DSM automatic comparison system based on aerial photography measurement

Abstract

The invention discloses a DSM automatic comparison system based on aerial photography measurement, and belongs to the technical field of aerial photography measurement. The system comprises an elevation extraction module, an elevation conversion module, a layer superposition module and a comparison labeling module; the elevation extraction module is used for extracting elevation data of the two stages of aerial photos processed by the aerial photo processing module; the elevation conversion module is used for converting the elevation data of the two-stage aerial photo extracted by the elevation extraction module into a vector layer; the layer superposition module is used for performing superposition processing on vector layers of the two stages of aerial photos; the comparison labeling module is used for labeling areas with changes in the two-stage aerial photo vector layers. According to the invention, the method is scientific and reasonable, is suitable for large-scale aerial photo inspection and comparison, greatly shortens the inspection and comparison time, greatly reduces the manpower investment, can more accurately discover the existence of illegal buildings, is higher in comparison pertinence, and can achieve the effect of screening buildings with different areas through the adjustment of various numerical values.

Description

technical field [0001] The invention relates to the technical field of aerial photography measurement, in particular to a DSM automatic comparison system based on aerial photography measurement. Background technique [0002] Aerial measurement refers to the use of drones and aerial cameras to take aerial photos of a certain area, and to make statistics and understand the buildings in the area through the aerial photos, and to compare the aerial photos with the corresponding aerial photos of the area in the past By comparison, you can confirm the illegal buildings in the area, and you can clearly understand whether there is any illegal use of national land; [0003] At present, the inspection and comparison mainly uses the orthophoto aerial photos of two phases to detect illegal construction and other behaviors through manual identification. Due to the limitations of manual identification, the results of the inspection and comparison have the following shortcomings: [0004]...

AI Technical Summary

Problems solved by technology

[0004] 1. Low efficiency. For large-scale inspection and comparison, the efficiency of manual identification is low;

[0005] 2. There are many omissions, and manual comparison is easy to miss some small and unobvious illegal buildings;

[0006] 3. The quality requirements for orthophoto images are high, and very clear orthophoto images are required for inspection and comparison;

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