Method and apparatus for displaying interface image

Patent metadata

Field	Value
Publication number	US-2019172417-A1
Application number	US-201816163535-A
Country	US
Kind code	A1
Filing date	Oct 17, 2018
Priority date	Dec 5, 2017
Publication date	Jun 6, 2019
Grant date	—

Abstract

A method of displaying an interface image includes: acquiring a currently displayed interface image, and determining a grayscale of each pixel point of the interface image; in the grayscales of all the pixel points, determining the number of each grayscale; acquiring N grayscales, the numbers of the N grayscales being the first N largest numbers, where N is a preset positive integer; when each difference between the N grayscales exceeds a first preset value, and a ratio of a sum of the numbers of the N grayscales to a sum of the numbers of all the grayscales exceeds a second preset value, determining a brightness adjustment parameter corresponding to the interface image; and reducing a current backlight brightness based on the brightness adjustment parameter.

First claim

1 . A method for displaying an interface image, comprising:
acquiring a currently displayed interface image, and determining a grayscale of each of a plurality of pixel points of the interface image; in the grayscales of the plurality of pixel points, determining a number of each grayscale; acquiring N grayscales, the numbers of the N grayscales being the first N largest numbers, where N is a preset positive integer; when each difference between the N grayscales exceeds a first preset value, and a ratio of a sum of the numbers of the N grayscales to a sum of the numbers of all the grayscales exceeds a second preset value, determining a brightness adjustment parameter corresponding to the interface image; and reducing a current backlight brightness based on the brightness adjustment parameter.

2 . The method according to claim 1 , wherein the determining the brightness adjustment parameter corresponding to the interface image comprises:
determining a contrast of the interface image; and determining a brightness adjustment parameter corresponding to a contrast range to which the contrast of the interface image belongs according to a pre-stored corresponding relationship between the contrast range and the brightness adjustment parameter.

3 . The method according to claim 2 , wherein the determining the brightness adjustment parameter corresponding to the contrast range to which the contrast of the interface image belongs according to the pre-stored corresponding relationship between the contrast range and the brightness adjustment parameter comprises:
acquiring a current ambient light brightness; and determining the brightness adjustment parameter corresponding to the interface image according to the current ambient light brightness, the contrast of the interface image, and a pre-stored corresponding relationship among the contrast range, the ambient light brightness range and the brightness adjustment parameter.

4 . The method according to claim 2 , wherein the determining the brightness adjustment parameter corresponding to the contrast range to which the contrast of the interface image belongs according to the pre-stored corresponding relationship between the contrast range and the brightness adjustment parameter comprises:
acquiring a current backlight brightness; determining the brightness adjustment parameter corresponding to the interface image according to the current backlight brightness, the contrast corresponding to the interface image, and a pre-stored corresponding relationship among the contrast range, the backlight brightness range, and the brightness adjustment parameter.

5 . The method according to claim 1 , wherein prior to the determining the grayscale of each pixel point of the interface image, the method further comprises:
acquiring a current ambient light brightness; and determining whether the current ambient brightness is within a preset brightness range.

6 . The method according to claim 1 , wherein prior to the determining the grayscale of each pixel point of the interface image, the method further comprises:
acquiring a current backlight brightness; and determining whether the current backlight brightness is greater than a third preset value.

7 . The method according to claim 1 , wherein:
the brightness adjustment parameter is an adjustment brightness; and the reducing the current backlight brightness according to the brightness adjustment parameter comprises: subtracting the adjustment brightness corresponding to the interface image from the current backlight brightness to obtain a reduced backlight brightness.

8 . The method according to claim 1 , wherein:
the brightness adjustment parameter is an adjustment ratio; and the reducing the current backlight brightness according to the brightness adjustment parameter comprises: multiplying the current backlight brightness by the adjustment ratio corresponding to the interface image to obtain a reduced backlight brightness; or calculating a product of the current backlight brightness and the adjustment ratio corresponding to the interface image, and subtracting the product from the current backlight brightness to obtain a reduced backlight brightness.

9 . The method according to claim 1 , wherein:
prior to the determining the grayscale of each pixel point of the interface image, the method further comprises: mapping the interface image to an HSV space or a YUV space; the determining the grayscale of each pixel point of the interface image comprises: determining the grayscale of each pixel point of the interface image based on lightness information of the HSV space or lightness information of the YUV space.

10 . A non-transitory computer-readable storage medium having at least one instruction, at least one program, code set, or instruction set stored thereon executable by a processor to perform:
acquiring a currently displayed interface image, and determining a grayscale of each pixel point of the interface image; in the grayscales of all the pixel points, determining the number of each grayscale; acquiring N grayscales, the numbers of the N grayscales being the first N largest numbers, where N is a preset positive integer; when each difference between the N grayscales exceeds a first preset value, and a ratio of a sum of the numbers of the N grayscales to a sum of the numbers of all the grayscales exceeds a second preset value, determining a brightness adjustment parameter corresponding to the interface image; and reducing a current backlight brightness based on the brightness adjustment parameter.

11 . The non-transitory computer-readable storage medium according to claim 10 , wherein the determining the brightness adjustment parameter corresponding to the interface image comprises:
determining a contrast of the interface image; and determining a brightness adjustment parameter corresponding to a contrast range to which the contrast of the interface image belongs according to a pre-stored corresponding relationship between the contrast range and the brightness adjustment parameter; and wherein the determining the brightness adjustment parameter corresponding to the contrast range to which the contrast of the interface image belongs according to the pre-stored corresponding relationship between the contrast range and the brightness adjustment parameter comprises: acquiring a current ambient light brightness; and determining the brightness adjustment parameter corresponding to the interface image according to the current ambient light brightness, the contrast of the interface image, and a pre-stored corresponding relationship among the contrast range, the ambient light brightness range and the brightness adjustment parameter.

12 . An apparatus configured to display an interface image, the apparatus comprising:
a processor; and memory storing at least one instruction, at least one program, a code set, or an instruction set for execution by the processor to perform: acquiring a currently displayed interface image, and determining a grayscale of each pixel point of the interface image; in the grayscales of all the pixel points, determining the number of each grayscale; acquiring N grayscales, the numbers of the N grayscales being the first N largest numbers, where N is a preset positive integer; when each difference between the N grayscales exceeds a first preset value, and a ratio of a sum of the numbers of the N grayscales to a sum of the numbers of all the grayscales exceeds a second preset value, determining a brightness adjustment parameter corresponding to the interface image; and reducing a current backlight brightness based on the bri

Assignees

• Beijing Xiaomi Mobile Software Co Ltd

Inventors

• Li Guosheng

Classifications

• G09G2330/021

  Power management, e.g. power saving · CPC title

• G09G2320/0626

  for control of overall brightness · CPC title

• G09G2360/16

  Calculation or use of calculated indices related to luminance levels in display data · CPC title

• G09G2320/0666

  for control of colour parameters, e.g. colour temperature · CPC title

• G09G2320/066

  for control of contrast · CPC title