A camera-based size measurement method and device
A camera and size technology, applied in the field of measurement, can solve the problems of low reliability and inaccurate measurement results of geometric dimensions, and achieve the effect of high reliability
Active Publication Date: 2018-09-14
COOLPAD SOFTWARE TECH (SHENZHEN) CO LTD
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Problems solved by technology
[0003] However, in practical applications, since the geometric size of the object read based on the optical ruler is the projection size of the actual size of the object on the camera plane, when the object is not perpendicular to the optical axis of the lens center of the camera, it is easy to cause The measurement result of the object's geometric size is inaccurate, and the reliability is low
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[0061] The technical solution in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0062] Embodiments of the present invention provide a camera-based size measurement method and device, which can effectively measure the geometric size of an object with high reliability. Each will be described in detail below.
[0063] see figure 1 , figure 1 It is a schematic flow chart of a camera-based size measurement method provided by the present invention, specifically, figure 1 The illustrated sizing method may include the following steps.
[0064] S101: Determine a target object ...
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The invention relates to the technical field of measurement, and discloses a size measuring method and device based on a camera. The method comprises the steps of determining a target object of which the size is to be measured from a target image; reading focus corresponding to the target image, wherein the target image is obtained through the camera preset at a terminal; acquiring the first projection size of the target object in the direction parallel to an central optical axis of the camera according to the focus; acquiring the second projection size of the target object in the plane vertical to the central optical axis of the camera according to the focus; calculating to obtain the size of the target object according to the first projection size and the second projection size. With the adoption of the method, the geometric dimension of the object can be effectively measured, and the reliability is high.
Description
technical field [0001] The invention relates to the field of measurement technology, in particular to a camera-based size measurement method and device. Background technique [0002] With the improvement of people's living standards, it is no longer possible to obtain the shape image of an object only through a camera, and users often want to obtain the geometric size of the object. For example, with the introduction of the concept of an optical ruler, when it is necessary to measure the length of an object, the user can take a picture of the object through the camera on the terminal, and generate a "ruler" on the terminal display screen according to the law of focal length and imaging, thereby According to the reading of the "ruler", the length and other geometric dimensions of the object can be obtained. [0003] However, in practical applications, since the geometric size of the object read based on the optical ruler is the projection size of the actual size of the objec...
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IPC IPC(8): G01B11/00
Inventor 高秀文何龙华
Owner COOLPAD SOFTWARE TECH (SHENZHEN) CO LTD