Analog cameras are cameras that output analog signals. The structure is simple, and the price is low. There is a great limitation on the resolution (TV line number) and the frame rate, and the noise is also relatively large.
Industrial cameras, also known as cameras, are a key component of machine vision systems. Their most essential function is to convert optical signals into small, high-resolution industrial cameras that are ordered electrical signals. Choosing the right camera is also an important part of the machine vision system design. The camera not only directly determines the image resolution, image quality, etc., but also directly relates to the operating mode of the entire system.
With the development of science and technology and the continuous introduction of new technologies, analog cameras should not be able to adapt to the development of industrial modernization. For digital cameras, the video signal arrives at the output device almost as it did when leaving the camera, providing higher resolution, faster frame rates, less noise, and more. If the digital camera used is an IEEE 1394 (FireWire) interface or a USB interface, it does not require an image capture card and is directly connected to the computer. More convenient, it can provide more performance advantages.
Industrial digital camera features:
1, the shutter time is very short, you can capture fast moving objects.
For example, sticking a business card to an electric fan blade to rotate at a maximum speed and then snapping an image with an industrial camera can still clearly identify the font on the alias. Shooting with a normal camera is impossible to achieve this effect.
2. The image sensor is scanned line by line, while the image sensor of the general camera is interlaced or even scanned three lines apart.
The production of progressive scan image sensors is difficult, the yield is low, and the shipment volume is also low. Only a few companies in the world can provide such products, such as Dalsa and Sony, and they are expensive. The price of millions of progressive scan ccd varies from RMB 4,000 to 30,000. Only a progressive scan image sensor is possible to clearly capture fast moving objects. For instance, MV-VD high-speed industrial digital camera and MV-VS series 1394 interface CCD industrial camera developed and produced by Shaanxi Weishi Digital Image Technology Co., Ltd. are very good both in terms of price and quality.
3, shooting speed is much higher than the average camera.
Industrial cameras can capture between ten and hundreds of images per second, while cameras generally can only shoot 2-3 images, which is too much.
4, the output is raw data (raw data), the spectral range is often relatively wide, more suitable for high-quality image processing algorithms. For example, Machine Vision application. The image captured by a typical camera (DSC) has a spectral range that is only suitable for human eyes and has been compressed by mjpeg, resulting in poor image quality.
With the above technical advantages, industrial digital cameras will eventually replace traditional analog cameras and will certainly become the industry trend.