Method and system to calibrate a camera clock using flicker
A method operable by circuitry including an image processor, an image sensor, and another clock-dependent device, including measuring a flicker using the image sensor, adjusting a clock rate of the circuitry according to the measured flicker, and operating the clock-dependent device using the adjusted clock rate.
1. A method operable by a circuitry, said circuitry comprising an image processor, an image sensor comprising a plurality of pixel arrays, and another clock-dependent device, comprising:
capturing at least one image by the image sensor;
the image processor receiving the at least one image and measuring a flicker parameter using the at least one image captured by the image sensor;
adjusting a clock rate of the circuitry, thereby adjusting the operation of the image processor, image sensor and the another clock-dependent device according to the measured flicker parameter; and
operating the clock-dependent device using the adjusted clock rate.
2. The method of claim 1 , where the clock-dependent device is an interface communicating with an external device.
3. The method of claim 1 , wherein setting the clock rate of the circuitry is performed by updating a data field in a memory of the circuitry.
4. The method of claim 1 , wherein setting the clock rate of the circuitry is performed periodically.
5. A circuitry comprising an image sensor comprising a plurality of pixel arrays, an image processor coupled with a memory unit and another clock-dependent device, wherein the circuitry is configured with computerized instructions, comprising:
measuring a flicker parameter using at least one image captured by the image sensor;
adjusting a clock rate of the circuitry, thereby adjusting the operation of the image processor, image sensor and the another clock-dependent device according to the measured flicker parameter; and
operating the clock-dependent device using the adjusted clock rate.
6. The circuitry of claim 5 , where the clock-dependent device is an interface communicating with an external device.
7. The circuitry of claim 6 , where the external device is a processor.
8. The circuitry of claim 5 , wherein setting the clock rate of the circuitry is performed by updating a data field in a memory of the circuitry.
9. The circuitry of claim 5 , wherein setting the clock rate of the circuitry is performed periodically.
10. The circuitry of claim 6 , where the external device comprises a second camera, wherein the clock rate used by the second camera is adjusted based on the flicker parameter.
11. The circuitry of claim 5 , further comprising an output interface for sending and receiving images, image parts, or analysis results from the image processor to the clock-dependent device.
12. The method of claim 4 , wherein setting the clock rate of the circuitry is performed every predetermined period of time, or after capturing a predetermined number of images by the image sensor.
13. The circuitry of claim 9 , wherein setting the clock rate of the circuitry is performed every predetermined period of time, or after capturing a predetermined number of images by the image sensor.