KR20050008245A - An apparatus and method for inserting 3D graphic images in video - Google Patents
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Abstract
본 발명은 동영상의 3차원 그래픽 영상 합성 장치 및 그 방법에 관한 것으로서, 사용자 인터페이스부와, 모션 분석부와, 영상합성부와, 영상 저장부와, 영상출력부를 포함하고, 프레임들의 흐름인 동영상신호가 입력되면 그 동영상신호를 분석하여 장면이 전환된 프레임에 대한 정보인 장면전환영상정보를 검출하는 과정과, 외부로부터 합성영상의 합성영역정보를 전달받아 상기 검출된 장면전환영상정보에 해당되는 프레임 및 그 프레임 이후로 입력되는 프레임들 중 상기 합성영역정보에 해당되는 합성영역을 포함하는 모든 프레임들 각각에 대한 특징정보에 의거하여 카메라 모션 정보를 도출하는 과정과, 외부로부터 3차원 합성영상을 전달받아 상기 과정에서 도출된 모션정보에 의거하여 상기 동영상 신호 및 3차원 합성영상을 합성하는 과정과, 상기 3차원 합성영상을 저장하고, 출력하는 과정을 수행함으로써, 가상의 3차원 영상을 실제 동영상 내에 보다 효과적으로 합성할 수 있다는 효과가 있다. 이로 인해, 단순한 촬영으로 이루어진 동영상에 부가적인 효과를 극대화시킬 수 있다.The present invention relates to a 3D graphic image synthesizing apparatus and method for moving image, comprising a user interface unit, a motion analysis unit, an image synthesis unit, an image storage unit, an image output unit, and a video signal that is a flow of frames. Is inputted, analyzing the video signal to detect scene change image information, which is information on a frame to which a scene has been changed, and receiving a composition region information of a synthesized image from the outside, and receiving a frame corresponding to the detected scene change image information. And deriving the camera motion information based on the feature information of each of the frames including the synthesis region corresponding to the synthesis region information among frames input after the frame, and transmitting the 3D composite image from the outside. Receiving and synthesizing the video signal and the 3D composite image based on the motion information derived in the process; By storing the group 3-D composite image, and performs a process for outputting, there is an effect that it can effectively synthesize the three-dimensional image of the virtual than within the actual video. Because of this, it is possible to maximize the additional effect on the video consisting of a simple shooting.
Description
본 발명은 동영상의 3차원 그래픽 영상합성장치 및 그 방법에 관한 것으로서, 특히, 일반적인 동영상에서 하드웨어적인 도움 없이 그 동영상의 카메라 모션을 고려하여 자연스럽게 3차원 그래픽 영상과 동영상을 합성할 수 있도록 하는 동영상의 3차원 그래픽 영상합성장치 및 그 방법에 관한 것이다.The present invention relates to a 3D graphic image synthesizing apparatus and a method thereof for moving images. In particular, a video for synthesizing a 3D graphic image and a video naturally in consideration of the camera motion of the video without hardware assistance in a general video. A three-dimensional graphic image synthesizing apparatus and a method thereof are provided.
기존의 동영상 편집이나, 영상합성 등의 동영상처리기술은 축구장, 테니스장 또는 야구장과 같은 스포츠 영상과 같이 규격화된 필드가 존재하는 동영상에 국한된 것이 일반적이다.Existing video processing techniques such as video editing and video synthesis are generally limited to video having standardized fields such as sports video such as soccer field, tennis court or baseball field.
따라서, TV 드라마나 영화 등과 같은 동영상을 처리하기 위해서는 스포츠영상에서 사용된 추적방법보다 훨씬 복잡한 추적방법이 적용되어야만하며, 동영상 처리를 하드웨어에 의존하는 경우 보다 정확한 동영상 처리를 위해 고비용의 장치를 이용하여야 했다.Therefore, in order to process video such as TV drama or movie, a more complicated tracking method has to be applied than the tracking method used in sports video, and if the video processing is dependent on hardware, an expensive device must be used for more accurate video processing. did.
본 발명은 상기한 바와 같은 종래의 문제점을 해결하기 위하여 안출된 것으로서, 본 발명의 목적은 일반적인 동영상에서 하드웨어적인 도움 없이 그 동영상의 카메라 모션을 고려하여 자연스럽게 3차원 그래픽 가상영상과 동영상을 합성할 수 있도록 하는 동영상의 3차원 그래픽 영상합성장치 및 그 방법을 제공하는 데에 있다.The present invention has been made to solve the conventional problems as described above, the object of the present invention is to synthesize a 3D graphic virtual video and a video naturally in consideration of the camera motion of the video without the help of hardware in general video The present invention provides a 3D graphic image synthesizing apparatus and method thereof.
