Image display control method and device, and display screen control system

1. An image display control method, comprising:

receiving an input image;

performing luminance-component mapping on target pixel data of the input image;

converting the target pixel data after the luminance-component mapping from a luminance-chrominance separation color space to a primary color space;

performing filtering on the target pixel data which are converted to the primary color space after the luminance-component mapping; and

outputting the target pixel data after the filtering to a display screen for image display;

wherein performing luminance-component mapping on target pixel data of the input image comprises:

extracting pixel luminance component values corresponding to pixel data of the input image in the luminance-chrominance separation color space;

performing probability statistics on the pixel luminance component values of the input image in N segments, wherein the N segments have (N+1) initial segment nodes, and N refers to a positive integer greater than 1;

acquiring (N+1) target segment nodes based on probability statistical values in the N segments and a brightness adjustment factor;

establishing segmented linear mapping relationships between initial luminance component values and target luminance component values, by using the (N+1) initial segment nodes and the (N+1) target segment nodes; and

taking the pixel luminance component values corresponding to the target pixel data of the input image in the luminance-chrominance separation color space as the initial luminance component values, and performing the luminance-component mapping on the target pixel data according to the segmented linear mapping relationships.

2. The image display control method according to claim 1 , before extracting pixel luminance component values corresponding to pixel data of the input image in the luminance-chrominance separation color space, the image display control method further comprising:

converting the input image from a primary color space to the luminance-chrominance separation color space.

3. The image display control method according to claim 1 , further comprising:

performing image intercepting to obtain the target pixel data corresponding to a local area of the input image.

4. The image display control method according to claim 1 , wherein the primary color space is a RGB color space, and the luminance-chrominance separation color space is a YUV color space or a YCbCr color space.

5. The image display control method according to claim 1 , wherein performing filtering on the target pixel data which are converted to the primary color space after the luminance-component mapping comprises:

performing bandpass filtering on each color component in the primary color space of the target pixel data after the luminance-component mapping.

6. A display screen control system, comprising a sending card, a receiving card and a light emitting diode (LED) display screen, and the receiving card being connected between the sending card and the LED display screen; wherein the sending card is configured for:

receiving an input image;

performing luminance-component mapping on the input image;

converting the input image after the luminance-component mapping from a luminance-chrominance separation color space to a primary color space;

performing filtering on the input image which is converted to the primary color space after the luminance-component mapping; and

outputting the input image after the filtering to the receiving card to thereby drive the display screen for image display;

wherein performing luminance-component mapping on the input image by the sending card comprises:

extracting pixel luminance component values corresponding to pixel data of the input image in the luminance-chrominance separation color space;

performing probability statistics on the pixel luminance component values of the input image in N segments, wherein the N segments have (N+1) initial segment nodes and N refers to a positive integer greater than 1;

acquiring (N+1) target segment nodes based on probability statistical values in the N segments and a brightness adjustment factor;

establishing segmented linear mapping relationships between initial luminance component values and target luminance component values, by using the (N+1) initial segment nodes and the (N+1) target segment nodes; and

taking the pixel luminance component values of the input image as the initial luminance component values, and performing the luminance-component mapping on target pixel data of the input image according to the segmented linear mapping relationships.

7. A display screen control system, comprising a sending card, a receiving card and an LED display screen, and the receiving card being connected between the sending card and the LED display screen;

wherein the sending card is configured for:

receiving an input image; and

performing segmented probability statistics on pixel luminance component values of the input image; and

wherein the receiving card is configured for:

receiving probability statistical values;

performing luminance-component mapping on pixel data of a local area of the input image, based on the probability statistical values;

converting the pixel data of the local area after the luminance-component mapping from a luminance-chrominance separation color space to a primary color space;

performing filtering on the pixel data of the local area which are converted to the primary color space after the luminance-component mapping; and

outputting the pixel data of the local area after the filtering to the display screen for image display;

wherein performing segmented probability statistics on pixel luminance component values of the input image through the sending card comprises:

extracting the pixel luminance component values corresponding to pixel data of the input image in the luminance-chrominance separation color space; and

performing the probability statistics on the pixel luminance component values of the input image in N segments, wherein the N segments have (N+1) initial segment nodes and N refers to a positive integer greater than 1.

8. The display screen control system according to claim 7 , wherein performing luminance-component mapping on pixel data of a local area of the input image based on the probability statistical values through the receiving card comprises:

acquiring (N+1) target segment nodes based on the probability statistical values in the N segments and a brightness adjustment factor;

establishing segmented linear mapping relationships between initial luminance component values and target luminance component values, by using the (N+1) initial segment nodes and the (N+1) target segment nodes;

intercepting the pixel data of the local area of the input image; and

taking the pixel luminance component values corresponding to the pixel data of the local area in the luminance-chrominance separation color space as the initial luminance component values, and performing the luminance-component mapping on the pixel data of the local area according to the segmented linear mapping relationships.