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PTZ, wide-angle, and network camera technology dispute
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PTZ, wide-angle, and network camera technology dispute

  • Categories:Industry News
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  • Time of issue:2021-09-07 10:27
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PTZ, wide-angle, and network camera technology dispute

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Before talking about these two camera parameters, let's take a look at the third term-panorama. Judging from the results, the panoramic camera is currently the best camera deservedly, and its field of view is complete enough to give people a "God's perspective" of aerial bird's eye view of the earth. 

Although the panoramic camera has a good field of view, it is not popular, and is generally only used on a few large trucks or medium-sized commercial vehicles. There are two reasons:

One is the high cost. A set of panoramic cameras usually has four, distributed on the four sides of the car (or the four corners of the home). If the price of an ordinary camera is 1, its price is 4. The four-fold difference makes it difficult to become a popular type. The product;

Second, it is difficult to research and develop. Four images are used to stitch a complete image with algorithms, to ensure the correction of image distortion during wide-angle shooting, and the high standard requirements for character recognition after image output is zoomed. Even for camera companies, there are technical thresholds.

 

After understanding the "panoramic view", let's look at the pan-tilt and wide angle. Seeing these two display screens, you may feel that there is a sense of limitation, because the field of view they present is not wide enough. But they are currently the most mainstream camera product branch.

 

Yuntai

PTZ camera means that the camera has an electric PTZ base, which can be remotely controlled to rotate the camera on the mobile phone App or other management interface. This type can generally be rotated from 270 degrees to 350 degrees, but it cannot be omnidirectional. Therefore, if you want to see more images, you have to operate the PTZ to turn around.

Many companies with security backgrounds in traditional industries will choose this product form, such as Jue'an, WeCool, LifeSmart, etc., which were previously interviewed by Zhai Kejun. The product person in charge of Jue'an said, “The pan-tilt was chosen because it can monitor 360-degree images (by turning). For security, no blind spots are the first priority.” Based on this, turning operation brings The poor experience is within a tolerable range.

He is also optimistic about the panoramic camera, but the cost is too high. "The price of Juean is 500-1000, which can become a good popular home security product, but if the price of the panoramic view exceeds 2000, the user's desire to buy will be greatly reduced."

 

Wide angle

Wide-angle camera refers to a camera with a viewing angle of more than 90 degrees. Generally, the field of view of the camera is 50 degrees, and most security products will choose between 50 degrees and 90 degrees, and the wide-angle camera is 90-180 degrees, of which 180 degrees are singled out and called "fisheye" cameras.

Generally speaking, the wide-angle is used more on the new and Internet-oriented smart hardware. This concept is rather vague, so let's give an example directly. Dropcam is currently the most representative consumer-level webcam. It focuses on home monitoring, video sharing, and call intercom. In the domestic Copycat version, there are Baidu i ears and eyes, Lenovo Kanjiabao, Fluorite F1 and so on.

The same is home monitoring. Unlike Jue’an, which focuses on home security, Dropcam products tend to check the status of family members, such as taking care of children and pets. In this scenario, there is not much demand for panoramic views. But if the range is slightly expanded, such as children crawling out of the crib or pets scurrying, it will be beyond reach.

 

Concluding remarks

As far as home monitoring and security are concerned, the panoramic view is the best form, and the pan-tilt and wide-angle field of view are not complete. However, as an optical component, the cost of the lens does not follow Moore's Law, and it has been stable at a level for a long time. Therefore, in the short term, it is difficult for Panorama to make products with competitive prices.

Products that use pan/tilt or wide-angle have their own application scenarios. But at present, there is no truly mature product in China, and problems abound, such as the slow rotation of the pan/tilt, the incomplete wide-angle picture, the general low performance, and the acceptable user experience is still too far away. . Dropcam has a 130-degree viewing angle, 1080p resolution, and night vision capabilities. There is no domestic product that can do it yet.

Finally, China's network environment is also a big obstacle. There is a discussion in the industry that "4G = the first year of video sharing", will this be the gospel of the landing of webcams?

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Global security feast-CPSE is coming

Global security feast-CPSE is coming

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