Camera controller, image processing module, and semiconductor system
A camera module detects a camera shake in an optical axis in an optical system based on a detection result by a vibration detecting sensor. To correct a part amount of a camera shake, the module controls an actuator in a manner that a correction lens shifts in a plane vertical to the optical axis based on an amount of optical image stabilization. To correct a left amount of the camera shake, the module transmits data representing the correction left amount of the camera shake to an image processing module. The image processing module receives the data representing the correction left amount of the camera shake, and changes an effective region of picked-up image data included in frame data, based on an amount of electronic image stabilization in accordance with the correction left amount.
1. An image processing module including an electronic image stabilization function, comprising:
a first processor which receives data representing a correction left amount in an optical axis in an optical system, as transmitted from a camera controller, and outputs a signal representing an amount of electronic image stabilization in accordance with the correction left amount;
a second processor which receives frame data transmitted from an image sensor; and
a third processor which changes an effective region of a picked-up image included in the frame data, based on the amount of electronic image stabilization transmitted from the first processor,
wherein, every time a vertical synchronization signal is received from the image sensor, the first processor obtains the amount of electronic image stabilization, based on a plurality of elements of data representing a plurality of correction left amounts of camera shakes, as received after a time at which one previous vertical synchronization signal has been received, and
wherein the amount of electronic image stabilization is an average value, the smallest value, or the greatest value of the plurality of elements of data representing a plurality of correction left amounts of camera shakes.
2. The image processing module according to claim 1 ,
wherein the first processor outputs a signal which includes an amount of electronic image stabilization with a frame number attached thereto, and
wherein the third processor changes the effective region of the picked-up image, based on the amount of electronic image stabilization with a same frame number as a frame number of the frame data.
3. The image processing module according to claim 1 ,
wherein the first processor receives distortion correction data for the picked-up image in accordance with an amount of a camera shake, together with data representing the correction left amount of the camera shake, and
wherein the module includes a fourth processor for correcting distortion of the picked-up image using the distortion correction data.
4. The image processing module according to claim 1 ,
wherein the first processor receives data representing an amount of a camera shake and a position of a correction lens included in the optical system after shift, as data representing the correction left amount of the camera shake, and calculates the amount of electronic image stabilization by subtracting an amount representing the position from the amount of the camera shake.
5. The image processing module according to claim 1 ,
wherein the first processor receives data representing an amount of a camera shake and a position of a correction lens included in the optical system after shift, as data representing the correction left amount of the camera shake, and calculates the amount of electronic image stabilization by subtracting the amount representing the position from the amount of the camera shake, when the amount of the camera shake is equal to or greater than a predetermined value.