기사 1개: 라인센서 카메라란?
센서의 구조적 특성에 따라, 산업용 카메라는 영역 배열 카메라로 나눌 수 있습니다 (영역 센서 카메라) 선형 배열 카메라 (선형 센서 카메라). Area array cameras and linear array cameras have their own advantages and disadvantages. It is very important to choose the appropriate sensor structure for different purposes. Today, Xiaojin focuses on some knowledge points of linear sensor cameras:
1. What is a wire sensor camera?
Linear sensor camera, also known as linear array sensor camera, captures an image with one line and makes a single image. The feature of the area sensor camera is to capture the entire field of view at one time.
With a line sensor camera, a two-dimensional image can be obtained by continuously shooting an object while moving the object vertically relative to a row of photodiodes.
Compared with the area sensor camera, the line sensor camera does not need image synthesis when acquiring a long horizontal image, so it is good at capturing the subtle changes that occur pixel by pixel.
2. Application of line sensor camera
The application objects that the wire sensor camera is good at include objects with large size and objects requiring high precision resolution.
예를 들어, when shooting large objects, if the area sensor is used, the segmentation shooting method is used. Because the seam may have defects, the splicing process is very important and difficult. If a wire sensor is used, a single image can be taken, so there is no need to connect images.
The line sensor has a wide range of applications: from the inspection of social infrastructure such as roads and exterior walls, to the industrial inspection of non-woven fabrics, gears, semiconductor parts, 등., to the analysis of works of art and the sorting of fruits, effectively replacing visual inspection.
3. Principle of wire sensor camera
Like ordinary cameras, line sensor cameras convert the light of the lens into images on imaging devices (such as CCD or CMOS), convert them into electronic signals, and output them as images.
The line sensor camera acquires a long horizontal image by continuously photographing the object and moving in the vertical direction relative to the image sensor composed of a row of photodiodes.
Wire sensor cameras are roughly divided into models that can acquire monochrome images and models that can acquire color (or invisible light) images. The model that can acquire color images has a multi-layer structure and has 1 to 3 rows of photodiodes. Because a photodiode can only provide one color information.
The three line color sensor captures a specific pixel through three photodiodes, which can obtain blue, green and red information. The single row color sensor uses a photodiode to capture a specific pixel, so only a single color information can be obtained. 그러므로, since the color information of a specific pixel is estimated based on the surrounding color information, the color accuracy is not as good as that of a three line color sensor.
4. Line sensor camera resolution
The selection of line sensor camera is mainly based on the comprehensive judgment of the resolution of the target system to be moved, the distance from the workpiece, the amount of light, 등. As a reference when making this decision, the characteristics and trends of line sensor cameras are as follows:
1:It is the exposure control. Generally speaking, most linear scanning cameras do not have exposure control, and the brightness of the light source must be manually changed to respond to speed fluctuations. 게다가, it also adopts the method of changing parameters with speed.
However, through the electronic shutter, I can always shoot at the same exposure time. Even if the speed changes, we can shoot at the same brightness.
2:High speed. The camera with a throughput of 640 Mbyte/s is the highest speed camera in the market.
3:High sensitivity. Traditional line cameras need a strong light source because they can only use the exposure time for line scanning. 그러므로, the sensor itself uses an efficient sensor with an aperture ratio of 100%.
게다가, the time delay integration technology is also used to improve the sensitivity dozens of times, which is very suitable for high-speed scanning where the amount of light cannot be increased.
4:Shadow correction. Line sensor cameras can compensate for small differences in sensitivity within pixels in real time. This tool can also be used for shadow correction, 그건, to correct the light intensity change in the width direction caused by uneven lighting.
설립연도 2015, 심천진시강기술유한회사, 주식회사. 단안, 쌍안 카메라 등 다양한 카메라 모듈 제품을 전문적으로 공급하고 있습니다.. 수년간의 개발 끝에, 영상 캡쳐 분야에서 풍부한 경험을 축적해 왔습니다., 비디오 지능형 분석, 차량 전자 기술. 사물인식 등 다양한 차별화된 카메라 모듈을 독자 개발해 왔습니다., 얼굴 인식, 홍채인식, 그리고 새로운 소매점에서 널리 사용됩니다, 얼굴 인식, 지능형 모니터링, 산업 응용, 그리고 다양한 이미지 구성표. JSK는 R을 통합한 첨단 기술 기업입니다.&디, 생산, 판매 및 서비스. 자사 제품은 국내외에서 판매되고 있으며, 다수의 상장기업 지정공급업체로 지정되어 있습니다.. 관련 모듈 제품은 고객의 실제 요구 사항에 따라 맞춤화 및 개발될 수 있습니다.. 카메라 모듈 제조업체 및 파트너가 당사를 방문하여 협력에 대해 논의하는 것을 환영합니다..