KR100261563B1 - Method for motion detecting of ccd camera - Google Patents
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- KR100261563B1 KR100261563B1 KR1019970070744A KR19970070744A KR100261563B1 KR 100261563 B1 KR100261563 B1 KR 100261563B1 KR 1019970070744 A KR1019970070744 A KR 1019970070744A KR 19970070744 A KR19970070744 A KR 19970070744A KR 100261563 B1 KR100261563 B1 KR 100261563B1
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Abstract
본 발명은 씨씨디 카메라의 움직임검출 방법에 관한 것으로, 종래의 장치에 있어서는 씨씨디 카메라에서 컴퓨터에 전송된 영상 데이터에서 움직임 검출 처리를 통해 움직임의 유무를 검출하기 위해서는 처리속도가 빠른 컴퓨터가 필요해 비용이 많이 소요될 뿐 아니라, 한 화면에 대한 영상을 모두 전송해야 되므로 전송할 데이터량이 많아 영상처리에 시간이 지연되는 문제점이 있었다. 따라서, 본 발명은 씨씨디 카메라에 내장된 디지탈신호 처리기의 알고리즘을 움직임을 검출할 수 있도록 변경함으로써, 컴퓨터의 역할을 씨씨디 카메라가 대신하도록 하여 저비용 고속으로 움직임을 검출할 수 있도록 하는 효과가 있다.The present invention relates to a motion detection method of a CD camera, and in the conventional apparatus, a computer having a high processing speed is required to detect the presence or absence of motion through motion detection processing from image data transmitted from a CD camera to a computer. Not only does this require a lot of data, but because all the images for one screen need to be transmitted, there is a problem in that a large amount of data to be transmitted causes a delay in image processing. Accordingly, the present invention has the effect of changing the algorithm of the digital signal processor built in the CD camera to detect the motion, so that the CD camera takes the place of the computer to detect the motion at low cost and high speed. .
Description
본 발명은 씨씨디 카메라의 움직임검출 방법에 관한 것으로, 특히 씨씨디 카메라에 내장된 디지탈신호 처리기(Digital Signal Processing : DSP)의 알고리즘을 수정하여 움직임을 검출할 수 있도록 함으로써, 컴퓨터의 움직임 검출 역할을 씨씨디 카메라 자체에서 대신하도록 하여 저비용 고속으로 움직임을 검출할 수 있도록 하는 씨씨디 카메라의 움직임검출 방법에 관한 것이다.The present invention relates to a motion detection method of a CD camera, and in particular, by modifying the algorithm of a digital signal processor (Digital Signal Processing (DSP)) built in the CD camera to detect motion, thereby acting as a computer motion detection role The present invention relates to a motion detection method of a CD camera which can detect motion at low cost and high speed by replacing the CD camera itself.
종래 일반적인 영상처리 장치에 있어서, 씨씨디 카메라에서 출력되는 영상데이터로 부터 움직임을 검출하는 방법은 시분할 방식으로 찍힌 한 화면의 영상정보를 통신라인에 의해 컴퓨터에 전송받아 주메모리에 저장하고, 다음 화면을 전송받아 상기 두 영상의 화소를 비교하여 그 차이를 구한 다음 그 차이값의 크기에 의해 움직임의 변화를 감지한다. 이러한 움직임 검출을 응용하는 것에는 무인 감시 카메라 또는 물체의 움직임을 포착하여 자동으로 추적하게 하는 물체 추적 카메라 등이 있다.In a conventional general image processing apparatus, a method of detecting a motion from image data output from a CD camera is to receive image information of one screen taken by a time division method from a computer by a communication line and store it in a main memory, and then store the next screen. Receives the difference between the pixels of the two images to obtain the difference, and detects the change in the movement by the magnitude of the difference value. Applications of such motion detection include unmanned surveillance cameras or object tracking cameras that capture and automatically track the movement of an object.
