3 SYSTEM AND METHOD FOR 3 DIMENSIONAL IMAGING USING STRUCTURED LIGHT

The present invention relates to a three-dimensional imaging method using structure light and a system thereof wherein, more specifically, the system of the three-dimensional imaging method using structure light converts light, emitted by a light source, into structure light by using a grid pattern...

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Bibliographische Detailangaben
Hauptverfasser: AHN, JAE SUNG, JUNG, HONG LYEL, PARK, AN JIN, EOM, JOO BEOM
Format: Patent
Sprache:eng ; kor
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Zusammenfassung:The present invention relates to a three-dimensional imaging method using structure light and a system thereof wherein, more specifically, the system of the three-dimensional imaging method using structure light converts light, emitted by a light source, into structure light by using a grid pattern filter. The structure light is emitted to an object by using a variable lens. Reflected light, generated as the structure light emitted into the object is reflected by the object, is obtained. The structure light is separated from the reflected light and only the reflected light is transmitted to an image acquisition device. A focus variable image is obtained by the image acquisition device by adjusting the variable lens. A depth image for the surface of the object is generated from the focus variable image. Three-dimensional information of the object is obtained by converting the depth image into point cloud. A pattern is removed by applying a low pass filter to the focus variable image. A corrected color is obtained from a color before correction by using second order polynomial correction. Shape information and color information of the object can be obtained at the same time by the method of pattern removal and color correction. 본 발명은 구조광을 이용한 3차원 이미징 방법 및 시스템에 관한 것으로, 보다 구체적으로는 광원에서 발산된 빛을 격자무늬 패턴 필터를 이용하여 구조광으로 변화시킨다. 구조광을 가변 렌즈를 이용하여 대상물에 조사하고, 대상물에 입사한 구조광이 대상물에 의해 반사되어 생기는 반사광을 얻는다. 반사광에서 구조광을 분리하여, 반사광만 영상획득 장치로 보내고, 가변 렌즈를 조절하여 영상획득 장치에서 초점 가변 영상을 획득한다. 초점 가변 영상으로부터 대상물의 표면에 대한 깊이 영상을 생성하고, 깊이 영상을 포인트 클라우드(Point Cloud)로 변환하여 대상물에 대한 3차원 정보를 획득한다. 초점 가변 영상에 저역 통과 필터를 적용하여 패턴을 제거하고, 보정전 색상을 2차 다항식 보정을 이용하여 보정 색상을 얻는다. 이러한 패턴 제거 및 색상 보정 방법을 통해 대상물의 형상정보와 색상정보를 동시에 획득할 수 있다.