도 1은 본 발명의 실시예에 따른 동영상의 3차원 그래픽 영상합성장치에 대한 블록도,1 is a block diagram of a 3D graphic image synthesizing apparatus of a video according to an embodiment of the present invention;
도 2은 본 발명의 실시예에 따른 영상합성부에 대한 개략적인 블록도,2 is a schematic block diagram of an image synthesizer according to an embodiment of the present invention;
도 3는 본 발명의 실시예에 따른 동영상의 영상합성방법에 대한 처리 흐름도,3 is a flowchart illustrating a method of synthesizing an image according to an embodiment of the present invention;
도 4은 본 발명의 실시예에 따른 3차원 그래픽 영상합성 과정시 합성영역에 대한 좌표계 생성에 관한 개략도.4 is a schematic diagram of generating a coordinate system for a synthesis region in a 3D graphic image synthesis process according to an embodiment of the present invention.
도 5은 에피폴라 기하학을 이용한 에센셜 행렬로 부터의 카메라 모션 파라미터의 추출을 나타내는 도면.5 shows the extraction of camera motion parameters from an essential matrix using epipolar geometry.
상기 목적을 달성하기 위한 본 발명의 동영상의 3차원 그래픽 영상합성장치는 연속적인 프레임들의 흐름인 동영상신호를 입력하는 동영상 입력부와, 상기 동영상신호를 구성하는 프레임들의 소정영역에 소정의 합성영상을 합성하기 위해 사용자와의 인터페이스를 수행하는 사용자 인터페이스부와, 상기 사용자 인터페이스부로부터 사용자가 선택한 합성영역정보를 전달받고, 프레임들 각각의 특징정보에의거하여, 카메라의 모션 정보를 도출하는 모션 분석부와, 상기 사용자 인터페이스부로부터 사용자가 합성하고자 하는 3차원 합성영상 및 3차원 합성영역정보를 전달받고, 상기 동영상신호와 상기 합성영상을 합성한 합성영상을 생성하는 영상합성부와, 상기 영상합성부로부터 합성영상을 전달받아 그 합성영상을 동영상신호로 저장하는 영상 저장부와, 상기 합성영상에 대한 동영상신호를 출력하는 영상출력부를 포함하는 것을 특징으로 한다.In order to achieve the above object, a 3D graphic image sum growth value of a moving image of the present invention synthesizes a moving image input unit for inputting a moving image signal which is a flow of consecutive frames, and a predetermined composite image in a predetermined region of the frames constituting the moving image signal. A user interface unit for performing an interface with a user, a motion analysis unit for receiving composite region information selected by the user from the user interface unit, and deriving motion information of a camera based on feature information of each frame; An image synthesizer configured to receive a 3D synthesized image and 3D synthesized region information to be synthesized by a user from the user interface unit, and generate a synthesized image obtained by synthesizing the video signal and the synthesized image; Image save that receives a composite video and saves it as a video signal It characterized in that it comprises a unit, image output unit for outputting a video signal for the composite image.
한편, 상기 목적을 달성하기 위한 본 발명의 동영상 합성방법은 연속적인 프레임들의 흐름인 동영상신호가 입력되면, 그 동영상신호를 분석하여 외부로부터 합성영상의 합성영역정보를 전달받아, 입력되는 프레임들 중 상기 합성영역정보에 해당되는 합성영역을 포함하는 모든 프레임들 각각에 대한 특징정보에 의거하여 카메라 모션 정보를 도출하고, 외부로부터 3차원 합성영상을 전달받아, 상기 과정에서 도출된 모션정보에 의거하여, 상기 동영상 신호 및 3차원 합성영상을 합성하는 과정과, 상기 3차원 합성영상을 저장하고, 출력하는 과정을 포함하는 것을 특징으로 한다.On the other hand, the video synthesis method of the present invention for achieving the above object, if a video signal that is a flow of a continuous frame is input, by analyzing the video signal received from the outside of the synthesis region information of the synthesized image, of the input frame The camera motion information is derived based on the feature information of each of the frames including the synthesis region corresponding to the synthesis region information, the 3D composite image is received from the outside, and based on the motion information derived in the process. And synthesizing the video signal and the 3D composite image, and storing and outputting the 3D composite image.
도 2는 본 발명의 실시예에 따른 영상합성부(200)에 대한 개략적인 블록도이다. 도 2를 참조하면, 본 발명의 영상합성부(200)는 3차원 영상 합성 영역 변환 정보검출부(210), 영상처리부(220) 및 영상효과부(230)를 포함한다.2 is a schematic block diagram of an image synthesizer 200 according to an exemplary embodiment of the present invention. Referring to FIG. 2, the image synthesizer 200 includes a 3D image synthesis region transformation information detector 210, an image processor 220, and an image effector 230.
