An analog camera is a camera whose output signal is an analog signal. Its structure is simple, the price is cheap in the resolution (TV line number) and the frame rate has the very big limit, the noise is also quite big. Industrial camera, also known as camera, is a key component in the machine vision system. Its most essential function is to transform optical signals into small hd industrial cameras into ordered electrical signals. Choosing the right camera is also an important part in the design of machine vision system. The camera not only directly determines the image resolution and image quality, but also is directly related to the operation mode of the whole system.
With the development of science and technology and the introduction of new technology, analog cameras cannot adapt to the development of industrial modernization. For digital cameras, the video signal arrives at the output device almost exactly as it leaves the camera, providing higher resolution, faster frame rates, less noise and more features. If you are using a digital camera with an IEEE1394(FireWire) interface or a USB interface, you don’t need an image capture card to connect directly to your computer. More convenience, can provide more performance advantages.
Features of industrial digital cameras:
1. Very short shutter speed allows you to capture fast moving objects.
For example, you can attach a business card to an electric fan blade, rotate it at maximum speed, and then snap an image with an industrial camera that can still clearly identify the type on the card. You can’t do that with a normal camera.
2, the image sensor is progressive scanning, and the general camera image sensor is interspaced scanning, or even every three lines of scanning.
It is difficult to produce progressive scan image sensors, with low yield and small shipments. Only a few companies in the world can provide such products, such as Dalsa and Sony, and their prices are expensive. The price of a million-level progressive scan CCD ranges from 4,000 yuan to 30,000 yuan. Only by using progressive scanning image sensor, it is possible to capture fast moving objects clearly. For example, the AFT-VD high-speed industrial digital camera and AFT-VS series 1394 interface CCD industrial camera developed and produced by Effet Optoelectronics are very good in terms of price and quality.
3. The shooting speed is much higher than that of ordinary cameras.
Industrial cameras can take ten to several hundred pictures per second, while ordinary cameras can only take two or three images, which is too much difference.
4. The output is raw data with a wide spectral range, which is suitable for high-quality image processing algorithms. For example, Machine Vision applications. But the general camera (DSC) takes the picture, its spectrum range is only suitable for the human eye vision, and after the MJPEG compression, the image quality is poor. With the above technical advantages, the industrial digital camera will eventually replace the traditional analog camera, will become the industry development trend.
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