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

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

Meng Liu1、*, 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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    AbstractGet PDF(in Chinese)
    Figures&Tables (19)
    Equations (8)
    References (23)
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    Paper Information
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    Figures & Tables(19)
    Triangle P1P2P3

    Fig. 1. Triangle P1P2P3

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    Spherical geometry

    Fig. 2. Spherical geometry

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

    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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    Coordinate system of texture image

    Fig. 4. Coordinate system of texture image

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    Relation between panoramic image and texture image

    Fig. 5. Relation between panoramic image and texture image

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    Mesh to texture map

    Fig. 6. Mesh to texture map

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    Flow chart of texture generating algorithm

    Fig. 7. Flow chart of texture generating algorithm

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    Ray occlusion

    Fig. 8. Ray occlusion

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    Multi station view fusion

    Fig. 9. Multi station view fusion

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

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

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    Before blended

    Fig. 11. Before blended

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    After blended

    Fig. 12. After blended

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    Before texture filled

    Fig. 13. Before texture filled

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    After texture filled

    Fig. 14. After texture filled

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    Vertex shading rendering effect

    Fig. 15. Vertex shading rendering effect

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    Texture map rendering effect

    Fig. 16. Texture map rendering effect

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    • Table 0. [in Chinese]

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      Table 0. [in Chinese]

      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]

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      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]

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      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

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    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

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    Paper Information

    Category: Imaging Systems

    Received: Sep. 23, 2021

    Accepted: Nov. 1, 2021

    Published Online: Jul. 22, 2022

    The Author Email: Liu Meng (liumeng@zjjcxy.cn)

    DOI:10.3788/LOP202259.1611008

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology