Image processing system and operating method thereof

An image processing system comprising:

• a lens configured to receive light and transmit the received light to a plurality of micro-lenses included in an image sensor,
• wherein the image sensor is configured to:
• generate position correction information about a test image received through the lens according to a phase difference between pixels corresponding to a first micro-lens among the plurality of micro-lenses, and control a position of the lens for a captured image on the basis of the position correction information;
• and
• an image processor configured to perform a resolution restoration operation on the basis of pixel values for the captured image and output a high-resolution image with restored resolution, and
• wherein the image sensor includes a preliminary operation performer configured to detect an in-focus position corresponding to a position of the lens where phases of the pixels with respect to the test image have a same value, and a correction position corresponding to the position of the lens where a difference of the phases between the pixels with respect to the test image is the largest.

A method of operating an image processing system, the method comprising:

• sensing a test image while performing a lens sweep of a lens;
• generating position correction information for the test image based on a difference between first pixel values corresponding to pixels of a first micro-lens in an image sensor;
• and
• changing a position of the lens based on the position correction information,
• wherein generating the position correction information comprises detecting an in-focus position corresponding to the position of the lens where the first pixel values have a same value, the first micro-lens comprising adjacent pixels having a same color, and a correction position corresponding to the position of the lens with the largest difference between the first pixel values.

A method of operating an imaging processing system, the method comprising:

• sensing a test image while performing a lens sweep of a lens;
• detecting an in-focus position where first pixels corresponding to a first micro-lens in an image sensor have a same phase, and a correction position where a phase difference between the first pixels is the largest;
• generating position correction information for the test image including information about movement distance and direction of the lens movement from the in-focus position to the correction position;
• changing the position of the lens to a position corresponding to the position correction information;
• and
• generating pixel values of a captured image through the lens whose position has been changed.