3차원 영상 합성 영역 변환 정보 검출부(210)는 사용자 인터페이스부('도 1'의 600)를 통해 입력되는 합성영역의 위치정보를 통해 그 합성영역내의 원근변화율정보를 검출한다. 3차원 영상 합성 영역 변환 정보 검출부(210)에서는 다양한 원근변화율정보를 검출하기 위해 다양한 기준점을 이용한다. 예를 들어, 특징정보 추출시에 이동(Translation)이나 회전(Rotation) 변환이 일어나면 두 개의 기준점이 필요하고, 어파인(Affine) 변환이 일어날 경우에는 세 개의 기준점이 필요하고, 투영(Perspective) 변환이 일어날 경우에는 네 개의 기준점을 필요로 한다. 이 때, 각 점의 위치정보를 이용하여 원근변화율 정보를 검출하는 방법은 영상처리 분야에서 이미 공지된 기술이므로 구체적인 설명을 생략한다.The 3D image synthesis region transformation information detector 210 detects perspective change rate information in the synthesis region through position information of the synthesis region input through the user interface unit 600 of FIG. 1. The 3D image synthesis region transformation information detector 210 uses various reference points to detect various perspective change rate information. For example, two reference points are required if a translation or rotation transformation occurs when extracting feature information, and three reference points are required if an affine transformation occurs, and a perspective transformation is required. If this happens, four reference points are required. In this case, the method of detecting the perspective change rate information using the location information of each point is already known in the field of image processing, and thus a detailed description thereof will be omitted.
영상처리부(220)는 동영상을 입력받고, 모션 분석정보를 입력받고, 합성영상을 전달받고, 원근변화율정보를 전달받아 동영상신호의 해당영역에 3차원 합성영상을 합성한 3차원 합성영상을 생성한다.The image processor 220 receives a video, receives motion analysis information, receives a composite image, receives perspective change rate information, and generates a 3D synthesized image obtained by synthesizing a 3D synthesized image in a corresponding region of the video signal. .
영상효과부(230)는 영상처리부(220)에서 생성된 합성영상에 대한 흐림 및 그림자 처리를 수행한다.The image effect unit 230 performs blur and shadow processing on the synthesized image generated by the image processor 220.
도 3는 본 발명의 실시예에 따른 동영상의 영상합성방법에 대한 처리 흐름도이다. 도 3를 참조하면, 본 발명의 실시예에 따른 동영상의 영상합성방법은 외부로부터 합성영상의 합성영역정보를 전달받아(310), 3차원 영상 합성을 위한 3차원 합성 영역 좌표계를 산출해 낸다(320). 이를 상기 합성영역정보에 해당되는 합성영역을 포함하는 모든 프레임들 각각에 대한 특징정보에 의거하여 카메라 모션 정보를 도출한다(330). 그리고 이 카메라 모션 정보로부터 합성 영역 내의 원근 변화율 정보를 추출해(340), 외부로부터 입력된 합성영상을 전달받아, 상기 과정에서 도출된 모션정보에 의거하여, 동영상 신호 및 합성영상을 합성한다.(350)3 is a flowchart illustrating a method of synthesizing an image according to an embodiment of the present invention. Referring to FIG. 3, the image synthesis method according to an embodiment of the present invention receives the synthesis region information of the synthesized image from the outside (310), and calculates a 3D synthesis region coordinate system for synthesizing the 3D image ( 320). The camera motion information is derived based on the feature information of each of the frames including the synthesis region corresponding to the synthesis region information (330). The perspective change rate information in the synthesis region is extracted from the camera motion information (340), and the composite image input from the outside is received, and the video signal and the synthesized image are synthesized based on the motion information derived in the process. )
도 4은 본 발명의 실시예에 따른 3차원 그래픽 영상합성 과정시 합성영역에대한 좌표계 생성에 관한 개략도이다. 3차원 그래픽 영상 합성 영역은 사용자가 입력한 점들(460)로 둘러 쌓인 영역에서의 최외접 사각형의 한 변(430)들과 일대일 대응관계에 있다고 보고, 3차원 그래픽 영상 합성 영역의 한 변(440)은 3차원 공간상의 한 변(450)이 정사영된 것으로 추정할 수 있다. 이것은 최외접 사각형의 한변(430)의 노름과 3차원 공간상의 한 변(450)의 노름이 같다는 가정하에서 아래와 같은 식에 따라서 그래픽 영상 합성영역위에 3차원 좌표계를 계산해 낼 수 있다.4 is a schematic diagram of generating a coordinate system for a synthesis region in a 3D graphic image synthesis process according to an embodiment of the present invention. The 3D graphic image synthesis region is considered to have a one-to-one correspondence with one side 430 of the outermost quadrangle in the area surrounded by the points 460 input by the user, and one side 440 of the 3D graphic image synthesis region. ) Can be assumed to be orthogonal projection of one side 450 in three-dimensional space. This is assuming that the norm of one side 430 of the outermost quadrangle and the norm of one side 450 in three-dimensional space are the same.
