Active texture method for linear array binocular 3D imaging

Abstract

Embodiments of the invention disclose an active texture method for linear array binocular 3D imaging. The active texture method comprises the following steps: receiving an external trigger control signal with frequency of 2f, generating a first trigger signal with frequency of f and a second trigger signal with frequency of 2f according to the external trigger control signal, and projecting progressively increasing grating stripe light to a photographed object by a 1 / f periodic trigger structure layer according to the first trigger signal; collecting the photographed object by a 1 / 2f periodic trigger camera according to the second trigger signal; and outputting an original image in which images having grid textures and images having no grid textures are alternatively arranged. According to the active texture method disclosed by the invention, the textures of the progressively increasing grating stripe light have the advantages of high brightness and obvious architectural features and can satisfy the requirements on matching features in 3D information calculation; and in addition, in the output original image, the images having grid textures and the images having no grid textures are alternatively arranged, so that by separating the original image, complete 2D images having no grid textures and complete images containing the matching features and having the grid textures can be obtained.

Description

technical field [0001] The invention relates to the technical field of 3D imaging systems, in particular to an active texture method for linear array binocular 3D imaging. Background technique [0002] With the rapid development of industrial automation, the industrial application of machine vision systems is becoming more and more common. In the field of machine vision, linear array binocular 3D cameras are a special type of vision machine. Compared with area array binocular 3D cameras, its sensor has only one row of photosensitive elements, thus making high scanning frequency and high resolution possible. The typical application field of line array cameras is to detect continuous materials. The object to be inspected usually moves at a constant speed, and one or more linear array binocular 3D cameras are used to continuously scan it line by line to achieve uniform detection of its entire surface. [0003] However, the lack of matching features has always been a problem i...

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Problems solved by technology

[0005] An embodiment of the present invention provides an active texture method for linear array binocular 3D imaging to solve the problem that the structured light projected by a projector cannot meet the requirements for matching feature information analysis due to low brightness in the prior art, and The problem that the structured light will destroy the original 2D image

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