도1은 종래 컴퓨터를 이용한 움직임검출 방법을 보인 순서도로서, 이에 도시된 바와 같이 카메라로 부터 영상 1화면을 컴퓨터에 전송하여 주 메모리에 저장하는 제1단계와; 새로운 영상 1화면을 상기 제1단계에서 기 저장된 영상과 배타적 논리합에 의해 그 편차를 구하는 제2단계와; 상기 제2단계에서 구한 편차의 절대값을 오차의 허용범위와 비교하는 제3단계와; 상기 제3단계의 비교에 의해 편차의 절대값이 오차의 허용범위 이내이면 움직임이 없다고 판단하고, 편차의 절대값이 오차의 허용범위를 벗어나면 움직임이 있다고 판단하여 그에 따른 움직임을 수행하는 제4단계로 구성된 것으로, 이하 종래 움직임검출 과정을 상세히 설명하면 다음과 같다.1 is a flow chart illustrating a motion detection method using a conventional computer, as shown in FIG. A second step of obtaining a deviation of the new image 1 screen by an exclusive logical sum from the image previously stored in the first step; A third step of comparing the absolute value of the deviation obtained in the second step with an allowable range of the error; A fourth step of determining that there is no movement if the absolute value of the deviation is within the tolerance range by the comparison of the third step, and determining that there is motion if the absolute value of the deviation is outside the tolerance range of the error and performing the corresponding motion In the following description, the motion detection process will be described in detail.
씨씨디 카메라로부터 아날로그 또는 디지탈 영상 1화면을 통신라인을 통해 영상 처리 장치가 부착된 컴퓨터에 전송하면, 컴퓨터에서는 아날로그 데이터는 디지탈로 변환해서 주메모리에 저장 하고, 카메라로부터 새로운 영상 1화면을 전송받아 기 저장되어 있는 영상화면과 배타적 논리합을 취해 차이가 있는 화소만을 모아서 그 편차를 구한다음, 편차의 절대값을 오차의 허용범위와 비교하여 허용범위 이내이면 움직임이 없는것으로 판단하고, 허용범위를 벗어나면 움직임이 있는것으로 판단하여 그 판단결과에 따른 동작을 수행하게 된다.When an analog or digital video screen is transferred from a CD camera to a computer equipped with an image processing device through a communication line, the computer converts the analog data into digital and stores it in main memory, and receives a new video screen from the camera. The result is obtained by taking an exclusive logical sum from a previously stored video screen, collecting only the pixels with the difference, and calculating the deviation. The absolute value of the deviation is compared with the allowable range of the error to determine that there is no movement. It is determined that there is a surface movement and performs the operation according to the determination result.
그러나, 상기 종래의 장치에 있어서는 씨씨디 카메라에서 컴퓨터에 전송된 영상 데이터에서 움직임 검출 처리를 통해 움직임의 유무를 검출하기 위해서는 처리속도가 빠른 컴퓨터가 필요해 비용이 많이 소요될 뿐 아니라, 한 화면에 대한 영상을 모두 전송해야 되므로 전송할 데이터량이 많아 영상처리에 시간이 지연되는 문제점이 있었다.However, in the conventional apparatus, in order to detect the presence or absence of motion through motion detection processing from image data transmitted from a CD camera to a computer, a computer having a high processing speed is not only expensive, but also an image for one screen. Since all of them must be transmitted, the amount of data to be transmitted has a problem of delaying time in image processing.
따라서, 본 발명은 상기와 같은 종래의 문제점을 해결하기 위하여 창출한 것으로, 씨씨디 카메라에 내장된 디지탈신호 처리기의 알고리즘을 움직임을 검출할 수 있도록 변경함으로써, 컴퓨터의 역할을 씨씨디 카메라가 대신하도록 하여 저비용 고속으로 움직임을 검출할 수 있도록 하는 씨씨디 카메라의 움직임검출 방법을 제공 하는데 그 목적이 있다.Therefore, the present invention was created to solve the above-mentioned conventional problems, by changing the algorithm of the digital signal processor built in the CD camera to detect the motion, so that the CD camera to replace the role of the computer The purpose of the present invention is to provide a motion detection method of a CD camera that can detect motion at low cost and high speed.
도1은 종래 씨씨디 카메라를 통한 움직임 검출 과정을 보인 순서도.1 is a flow chart illustrating a motion detection process using a conventional CD camera.
도2는 본 발명에 의한 씨씨디 카메라의 움직임 검출 과정을 보인 순서도.Figure 2 is a flow chart showing a motion detection process of the CD camera according to the present invention.
