WO2024016368A1 - Procédé et appareil de génération de ligne d'images en mosaïque guidée par masque, dispositif informatique et support de stockage - Google Patents

Procédé et appareil de génération de ligne d'images en mosaïque guidée par masque, dispositif informatique et support de stockage Download PDF

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Publication number
WO2024016368A1
WO2024016368A1 PCT/CN2022/107692 CN2022107692W WO2024016368A1 WO 2024016368 A1 WO2024016368 A1 WO 2024016368A1 CN 2022107692 W CN2022107692 W CN 2022107692W WO 2024016368 A1 WO2024016368 A1 WO 2024016368A1
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WIPO (PCT)
Prior art keywords
image
mosaic
file
mask
generate
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PCT/CN2022/107692
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English (en)
Chinese (zh)
Inventor
张竹林
熊嘉梁
王晓檀
冯晨轶
农凤情
王振华
周玉巧
李明明
Original Assignee
苏州中科天启遥感科技有限公司
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Publication of WO2024016368A1 publication Critical patent/WO2024016368A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/20—Image preprocessing
    • G06V10/26—Segmentation of patterns in the image field; Cutting or merging of image elements to establish the pattern region, e.g. clustering-based techniques; Detection of occlusion
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V20/00—Scenes; Scene-specific elements
    • G06V20/10—Terrestrial scenes
    • G06V20/13—Satellite images

Definitions

  • the present invention relates to the field of remote sensing data processing, and in particular to a method and device for generating image mosaic lines.
  • the object of the present invention is to provide a mask-guided image mosaic line generation method and device to realize the automatic generation of image mosaic lines and improve the efficiency and accuracy of image mosaic line generation.
  • the present invention proposes a mask-guided generation method of image mosaic lines, which includes:
  • the present invention also proposes a device for generating mask-guided image mosaic lines, which includes:
  • Mask image file generation module used to generate mask image files in standard format
  • the initial mosaic line raster file generation module is used to generate an initial mosaic line raster file based on the merged image range of the image to be mosaic;
  • the marked image file generation module is used to generate a marked image file for each scene of the image to be mounted based on the calculated position of the image range of the image to be mounted in the mask image file;
  • the mosaic line raster file update module is used to segment the image and update the mosaic line raster file based on the mask intersection of any two intersecting images to be mosaic;
  • the pixel value assignment module is used to assign a pixel value to each pixel in the updated mosaic line raster file until all intersecting image traversals complete assignment;
  • the mosaic line vector file generation module is used to vectorize the mosaic line raster file and generate a mosaic line vector file.
  • the present invention also proposes a computer device for generating mask-guided image mosaic lines, including:
  • a processor a memory for storing instructions executable by the processor, and a computer program stored on the memory and executable on the processor. The above method is implemented when the processor executes the program.
  • the present invention also proposes a computer-readable storage medium on which a computer program is stored, characterized in that when the computer program is executed by a processor, the above method is implemented.
  • the method for generating mask-guided image mosaic lines disclosed in the present invention considers any point and neighborhood position points in the mask intersection of the intersection image during the calculation process of generating the image mosaic line. According to the rules established by the pixel value relationship, the adjustment weight of the pixel is obtained, and based on the adjustment weight, the stitching line calculation is performed on the intersection image, a binary mask is generated, and the pixel value of the intersection image during mosaic is obtained, and updated according to the pixel value Mosaic line raster files, so the mosaic lines are more accurate, and because they are self-drawn by a computer program, the generation efficiency is greatly improved.
  • Figure 1 is a flow chart of a mask-guided image mosaic line generation method according to an embodiment of the present invention
  • Figure 2 is a schematic diagram of converting a decoded vector or raster file into a standard mask image file according to an embodiment of the present invention
  • Figure 3a is a schematic diagram of the actual range of the three scene images to be mosaic in the embodiment of the present invention.
  • Figure 3b is a schematic diagram of the circumscribed rectangular range of the three scene images to be mosaic in the embodiment of the present invention.
  • Figure 3c is a schematic diagram of the range of merging images of three scenes to be mosaic in the embodiment of the present invention.
  • Figure 4 is a schematic diagram of the positions of the image range to be mosaic and the local image range in the mosaic line grid file and the mask file in the embodiment of the present invention
  • Figure 5 is a schematic diagram of using a mask to modify the connection weight of the graph cut energy function in an embodiment of the present invention
  • FIG. 6 is a schematic diagram of mosaic lines after assigning different pixel values to the intersection image during mosaic in an embodiment of the present invention.
  • An embodiment of the present invention discloses a method for generating mask-guided image mosaic lines, as shown in Figure 1, which includes the following steps:
  • Step 1 Convert the existing interpretation data into a standard raster format mask image file, including:
  • the format type of the interpreted data If it is a vector format, convert it into a classification system according to the predefined mask image rules, and then rasterize it. If the interpretation data is a raster file and is in a standard format, it will not be processed. If it is not in a standard format, it will be converted into a classification system according to predefined rules to generate a mask image file Mask in a standard raster form.
  • the first column of data SrcClassA ⁇ SrcClassH is the vector data of ground object categories such as buildings, roads, etc.
  • the second column of data SrcValueA ⁇ SrcValueH is the pixel value of the corresponding ground object category
  • the third and fourth columns Convert to a standard format mask raster file.
  • Step 2 Generate an initial mosaic line raster file, as shown in Figures 3a to 3c.
  • the specific method includes:
  • Step 3 Generate labeled image files for each scene to be mosaiced. Specific methods include:
  • the position includes the row and column number of the upper left corner (x tl , y tl ) and the row and column number of the lower right corner (x br , y br );
  • Step 4 Segment the image and update the mosaic line raster file. Specific methods include:
  • Vec(I p ) represents the vector composed of the eigenvalues at point p of the three bands
  • Vec(I p )-Vec(I q ) represents the subtraction of the eigenvalues of the bands corresponding to the two points p and q
  • dot represents two The dot product of vectors
  • ⁇ 3 is an index to evaluate the discreteness of an image.
  • (p, q) ⁇ N L means that q is a point located in the four directions of left, upper left, upper and upper right of point p;
  • step S45 Based on the weight calculated in step S44, use the graph cut algorithm to calculate the splicing line of the intersection area ⁇ ij of the mosaic image img(i) and img(j) to generate the binary mask BinaryMosaic(i,j). If The pixel value of the binary mask BinaryMosaic(i,j) is i, then the area corresponding to the mask uses the pixel value of img(i) when mosaic. On the contrary, if the pixel value of the binary mask BinaryMosaic(i,j) If the pixel value is j, then the area corresponding to the mask will use the pixel value of img(j) when mosaic.
  • Step 5 Write the segmentation results of the pair of images into the initial mosaic line raster file MosaicFile generated in step 2 until each pixel of the mosaic line raster file is assigned a value.
  • the specific steps are:
  • Step 6 Process the next pair of mosaic images according to Step 5 until all intersecting images are traversed and processed.
  • Step 7 Perform vectorization processing on the mosaic line raster file, generate a mosaic line vector file, and obtain the mosaic line of the image.
  • GDALPolygonize function provided by GDAL (Geospatial Data Abstraction Library) to vectorize the mosaic line raster file MosaicFile, generate the mosaic line vector file MosaicShp, and obtain the mosaic line of the image.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Astronomy & Astrophysics (AREA)
  • Remote Sensing (AREA)
  • Image Processing (AREA)

