Texture Generation Method of Three‑Dimensional Model of Crime Scene Based On Multi Panoramic Images

Meng Liu; Si Shen; Dongbin Duan; Wenying Yao

doi:10.3788/LOP202259.1611008

Journals >Laser & Optoelectronics Progress >Volume 59 >Issue 16 >Page 1611008 > Article

Laser & Optoelectronics Progress
Vol. 59, Issue 16, 1611008 (2022)

Texture Generation Method of Three‑Dimensional Model of Crime Scene Based On Multi Panoramic Images

Meng Liu^1、*, Si Shen¹, Dongbin Duan², and Wenying Yao²

Author Affiliations

¹Department of Criminal Science and Technology, Zhejiang Police College, Hangzhou 310053, Zhejiang , China

²Zhejiang Angelcomm Technology Co., Ltd., Hangzhou 310008, Zhejiang , China

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DOI: 10.3788/LOP202259.1611008 Cite this Article Set citation alerts

Meng Liu, Si Shen, Dongbin Duan, Wenying Yao. Texture Generation Method of Three‑Dimensional Model of Crime Scene Based On Multi Panoramic Images[J]. Laser & Optoelectronics Progress, 2022, 59(16): 1611008 Copy Citation Text

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Fig. 1. Triangle P₁P₂P₃

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Fig. 2. Spherical geometry

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Fig. 3. Relation between panoramic image and panoramic sphere. (a) Coordinate system of panoramic image; (b) coordinate system of panoramic sphere

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Fig. 4. Coordinate system of texture image

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Fig. 5. Relation between panoramic image and texture image

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Fig. 6. Mesh to texture map

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Fig. 7. Flow chart of texture generating algorithm

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Fig. 8. Ray occlusion

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Fig. 9. Multi station view fusion

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Fig. 10. Effect before and after occlusion calculation. (a) Before occlusion calculation; (b) after occlusion calculation

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Fig. 11. Before blended

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Fig. 12. After blended

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Fig. 13. Before texture filled

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Fig. 14. After texture filled

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Fig. 15. Vertex shading rendering effect

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Fig. 16. Texture map rendering effect

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Algorithm 2：Generate Texture Image Tith Multi-Panoramas

1： function GenerateTexture（in_triangles，panoramas）

2： texture_image

3： for texture_pixel in texture_image

4： for panorama in panoramas

5： for triangle in in_triangles

6： shelter_state←CaculateShelter（triangle，panorama，texture_pixel）

7： distance_pixel←CaculateDistance（triangle，panorama，texture_pixel）

8： end for

9： end for

10： CaculateFillColor（shelter_states，distance_pixels，texture_pixel）

11： end for

12： return texture_image

13： end function

Table 0. [in Chinese]

Algorithm 1：Caculate Shelter

1： function CaculateShelter（triangle，panorama，texture_pixel）

2： Bool shelter_state←false

3： If（CatculateInTriangle（uv，texture_pixel））then

4： pt←Catculate3DpointOfTecturePixel（in_triangle，texture_pixel）

5： MinDis←CatculateMinDistance（triangle，pt）

6： If（MinDis < Threshold）then

7： Caculate intersection point K of OP and triangle

8： Caculate angle of KO and KP

9： If（angle ≈ π）then

10： shelter_state←true

11： end//if

12： end//if

13： end//if

14： return shelter_state

15：end function

Table 0. [in Chinese]

Algorithm 3：Fill Texture Image

1. function FillTexture（texture_image）

2. texture_image_t←texture_image

3. buildKdtree（texture_image_t）

4. for i in texture_image_t

5. N←KnnSearch（i）

6. CalculateWight（N）

7. CalculateWightColor（N）

8. end for

9. return texture_image_t

10. end function

Table 0. [in Chinese]

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