Image processing method and device, and display device

1. An image processing method, comprising:

acquiring an image brightness information of an image to be displayed, the image brightness information comprising a brightness information of M of first sub-image areas arranged in a first direction, the brightness information of each first sub-image area among the M of first sub-image areas comprises a brightness information of at least two band points, M is an integer greater than 1;

obtaining a gray scale compensation parameter of the at least two band points for each first sub-image area, according to the brightness information of the at least two band points for each first sub-image area and a reference brightness L 0 ;

obtaining a gray scale compensation information of each first sub-image area, according to the gray scale compensation parameter of the at least two band points for each first sub-image area; and

performing a gray scale compensation process on an image information of the image, according to the gray scale compensation information of the M of first sub-image areas,

wherein the obtaining the gray scale compensation parameter of the at least two band points for each first sub-image area according to the brightness information of the at least two band points for each first sub-image area and the reference brightness L 0 comprises:

obtaining a reference gray scale G 0 associated with the reference brightness L 0 based on a preset brightness-gray scale relationship;

obtaining an average brightness L 1 of the at least two band points for each first sub-image area, according to the brightness of each band point from the brightness information of each first sub-image area; and

obtaining the gray scale compensation parameter ΔG 1 of each band point for each first sub-image area according to the reference gray scale G 0 , the reference brightness L 0 and the average brightness of the band points L 1 , wherein

Δ

⁢

⁢

G

1

=

α

*

G

0

(

1

-

Gamma

⁢

L

0

L

_

1

*

)

,

α is greater than or equal to 0.5 but less than or equal to 1, and Gamma is a display parameter.

2. The image processing method of claim 1 , wherein the image brightness information further comprises a brightness information of N of second sub-image areas arranged in a second direction which is perpendicular to the first direction, the brightness information of each second sub-image comprises a brightness information of at least two band points, N is an integer greater than 1;

the image processing method further comprises:

obtaining a gray scale compensation parameter of the at least two band points for each second sub-image area, according to the brightness information of the at least two band points for each second sub-image area and the reference brightness L 0 ;

obtaining a gray scale compensation information of each second sub-image area, according to the gray scale compensation parameter of the at least two band points for each second sub-image area; and

performing a gray scale compensation process on an image information of the image, according to the gray scale compensation information of the N of second sub-image areas.

3. The image processing method of claim 2 , wherein the obtaining the gray scale compensation parameter of the at least two band points for each second sub-image area according to the brightness information of the at least two band points for each second sub-image area and a reference brightness L 0 comprises:

obtaining an average brightness L 2 of the band points for each second sub-image area, according to the brightness of each band point from the brightness information of each second sub-image area L 2 ;

obtaining the gray scale compensation parameter ΔG 2 of each band point for each second sub-image area according to the reference gray scale G 0 , the reference brightness L 0 and the average brightness L 2 of the band points; wherein

Δ

⁢

⁢

G

2

=

β

*

G

0

(

1

-

Gamma

⁢

L

0

L

_

2

*

)

,

β is greater than or equal to 0.5 but less than or equal to 1.

4. The image processing method of claim 3 , wherein the image processing method is applied to a display device comprising a display panel and a signal processor, wherein the display panel comprises the plurality of first sub-images areas, the reference brightness L 0 is the average brightness of the band points for a target first sub-image area, the first direction is a direction away from a signal generation chip, the target first sub-image area is the k th first sub-image area along the first direction, and k is an integer greater than or equal to 2 but less than or equal to M;

wherein performing the gray scale compensation process on the image information according to the gray scale compensation information of the M of first sub-image areas comprises:

obtaining a gray scale infiltration compensation information of the image along the first direction according to the gray scale compensation information of the M of first sub-image areas, so that the gray scale infiltration compensation information along the first direction increases or decreases in a direction close to the k th first sub-image area; and

performing an infiltration gray scale compensation on the image information according to the gray scale infiltration compensation information along the first direction;

wherein performing the gray scale compensation process on the image information according to the gray scale compensation information of the N of second sub-image areas comprises:

obtaining the gray scale infiltration compensation information of the image along the second direction according to the gray scale compensation information of the N of second sub-image areas, so that the gray scale infiltration compensation information along the second direction increases or decreases in a direction from 1 st second sub-image area to the t th second sub-image area, the k th first sub-image area has a geometric center positioned in the t th second sub-image area; and

performing the infiltration gray scale compensation on the image information according to the gray scale infiltration compensation information along the second direction.

5. The image processing method of claim 2 , wherein the image brightness information comprises a plurality of primary color image brightness information and white image brightness information;

the method also comprises:

determining whether the image is a gray scale image or a color image;

compensating the gray scale of each primary color pixel of the image along the second direction by using the gray scale compensation information of the N of second sub-image areas corresponding to the white image brightness information, in response to determining that the image is the gray scale image; and

compensating the gray scale of each primary color pixel of the image along the second direction by using the gray scale compensation information of the N of second sub-image areas corresponding to the plurality of primary color image brightness information, in response to determining that the image is the color image.

6. The image processing method of claim 1 , wherein the image brightness information comprises a plurality of primary color image brightness information and white image brightness information;

the method also comprises:

determining whether the image is a gray scale image or a color image;

compensating the gray scale of each primary color pixel of the image along the first direction by using the gray scale compensation information of the M of first sub-image areas corresponding to the white image brightness information, in response to determining that the image is the gray scale image; and

compensating the gray scale of each primary color pixel of the image along the first direction by using the gray scale compensation information of the M of first sub-image areas corresponding to the plurality of primary color image brightness information, in response to determining that the image is the color image.

7. The image processing method of claim 6 , further comprising:

compensating the gray scale of each primary color pixel of the image along the second direction by using the gray scale compensation information of the N of second sub-image areas corresponding to the white image brightness information, in response to determining that the image is the gray scale image; and

compensating the gray scale of each primary color pixel of the image along the second direction by using the gray scale compensation information of the N of second sub-image areas corresponding to the plurality of primary color image brightness information, in response to determining that the image is the color image.

8. The image processing method of claim 1 , wherein

performing the gray scale compensation process on the image information according to the gray scale compensation information of the M of first sub-image areas, or performing the gray scale compensation process on the image information according to the gray scale compensation information of the N of second sub-image areas, in response to an average gray scale of at least one primary color of the image being greater than a gray scale threshold of the at least one primary color.

9. The image processing method of claim 1 , further comprising:

performing a brightness uniformization process on the image information by using a brightness uniformization method.

10. An image processing device, comprising:

a memory having instructions stored thereon; and

a processor configured to execute the instructions so as to implement the image processing method of claim 1 .

11. A display device, comprising the image processing device of claim 10 .

12. A display device, comprising:

a display panel;

a signal generation chip; and

the image processing device of claim 10 .