4 results about "Exposure Start Time" patented technology

The invention discloses a camera time sequence control method, electronic equipment and a driver monitoring system, and relates to the technical field of artificial intelligence. The method is suitable for a camera of an image sensor, and the exposure starting time of photosensitive pixels in all rows or columns of the camera is sequentially staggered, and according to the single exposure duration, the effective imaging time and the periodic time sequence interval of the image sensor, the exposure starting time of the photosensitive pixels in all rows or columns is calculated. Under the condition that the total energy of infrared radiation received by each exposure pixel is the same, determining the light-emitting duration of the light-supplementing light source; according to the effective imaging time, the frame blanking time and the light-emitting duration, determining a light-emitting starting moment under the condition that the starting position of a light-emitting signal of the current frame image is located at the last time slice before the end of the previous frame image; and generating a control signal corresponding to the light supplementing light source according to the light emitting starting time and the light emitting duration. According to the invention, the problems of high cost and large image noise in related technologies can be solved, the cost can be effectively reduced, and the image effect can be optimized.

The invention relates to an effective exposure time testing system and method, in particular to an effective exposure time testing system and method for an image sensor chip. The objective of the invention is to overcome the defect of lack of a method for measuring actual effective exposure time in the prior art. The system for testing the effective exposure time of the image sensor chip comprises a pulse laser used for generating pulse light and a light synchronizing signal, a photodiode used for converting a light signal into an electric signal, and a pulse signal source used for outputting the light synchronizing signal into two paths of trigger signals, and the oscilloscope is used for acquiring the initial delay between the trigger signal and the pulsed light. Meanwhile, the invention also provides a test method based on the system, and the method finds the moments when the pulse light generation moment is respectively aligned with the effective exposure starting moment and the effective exposure closing moment, thereby obtaining the effective exposure time of the to-be-tested image sensor.

In stereo cameras using SPAD sensor cameras, when ambient light is low, obstacle detection may not be possible in the early stages due to the exposure time, which could lead to a slower detection cycle. [Solution] When it is determined that there is a distance measurement image in which no object can be detected, and that the current situation in which the vehicle is driving is one in which sudden movements or cutting in are likely to occur, the exposure start timing of one of the cameras constituting the stereo camera is shifted.

The application discloses a method and device for determining exposure starting time of a spaceborne hyperspectral imager, and the method comprises the following steps: calculating the Beijing time on the satellite based on broadcast auxiliary data and a PPS second pulse signal; at the exposure starting time of the current frame image, locking the second part of the Beijing time on the satellite calculated on the hyperspectral imager and the microsecond part of the Beijing time on the satellite; after the exposure of the current frame image is completed, writing the locked second part of the Beijing time on the satellite and the microsecond part of the Beijing time on the satellite as the exposure starting time into camera auxiliary data, and downloading the camera auxiliary data and the current frame image to the ground; in the case that the broadcast auxiliary data or the PPS second pulse signal is lost, performing error correction processing on the second part of the Beijing time on the satellite and the microsecond part of the Beijing time on the satellite to obtain the Beijing time on the satellite after correction. According to the scheme, the accurate Beijing time can be directly calculated on the satellite based on the broadcast auxiliary data and the PPS second pulse signal.