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Car light close-range photogrammetry method

A measurement method and technology of close-up photography, applied in the direction of photo interpretation, etc., can solve the problems of inability to realize photogrammetry process, difficulty in rapid, high-precision measurement, etc.

Inactive Publication Date: 2005-06-22
HASCO VISION TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, when it is applied to objects with optical reflective surfaces such as car lights, it is usually impossible to realize the photogrammetry process due to the inability to use methods such as projection to set special marks
Moreover, due to the limitation of the number of photographic pixels and the speed of image storage, it is difficult to achieve fast and high-precision measurement at the same time.

Method used

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  • Car light close-range photogrammetry method

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Embodiment Construction

[0006] In the figure, four photographic devices 1 placed in pairs perpendicular to each other are arranged. This is because the adjacent points cannot be distinguished on the image, but when the angle between the edge line and the photographic baseline is greater than 45 degrees and the measurement point is in the vertical It can be distinguished in the spatial plane of the edge, and every two perpendicular to each other is a group. After shooting, only the measurement points with an angle greater than 45 degrees are processed, that is, there is only one group of left and right images for a certain point. The photographic baselines of the two groups of photographic devices 1 are perpendicular to each other, and each group of photographic devices 1 is used to measure the measurement point 3 on the edge of the car light 2 when the angle between the two groups of photographic devices 1 is relatively large; The four images of the four images are recorded as the first group of left ...

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Abstract

This invention relates to a test method for a car lamp site camera characterizing in using four camera devices vertical in pairs in two sets, their basic lines are vertical, the devices test the test points on the lamp edges when a large included angle with their basic lines is formed. Two sets of cameras get four images of the standard edge mark points, and get four images of under-test lamps placed at the same position with the standard to get the left image coordinate of the test point by comparing the left images of the standard and the under-test lamp and get the coordinate of the right image by comparing the right, then to get the special coordinate by computing them.

Description

technical field [0001] The invention relates to a photogrammetry method, in particular to a close-range photogrammetry method for vehicle lights. Background technique [0002] At present, in the mass production of car lights, the requirement of positioning and detecting the shape of car lights is put forward to achieve the matching between the shape of car lights and the body. Due to the slow detection speed, traditional manual positioning and assembly inspection devices can only conduct sampling inspections on car lights. Moreover, different inspection devices need to be prepared for each different type of car lights, and the inspection cost is high. Although other size detection devices such as three-coordinate instruments have high measurement accuracy, they still have slow detection speed and are not dedicated, so it is difficult to use them for quasi-on-line rapid detection. The digital close-range photogrammetry system can realize the universal, fast and non-contact a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C11/04
Inventor 顾毓华朱德忠徐小平朱正清冯昱华
Owner HASCO VISION TECHNOLOGY CO LTD
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