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Measuring method for acquiring geometrical information of police case shot by CCD cooperating with iPad

A technology of geometric information and cases, applied in the field of rapid processing of public security cases, to achieve the effects of easy implementation, convenient processing methods, and simple principles

Active Publication Date: 2016-01-06
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the limitations and hysteresis of the current manual survey method and solve the problem of on-site processing of public security cases, the purpose of the present invention is to provide a measurement method for obtaining geometric information of public security cases with CCD and iPad photography

Method used

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  • Measuring method for acquiring geometrical information of police case shot by CCD cooperating with iPad
  • Measuring method for acquiring geometrical information of police case shot by CCD cooperating with iPad
  • Measuring method for acquiring geometrical information of police case shot by CCD cooperating with iPad

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Embodiment Construction

[0022] Using CCD with iPad photography to process the scene of public security cases has greatly improved in terms of processing efficiency and manual work intensity, as well as post-site measurement and file preservation, providing a new way to handle public security cases method, specifically:

[0023] 1) Since the ground of the public security case scene is partially flat, according to the situation of the case scene, the photographic observation point S is selected, such as figure 1 As shown, the case scene is photographed with a CCD lens and an iPad single-chip upright photography method to ensure that the size of the object of the case, the traces of the accident left behind, and the scattered evidence of the case can be photographed at the observation point;

[0024] 2) if figure 2 As shown, a foldable two-section fixed-length sign post is placed horizontally on the ground of the public security case scene, wherein, 1 and 2 are the two ends of the folded sign post, an...

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Abstract

The invention discloses a measuring method for acquiring geometrical information of police case shot by CCD cooperating with iPad. The measuring method includes performing a rapid processing for scene of police case rapidly and acquiring the useful key information of the case by using photography of CCD cooperating with iPad; performing close normal case single image photogrammetry for the object to be measured by making full use of the characteristic that the part of the case ground is plane, determining the ground elevation Z0 and the focal length f when shot by CCD lens based on three characteristic points including two breakpoints and one salient point on a folding marker post and two fixed length L1, L2 of the folding marker post; calculating coordinates of the corresponding points in object space (Xi, Yi, Zi) based on the ground elevation Z0, the focal length f when shot by CCD lens and the coordinates of the corresponding characteristic points in image space, furthermore calculating the relationship between the geometrical information which is useful for detecting the case and the deviation position. The result can be used for the key basis to detect the police case.

Description

1. Technical field [0001] The invention relates to a fast processing method for public security cases, in particular to a measurement method for obtaining geometric information of public security cases by cooperating with CCD and iPad photography. 2. Technical background [0002] The traditional method of handling public security cases mainly adopts the method of manual on-the-spot investigation, using tools such as meter sticks and chalk to measure and mark the case scene, but in actual operation and case processing, the shortcomings and limitations of manual investigation methods are becoming more and more Obviously, it has brought a lot of trouble and inconvenience to the efficient and fast handling of public security cases: [0003] ① When the traditional manual investigation method is used to handle public security cases, it takes a long time, and the scene of the crime cannot be cleared quickly, delaying the time of the parties and other personnel, and even easily caus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C11/00
CPCG01C11/00
Inventor 冯仲科刘金成
Owner BEIJING FORESTRY UNIVERSITY
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