: 3차원 그래픽 영상 삽입 영역의 외접사각형 변 벡터(430) : An lateral rectangle vector of a 3D graphic image insertion region (430)
: 3차원 그래픽 영상 삽입 영역의 변 벡터,이 정사영된 벡터(440) : Side vector of 3D graphic image insertion area, This Orthogonal Vector (440)
:로 정사영된 원래의 벡터(450) : The original vector (450)
: 3차원 회전 행렬 : 3-D Rotation Matrix
: 벡터의 x,y,z축의 3차원 좌표 Vector Three-dimensional coordinates of the x, y, and z axes of
: 3차원 그래픽 영상 삽입 영역의 꼭지점 좌표(460) : Vertex coordinates of the 3D graphic image insertion area (460)
또한, 도 5에서와 같이 에피폴라 기하학(Epipolar Geometry)을 이용한 연속단위영상(510)에서의 카메라 모션을 추출해 낼 수 있다. 참고로, 에피폴라 기하학(Epipolar Geometry)이란 양안 카메라를 이용해 3차원 상의 피사체의 한점을 왼쪽 카메라로 사영시켰을때, 반드시 그 점은 오른쪽 카메라에도 사영된다는 가정에서 출발하는 기하학을 말한다. 즉, 이 발명에서는 3차원상의 한점(540)을 촬영한 연속 단위 영상(510)의 일부를 이전 프레임의 이미지(520)와 다음 프레임의 이미지(530)로 보고 카메라의 회전, 이동에 관한 파라메타를 조합한 행렬인 에센셜 행렬을 계산한다.In addition, as shown in FIG. 5, camera motion may be extracted from the continuous unit image 510 using epipolar geometry. For reference, Epipolar Geometry refers to a geometry starting from the assumption that when a single point of a three-dimensional object is projected to the left camera using a binocular camera, the point is necessarily projected to the right camera. That is, according to the present invention, a part of the continuous unit image 510 photographing a three-dimensional point 540 is regarded as the image 520 of the previous frame and the image 530 of the next frame, and the parameters related to the rotation and movement of the camera are determined. Compute the essential matrix, which is the combined matrix.
이상의 설명은 하나의 실시예를 설명한 것에 불과하고, 본 발명은 상술한 실시예에 한정되지 않으며 첨부한 특허청구범위 내에서 다양하게 변경 가능한 것이다. 예를 들어 본 발명의 실시예에 구체적으로 나타난 각 구성 요소의 형상 및 구조는 변형하여 실시할 수 있는 것이다.The above description is only for explaining one embodiment, and the present invention is not limited to the above-described embodiment and can be variously changed within the scope of the appended claims. For example, the shape and structure of each component specifically shown in the embodiment of the present invention can be modified.
이상에서 설명한 바와 같이 본 발명에 따른 동영상의 3차원 영상합성장치 및 그 방법은 스포츠영상에 제한적으로 적용되던 동영상 처리기술을 TV 드라마나 영화 등과 같은 일반적인 동영상에도 적용할 수 있도록 한다. 즉, 동영상 처리기술의 활용범위를 확대할 수 있다는 장점이 있다.As described above, the 3D image synthesizing apparatus and method for moving images according to the present invention can be applied to general moving images such as TV dramas or movies. That is, there is an advantage in that the application range of the video processing technology can be expanded.
또한, 하드웨어적인 도움 없이도 그 동영상의 카메라 모션을 고려하여 자연스럽게 3차원 그래픽 영상과 동영상을 합성할 수 있도록 한다. 따라서, 동영상 처리를 위한 고비용의 장치를 사용하지 않고도, 동영상의 편집 및 합성을 정확하게 수행할 수 있으며, 이로 인해 디지털 영상의 시청자들이 보다 자연스럽고, 현실감있는 합성영상을 감상할 수 있도록 한다.In addition, it allows the user to synthesize 3D graphic images and videos in consideration of the camera motion of the video without hardware assistance. Therefore, it is possible to accurately edit and synthesize a video without using an expensive device for processing a video, thereby allowing viewers of digital images to enjoy a more natural and realistic composite video.
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