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Fresnel lens center positioning method based on Opencv

A Fresnel lens, center positioning technology, used in image enhancement, image analysis, instruments, etc., can solve problems such as unfavorable mass production, different lens mold threads, and different Fresnel lens center points, etc., to save money. time, increase production efficiency, increase the effect of production capacity

Pending Publication Date: 2022-05-13
QILU UNIV OF TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

However, a single piece of acrylic plate can be cast to form multiple Fresnel lenses. Different Fresnel lenses on the acrylic plate use different molds, so the center of the thread of the lens mold is also different, resulting in the Fresnel lens after casting. The center point is different
The existing method of locating the center point of the Fresnel lens is to observe the mark with the naked eye and provide the center coordinates for the subsequent cutting of the Fresnel lens on the acrylic plate, which is unfavorable for industrial mass production

Method used

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  • Fresnel lens center positioning method based on Opencv
  • Fresnel lens center positioning method based on Opencv

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Embodiment Construction

[0030] Attached below figure 1 The present invention will be further described.

[0031] A method for positioning the center of a Fresnel lens based on Opencv, comprising the steps of:

[0032] a) Use a high-definition color camera to shoot the cast acrylic plate, and get the original image A with RGB three channels. An acrylic plate is cast and pressed to make N pieces of Fresnel lenses, and a horizontal axis positioning above the acrylic plate points and N vertical axis positioning points arranged at intervals along the vertical direction on the edge of the acrylic plate, and the original image A has N+1 positioning points.

[0033] b) Preprocessing the original image A to obtain a preprocessed image B.

[0034] c) In order to reduce the noise and detail level of the preprocessed image B, perform Gaussian blur on the preprocessed image B to obtain the filtered image C.

[0035] d) Perform grayscale transformation on the filtered image C to obtain a single-channel grayscal...

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Abstract

According to the Fresnel lens center positioning method based on the Opencv, compared with manual marking of the center point of the Fresnel lens, automatic positioning of the center point of the Fresnel lens is achieved based on the Opencv, time is saved, production efficiency is improved, and production capacity is improved. Detection of a first link of automatic production of the Fresnel lens is realized based on central point positioning of the Fresnel lens of Opencv, and returned coordinates can be supplied to a mechanical arm to execute subsequent cutting and other tasks.

Description

technical field [0001] The invention relates to the field of machine vision, in particular to an Opencv-based Fresnel lens center positioning method. Background technique [0002] The main principle of producing photovoltaic Fresnel lenses and projection Fresnel lenses in the industrial field is to use Fresnel lens molds to cast acrylic plates at high temperatures to form Fresnel lenses on acrylic plates. However, a single piece of acrylic plate can be cast to form multiple Fresnel lenses. Different Fresnel lenses on the acrylic plate use different molds, so the center of the thread of the lens mold is also different, resulting in the Fresnel lens after casting. The location of the center point is different. The existing way of locating the center point of the Fresnel lens is to observe the mark with the naked eye and provide the center coordinates for the subsequent cutting of the Fresnel lens on the acrylic plate, which is unfavorable for industrial mass production. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T7/11G06T7/136G06T7/149G06T7/62G06T7/66G06F17/16G06F17/11
CPCG06T7/11G06T7/149G06T7/136G06T7/62G06T7/66G06F17/16G06F17/11G06T5/70
Inventor 庞少鹏李家豪李广良
Owner QILU UNIV OF TECH