In common scenarios where visitors come and go, the smart focus function of the optical lens video doorbell needs to have the ability to respond quickly and focus accurately. When the visitor presses the doorbell and the doorbell starts shooting, the smart focus system needs to quickly identify the visitor's subject and complete the focus operation in a short time through focusing technologies such as phase detection or contrast detection. In this scenario, fast focus can ensure that the visitor's facial expressions and movement details are clearly captured, making it easier for the homeowner to accurately identify the visitor's identity. At the same time, accurate focus can avoid blurring of the picture. Even if the visitor is in dynamic movement, such as waving to say hello or handing over items, the picture can be clear and stable, providing reliable visual information for the homeowner.
Express delivery and takeaway delivery are high-frequency scenarios for optical lens video doorbell. In this scenario, the smart focus function focuses on capturing the details of the item. When the courier or takeaway puts the package or food in front of the door, the doorbell needs to quickly switch the focus to the item. The smart focus system can use image recognition algorithms to prioritize the outline, shape and other features of the item, and then adjust the focal length to clearly present the item's label, packaging details and other information. This not only helps the homeowner confirm whether the received items are correct, but also clear images of items can serve as strong evidence to protect the rights of the homeowner when there is a dispute over damaged items.
The dim environment at night is a great test for the intelligent focus function of the optical lens video doorbell. When the light is insufficient, the traditional focus method is prone to slow focus or even failure to focus. At this time, the intelligent focus function combines infrared fill light or low-light imaging technology to improve the brightness of the picture while achieving precise focus. For example, through infrared focus assistance, the doorbell can use infrared to detect the distance of the object and complete the focus operation; some advanced products can also automatically adjust the focus strategy according to the ambient light. In extremely dark environments, the brightness of the picture is prioritized, and then precise focus is performed to ensure that the shape of visitors or objects can still be clearly presented at night, ensuring the safety monitoring effect at night.
In order to achieve a wider range of monitoring, the optical lens video doorbell often adopts a wide-angle lens design. In this scenario, the intelligent focus function needs to ensure a clear panoramic picture. The wide-angle lens covers a wide range, and the objects in the scene are at different distances from the doorbell. The intelligent focus system uses multi-zone focus technology to focus on different areas of the picture separately, so that the ground and door frame in the near distance and the road and pedestrians in the distance can all remain clear. At the same time, the scene recognition algorithm is used to determine the main objects and scene types in the picture, dynamically adjust the focus priority, avoid focus deviation caused by background interference, and ensure that every detail under wide-angle monitoring can be clearly discerned.
In severe weather conditions such as rain, snow, and fog, the lens of the optical lens video doorbell is easily covered by water vapor, snowflakes or dust, affecting the focus effect. The intelligent focus function ensures focus stability through dustproof and waterproof design and special image processing algorithms. On the one hand, the sealed lens structure prevents water vapor and dust from entering and affecting lens performance; on the other hand, the intelligent focus system can identify severe weather conditions according to the blur and abnormal characteristics of the picture, automatically adjust the focus parameters, and enhance the clarity of the picture. For example, in foggy weather, while reducing the noise of the picture, through multiple focus attempts, the outline of the object can be accurately captured, stable focus can be achieved, and the monitoring quality in severe weather can be guaranteed.
When children and pets are active in front of the door, their movements are flexible and changeable, which puts forward dynamic tracking requirements for the intelligent focus function of the optical lens video doorbell. The intelligent focus system uses motion detection and target tracking algorithms to monitor moving objects in the picture in real time. When children or pets enter the monitoring range, they automatically lock the target and perform dynamic focus tracking. Even if the target moves quickly and changes direction, the focus system can quickly adjust the focal length to always keep the target clear. This function not only allows homeowners to know the activities of children and pets outside the door at any time, but also detects potential dangers in time, adding protection for family safety.
In backlit scenes, strong light contrast will cause underexposure of the main body of the picture and difficulty in focusing. The intelligent focus function of the optical lens video doorbell combines HDR (high dynamic range) imaging technology to improve the focus and imaging effect in backlit environments. During the focusing process, the intelligent system first analyzes the light intensity in different areas of the picture, prioritizes the focus accuracy of the main area, and avoids focus failure due to background strong light interference. At the same time, HDR technology balances the brightness of the picture through multi-frame image synthesis, so that the faces of visitors and details of objects in backlight can be clearly presented, effectively solving the monitoring problem in backlight scenes.
