System and method for achieving flicker removal without using flicker-independent frame

1 . A de-flicker system comprising:

a compensation gain estimation circuit, configured to receive a plurality of flicker-dependent frames from a camera module with sliding bandings, and

estimate a compensation gain for each of the plurality of flicker-dependent frames according to the plurality of flicker-dependent frames; and

a flicker removal circuit, configured to apply flicker compensation to said each of the plurality of flicker-dependent frames according to the compensation gain,

wherein the compensation gain estimation circuit derives a plurality of down-scaled frames from the plurality of flicker-dependent frames, respectively, and

estimates the compensation gain for said each of the plurality of flicker-dependent frames according to the plurality of down-scaled frames.

2 . The de-flicker system of claim 1 , wherein the compensation gain estimation circuit utilizes a mathematical model to model the compensation gain, and estimates parameters of the mathematical model according to the plurality of flicker-dependent frames.

3 . The de-flicker system of claim 1 , wherein the compensation gain estimation circuit utilizes a neural network to estimate the compensation gain.

4 . The de-flicker system of claim 1 , wherein the flicker removal circuit applies the flicker compensation to each row included in said each of the plurality of flicker-dependent frames.

5 . The de-flicker system of claim 1 , wherein the flicker removal circuit applies the flicker compensation to only a portion of rows included in said each of the plurality of flicker-dependent frames.

6 . The de-flicker system of claim 1 , wherein the flicker removal circuit utilizes a neural network to control the flicker compensation applied to said each of the plurality of flicker-dependent frames.

7 . The de-flicker system of claim 1 , wherein the compensation gain estimation circuit receives the plurality of flicker-dependent frames from the camera module operating under a regular single-exposure mode.

8 . The de-flicker system of claim 1 , wherein the compensation gain estimation circuit receives the plurality of flicker-dependent frames from the camera module operating under a dual-gain high dynamic range (DG-HDR) mode.

9 . The de-flicker system of claim 1 , wherein the compensation gain estimation circuit receives the plurality of flicker-dependent frames from the camera module operating under a high dynamic range (HDR) mode with no flicker-independent frame.

10 . A de-flicker method comprising:

receiving a plurality of flicker-dependent frames from a camera module with sliding bandings;

estimating a compensation gain for each of the plurality of flicker-dependent frames according to the plurality of flicker-dependent frames; and

applying flicker compensation to said each of the plurality of flicker-dependent frames according to the compensation gain,

wherein estimating the compensation gain for said each of the plurality of flicker-dependent frames according to the plurality of flicker-dependent frames comprises:

deriving a plurality of down-scaled frames from the plurality of flicker-dependent frames, respectively; and

estimating the compensation gain for said each of the plurality of flicker-dependent frames according to the plurality of down-scaled frames.

11 . The de-flicker method of claim 10 , wherein estimating the compensation gain for said each of the plurality of flicker-dependent frames according to the plurality of flicker-dependent frames comprises:

utilizing a mathematical model to model the compensation gain; and

estimating parameters of the mathematical model according to the plurality of flicker-dependent frames.

12 . The de-flicker method of claim 10 , wherein estimating the compensation gain for said each of the plurality of flicker-dependent frames according to the plurality of flicker-dependent frames comprises:

utilizing a neural network to estimate the compensation gain.

13 . The de-flicker method of claim 10 , wherein applying the flicker compensation to said each of the plurality of flicker-dependent frames according to the compensation gain comprises:

applying the flicker compensation to each row included in said each of the plurality of flicker-dependent frames.

14 . The de-flicker method of claim 10 , wherein applying the flicker compensation to said each of the plurality of flicker-dependent frames according to the compensation gain

applying the flicker compensation to only a portion of rows included in said each of the plurality of flicker-dependent frames.

15 . The de-flicker method of claim 10 , wherein applying the flicker compensation to said each of the plurality of flicker-dependent frames according to the compensation gain comprises:

utilizing a neural network to control the flicker compensation applied to said each of the plurality of flicker-dependent frames.

16 . The de-flicker method of claim 10 , wherein receiving the plurality of flicker-dependent frames with sliding bandings comprises: receiving the plurality of flicker-dependent frames that are output from the camera module operating under a regular single-exposure mode.

17 . The de-flicker method of claim 10 , wherein receiving the plurality of flicker-dependent frames with sliding bandings comprises:

receiving the plurality of flicker-dependent frames that are output from the camera module operating under a dual-gain high dynamic range (DG-HDR) mode.

18 . The de-flicker method of claim 10 , wherein receiving the plurality of flicker-dependent frames with sliding bandings comprises:

receiving the plurality of flicker-dependent frames that are output from the camera module operating under a high dynamic range (HDR) mode with no flicker-independent frame.