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PTZ Cameras

  • Dahua offers both network and HDCVI PTZ cameras. PTZ cameras use pan, tilt, and zoom functionality to provide both wide-area coverage and great detail. Specialized cameras, like positioning systems, anti-corrosion cameras, and explosion-proof cameras are also available for user special applications.

    Ultra Series cameras feature high performance sensors, powerful optical zoom, long range IR illumination, and powerful protection to satisfy applications with high performance demands.

    The Pro Series focuses on the balance between performance and cost, while Lite and Wi-Fi Series offers users alternatives with compact designs and affordable price.

    Dahua PTZ cameras are widely used in different vertical industries, like transportation, government, city surveillance, etc., and have proven their durability and effectiveness even in extreme conditions such as at Mt. Everest.

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    Related Solutions

  • Current Challenges

    With a rise in demand for long-distance surveillance solutions, Large optical zoom PTZ cameras are gaining widespread usage. However, due to problems with algorithms currently employed in most cameras, users often experience the following issues while zooming:
    • Extreme blurriness
    • Shaking
    • Slow focus
    These problems heavily degrade the user experience. In surveillance monitoring applications, a blurry image which lasts for even a few seconds is enough to cause the loss of important information or evidence, and this fact renders many cameras useless for critical monitoring scenarios.
    Dahua PFA technology was created to solve these problems. PFA’s optimized zooming algorithms provide users with clear and steady video throughout the process of zooming, both in daytime and most nighttime scenarios, eliminating the possibility of missing any details.
    Slow focus

    About PFA Technology

    PFA, short for Predictive Focus Algorithm, provides a method to achieve continuous, high-precision focus during the entire zooming process. When the device is zooming, the technology analyzes the AF value curve transformation law under the subject distance curve, and adjusts different subject distances within the depth of focus, unifying the statistics to engage in precise subject distance adjustment, thus achieving clarity throughout the zooming process. PFA technology has innovatively introduced new methods of judgement to ensure the accuracy and predictability of the direction of subject distance adjustment. The result is a set of advanced focusing algorithms.
    Comparison of video with and without PFA

    Benefits from PFA Technology

    • Ensures clarity throughout the process of zooming
      Uses statistical analysis to stabilize the scene, enabling the device to preserve a clear image when zooming
    • Eliminates shaking during zooming
      Real time analysis and seamless adjustment of subject distance built into the algorithm logic allows for a rapid and stable transition from different subject distances.
    • Shortens Focus Time
      Due to the continuous execution of focusing algorithms throughout the zooming process, the device has already neared optimal focus upon zoom completion. After zooming, only fine incremental adjustments are needed ensure precise focus, thus substantially shortening focus time.

    The realization of PFA technology substantially improves user experience and increases product value.

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