Internet, it is necessary to sample the existing ceramic works of art and display them in the computer as a complete 3D image.However, the images taken at present are basically represented in bitmap form, and they are two-dimensional images, which can not rotate the ceramic works of art in the pictures and so on.Just look at the picture, can not achieve the real virtual ceramic art display.In this paper, the process of texture mapping is analyzed in detail by referring to domestic and international literature on ceramic decals and textures mapping.Find ceramic art to achieve real virtual reality.Firstly, the three-dimensional graphics of ceramic products should be vectorized. At the same time, the pictures of ceramic products should be stripped off and then pasted back to the rotating surface after vectorization according to the form of ceramic decals.Therefore, the whole after vectorization and the existence of map rotation surface can be displayed operation.Here, there are several problems involved, first of all, how to vectorize the image of ceramic products, how to peel the patterns on ceramic products, and because of the limitations of image sampling, it is impossible to take photos to obtain all the patterns of the whole ceramic products.The front of the sample can only be taken out, the back needs to be re-photographed to sample, so the mapping requires many pictures to be well stitched and so on.Qian Subin studied the vectorization of rotating surface image and realized the reconstruction of 3D selective surface [1].Hou Hongwei's thesis has carried on the certain research to the texture mapping [5].In this paper, we study how to peel the pattern and how to splice the texture well. A method of anti-texture mapping is proposed to extract the texture image, and the resultant texture image is fused and synthesized.Then the whole texture image is mapped to the rotating surface, and the virtualization process of ceramic art is completed.Among them, the contents of contour extraction, forward and inverse texture mapping, peel texture image, image fusion and stitching are studied, and the related techniques are optimized and improved.Finally, in VC environment, a ceramic decal texture acquisition and clipping simulation demo is realized, and a good effect is obtained.This paper mainly describes the following aspects:1: need to establish virtual mapping function relationship, need to know the process of texture mapping.Firstly, the paper introduces the process of texture mapping and some points for attention.2: the method of inverse texture mapping is introduced.Firstly, we need to create virtual mapping for different radii, so we need to obtain the radius array of rotation surface, take cylinder as an example to start the process from simple to complex, finally we can obtain the virtual mapping relation array of rotation surface.3: using virtual mapping relation array to reflect and obtain new texture images.Part of the point is lost in the process.Two common image restoration techniques are introduced, and bilinear interpolation is used to process them.4: because of the problem of image sampling, the new texture image can not revolve around the whole surface well, so the new texture image can be stitched to get the complete texture picture.Finally, the above research contents are realized in VC environment, and good results are obtained for users to operate in a good interactive environment.
【學(xué)位授予單位】：江南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TP391.41

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