Patent ID: 8970731
Filing Date: 2015-03-03
Classification: H04N

Abstract:
1. A method of controlling adaptive exposure, the method comprising: calculating a pixel saturation level of pixels among an entirety of pixels provided within an image frame and resetting a target brightness value according to the pixel saturation level; and controlling an exposure level of the pixels such that pixel brightness values of the pixels are within the target brightness value and a predetermined range, wherein the resetting of the target brightness value includes: initializing the pixel saturation level to determine whether the image frame is in an oversaturation state; determining a saturated pixel, by setting a pixel having a pixel brightness value greater than a saturation pixel threshold value among the pixels comprising the image frame, to be the saturated pixel; calculating the pixel saturation level by integrating a weighting value corresponding to the saturated pixel to the pixel saturation level; and controlling the target brightness value by reducing the target brightness value by a predetermined amount when a pixel saturation value is greater than that of an over-saturation rate to arrive at a reduced target brightness value, and then, setting the reduced target brightness value to be the target brightness value.