Patent ID: 8730340

Claim:
A wide dynamic range (WDR) image processing apparatus, comprising: a sensor interface for coupling an image sensor; a backend interface for coupling an image backend apparatus; a WDR image processing engine for electrically connecting the sensor interface and the backend interface, and outputting an n-bit WDR image signal to the backend interface according to an m-bit sensing image signal, wherein the sensing image signal comprises a first bit to an m-th bit in continuity, the WDR image processing engine determines whether the value of the m-th bit is equal to 1, if the value of the m-th bit is equal to 1, then the values corresponding to the m-th bit to an (m−r)-th bit are added by a first offset to output a WDR image signal, and if the value of the m-th bit is not equal to 1, then whether the value of an (m−1)-th bit is equal to 1 is determined, if the value of the (m−1)-th bit is equal to 1, then the values corresponding to the (m−1)-th bit to an (m−s)-th bit are added by a second offset to output the WDR image signal; and a control circuit for controlling the sensor interface, the backend interface and the WDR image processing engine; wherein, m, n, r and s are positive integers, and m is greater than n.