Abstract

L'invention concerne un procédé et un appareil de génération de ligne d'images en mosaïque guidée par masque, un dispositif informatique et un support de stockage. Le procédé consiste à : générer un fichier d'images masque et un fichier de trames de lignes en mosaïque initial ; calculer les positions de plages d'images à former en mosaïque, lesquelles positions sont dans le fichier d'images masque, et générer un fichier d'images marqué de chacune desdites images ; selon une intersection de masque de deux quelconques desdites images qui ont une intersection entre elles, diviser lesdites images et mettre à jour le fichier de trames de lignes en mosaïque ; attribuer une valeur de pixel à chaque pixel dans le fichier de trames de lignes en mosaïque jusqu'à ce que la traversée de toutes les images d'intersection soit achevée ; et vectoriser le fichier de trames de lignes en mosaïque, de façon à générer un fichier de vecteurs de lignes en mosaïque. Le procédé améliore l'efficacité et la précision de génération de lignes d'images en mosaïque.
PCT/CN2022/107692 2022-07-21 2022-07-25 Procédé et appareil de génération de ligne d'images en mosaïque guidée par masque, dispositif informatique et support de stockage WO2024016368A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210865265.2A CN115170685A (zh) 2022-07-21 2022-07-21 一种掩膜引导的影像镶嵌线的生成方法、装置、计算机设备及存储介质
CN202210865265.2 2022-07-21

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WO2024016368A1 true WO2024016368A1 (fr) 2024-01-25

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109087373A (zh) * 2018-07-06 2018-12-25 航天星图科技（北京）有限公司 一种大规模遥感数据网络拼接线自动生成方法
CN110866869A (zh) * 2019-10-28 2020-03-06 苏州中科天启遥感科技有限公司 结合泰森多边形与最小生成树图像分割的影像镶嵌方法及装置
CN111311750A (zh) * 2020-01-17 2020-06-19 武汉大学 一种基于约束三角网的镶嵌线网络全局优化方法
US20200342655A1 (en) * 2019-04-29 2020-10-29 Wuhan University Method and system for vector-raster overlay analysis of ground surface image area based on edge clipping
CN112508988A (zh) * 2021-01-14 2021-03-16 西安中科星图空间数据技术有限公司 一种遥感影像镶嵌线精确提取方法及装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109087373A (zh) * 2018-07-06 2018-12-25 航天星图科技（北京）有限公司 一种大规模遥感数据网络拼接线自动生成方法
US20200342655A1 (en) * 2019-04-29 2020-10-29 Wuhan University Method and system for vector-raster overlay analysis of ground surface image area based on edge clipping
CN110866869A (zh) * 2019-10-28 2020-03-06 苏州中科天启遥感科技有限公司 结合泰森多边形与最小生成树图像分割的影像镶嵌方法及装置
CN111311750A (zh) * 2020-01-17 2020-06-19 武汉大学 一种基于约束三角网的镶嵌线网络全局优化方法
CN112508988A (zh) * 2021-01-14 2021-03-16 西安中科星图空间数据技术有限公司 一种遥感影像镶嵌线精确提取方法及装置

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