Abstract: This application discloses a calibration method for navigation of an UAV including a vector sensor. The calibration method includes: collecting, during a flight of the UAV, a current correction value and current data during a current measurement performed by the vector sensor; acquiring previous data during a previous measurement performed by the vector sensor; acquiring an adjustment quantity according to the current data and the previous data; acquiring a next correction value according to the current correction value and the adjustment quantity; and acquiring next original data during a next measurement performed by the vector sensor, acquiring next valid data according to the next original data and the next correction value, and controlling headings and postures of the UAV according to the next valid data. With the calibration method of this application, the next valid data Vk+1 more closely approximated to a true value can be obtained.

Abstract: This application discloses a calibration method for navigation of an unmanned aerial vehicle (UAV), a non-transitory computer-readable storage medium and a UAV implementing the same. The calibration method includes: collecting, during a flight of the UAV, reference data during two measurements of a reference vector performed by a vector sensor; acquiring a zero-point offset M0 of the vector sensor according to the reference data; acquiring original data Rk of any vector measured by the vector sensor; acquiring valid data Vk according to the zero-point offset M0 and the original data Rk; and control headings and postures of the UAV according to the valid data Vk. With the calibration method in this application, the valid data Vk is defined as a vector data acquired after a zero-point error of the original data Rk is eliminated, which is more closely approximated to an actual value of a to-be-measured vector.

Abstract: This application discloses a control circuit of a PTZ camera and control method. The control circuit includes: a motor drive circuit, a monitoring circuit, a gimbal motor, and a microprocessor. The motor drive circuit, the gimbal motor, and the microprocessor are electrically connected to the monitoring circuit respectively. The gimbal motor is configured to drive a rotor of the camera to rotate. The monitoring circuit is configured to acquire a first signal between the motor drive circuit and the gimbal motor, and output a second signal to the microprocessor according to the first signal. The microprocessor is configured to obtain an in-place status of the gimbal motor according to the second signal. The motor drive circuit is configured to control an operating state of the gimbal motor according to the in-place status. As a result, the deviation caused by back-and-forth rotation of the gimbal motor can be eliminated in time.

Abstract: A range-finding method, a apparatus, a terminal system, and a computer-readable storage medium are provided.

Abstract: A monocular visual simultaneous localization and mapping (SLAM) data processing method.

Abstract: This application discloses an object detection method, a security device, and a readable storage medium.

Abstract: This application discloses a method for controlling an optical sensing circuit, an optical sensing circuit, and an imaging device. The optical sensing circuit includes an optical sensor and a voltage dividing circuit connected in series, an input voltage (a voltage of the voltage dividing circuit) and an output voltage are obtained, a resistance value of the optical sensor is calculated according to the input voltage, a light intensity value is obtained according to the resistance value of the optical sensor, and then, different loads are controlled based on a level of the output voltage for light intensity in different ranges to perform corresponding operations. This application has high flexibility and strong adaptability, and can effectively broaden an application scope of a photosensitive device.

Abstract: This application discloses a camera circuitry and a camera device. The camera circuitry includes a light collection circuit, an operational amplification circuit, an image processor and a first resistor. The light collection circuit is used to collect the brightness value and pass the collected brightness value through the operational amplification circuit and the first resistor are then transmitted to the image processor, and the image processor initiate imaging based on the brightness value. By providing an operational amplification circuit and a first resistor at the back end of the light collecting circuit, and adopting a continuous power supply mode for the light collecting circuit and the operational amplification circuit, the convergence speed of the light brightness value is effectively improved, so that accurate ambient light brightness values can be obtained faster to achieve normal camera functions.