이와 같은 목적을 달성하기 위한 본 발명의 구성은, 씨씨디 카메라의 마이크로컴퓨터에서 디지탈신호 처리기로부터 자동 초점(Auto Focus : AF)과 자동 노출(Auto Exposure : AE) 정보를 읽어오는 제1단계와; 상기 제1단계의 자동 노출 정보에서 휘도의 값이 상한과 하한을 벗어나는지를 비교하는 제2단계와; 상기 제2단계에서 구한 노출 정보의 휘도값이 상한과 하한을 벗어나는 경우는 움직임 검출과정을 중단하고, 상한과 하한을 벗어나지 않는 적정치인 경우는 자동초점 정보의 값을 휘도로 나누어 그 절대값을 구하여 표준화하는 제3단계와; 상기 제3단계에서 표준화한 값과 현재의 표준화한 값을 비교하는 제4단계와; 상기 제4단계에서 비교한 값에 따라 오차의 허용범위를 벗어나는 경우 움직임이 없는것으로 판단하고, 오차의 허용범위 이내인 경우 움직임이 있다고 판단하여 그에 따른 움직임을 수행하는 제5단계로 구성하여 달성되는 것으로, 본 발명에 따른 실시예를 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다.A configuration of the present invention for achieving the above object comprises: a first step of reading Auto Focus (AF) and Auto Exposure (AE) information from a digital signal processor in a microcomputer of a CD camera; A second step of comparing whether a luminance value deviates from an upper limit and a lower limit in the automatic exposure information of the first step; If the luminance value of the exposure information obtained in the second step is out of the upper limit and the lower limit, the motion detection process is interrupted, and in the case of an appropriate value not exceeding the upper limit and the lower limit, the absolute value is obtained by dividing the value of the autofocus information by the luminance. A third step of standardizing; A fourth step of comparing the value normalized in the third step with the current standardized value; According to the value compared in the fourth step is determined that there is no movement if the deviation is outside the tolerance range, and if it is within the tolerance range of the error is determined by the fifth step of performing the movement When described in detail with reference to the accompanying drawings, an embodiment according to the present invention.
도2는 본 발명 씨씨디 카메라의 움직임 검출 방법을 보인 순서도로서, 이에 도시한 바와 같이 씨씨디 카메라의 마이크로컴퓨터에서 디지탈신호 처리기로부터 자동 초점과 자동 노출 정보를 읽어와(ST1) 상기 자동 노출 정보에서 휘도의 상한과 하한을 비교하여(ST2) 상한과 하한을 벗어나는 경우 즉, 초점 정보가 의미가 없는 심한 저조도와 심한 고휘도에서는 움직임 검출단계를 중단하고, 상한과 하한을 벗어나지 않는 적정치인 경우는 자동초점 정보가 고역 통과 필터를 거쳐나온 값이므로 사물의 에지(edge)성분 뿐만 아니라 밝기와 비례하게 되므로 밝기와 무관한 에지성분을 구하기 위해서 자동 초점 정보의 값을 휘도값으로 나누어 그 절대값을 구해 표준화하여(ST3) 상기 단계(ST3)에서 표준화한 값과 현재의 표준화한 값을 비교하여(ST4) 그 비교한 값이 오차의 허용범위를 벗어나는 경우 움직임이 없는것으로 판단하고, 오차의 허용범위 이내인 경우 움직임이 있다고 판단하여 그에 따른 제어 동작의 수행(ST5)을 반복해서 실시한다.FIG. 2 is a flowchart illustrating a motion detection method of a CD camera according to the present invention. As shown in FIG. 2, the auto focus and auto exposure information is read from a digital signal processor using a microcomputer of the CD camera (ST1). When the upper limit and lower limit of the luminance are compared (ST2) and the upper limit and the lower limit are exceeded, that is, when the focus information is in a low intensity and the high luminance which is meaningless, the motion detection step is stopped, and the automatic focus is performed when the optimal value does not deviate from the upper limit and the lower limit. Since information is the value passed through the high pass filter, it is proportional to not only the edge component of the object but also the brightness. Therefore, in order to find the edge component irrelevant to the brightness, the absolute value is obtained by dividing the value of the autofocus information by the luminance value. (ST3) The value normalized in step ST3 is compared with the current standardized value (ST4). If it is out of the allowable range of the error, it is determined that there is no motion, and if it is within the allowable range of the error, it is determined that there is a motion and repeatedly perform the control operation (ST5) accordingly.
이상에서 설명한 바와 같이 본 발명 씨씨디 카메라의 움직임검출 방법은 씨씨디 카메라에 내장된 디지탈신호 처리기의 알고리즘을 움직임을 검출할 수 있도록 변경함으로써, 컴퓨터의 역할을 씨씨디 카메라가 대신하도록 하여 저비용 고속으로 움직임을 검출할 수 있도록 하는 효과가 있다.As described above, the motion detection method of the CD camera of the present invention changes the algorithm of the digital signal processor built in the CD camera to detect motion, so that the CD camera replaces the role of the computer so that the CD camera has a low cost and high speed. There is an effect of detecting movement.
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