Sticker generation method and device

Patent metadata

Field	Value
Publication number	US-2025157116-A1
Application number	US-202318839310-A
Country	US
Kind code	A1
Filing date	Feb 13, 2023
Priority date	Feb 16, 2022
Publication date	May 15, 2025
Grant date	—

Abstract

Embodiments of the invention provides a sticker generation method and device, an electronic device, a computer readable storage medium, a computer program product and a computer program. The method comprises: obtaining a material image of a target component on an avatar, the target component being in motion in a sticker comprising the avatar; determining a global position of the target component according to the material image; determining a periodic motion amplitude of the target component in the sticker; generating the sticker according to the material image, the global position, and the periodic motion amplitude. Therefore, a dynamic effect of components in the sticker is achieved, a user does not need to master a specific software and use complex skills to perform vertex layout and movement, and a specific model file does not need to be involved. Thus, the sticker making difficulty is reduced, the sticker making efficiency is improved, and better user experience is achieved.

First claim

1 . A method of generating a sticker, comprising:
obtaining a material image of a target component on an avatar; determining a global position of the target component according to the material image; determining a periodic motion amplitude of the target component in the sticker; generating a sticker according to the material image, the global position, and the periodic motion amplitude, wherein the generated sticker, the target component is driven to move according to the global position and the periodic motion amplitude.

2 . The method of generating a sticker according to claim 1 , wherein determining the periodic motion amplitude of the target component comprises:
determining an upper limit of a motion amplitude of the target component; and determining the periodic motion amplitude according to a periodic function and the upper limit of the motion amplitude.

3 . The method of generating a sticker according to claim 2 , wherein determining the periodic motion amplitude of the target component comprises:
determining motion weights of the target component at a plurality of moments using the periodic function; and determining the periodic motion amplitude according to the motion weights of the target component at a plurality of moments and the upper limit of the motion amplitude.

4 . The method of generating a sticker according to claim 3 , wherein determining the motion weights of the target component at a plurality of moments using the periodic function comprises:
determining the motion weights of the target component at the plurality of moments using the periodic function according to an image frame number and a frame rate of a sticker to be generated.

5 . The method of generating a sticker according to claim 3 , wherein before determining the motion weights of the target component at a plurality of moments using the periodic function, the method further comprises:
determining the periodic function according to a duration of a sticker to be generated, wherein the periodic function is a sinusoidal function.

6 . The method of generating a sticker according to claim 2 , wherein determining the upper limit of the motion amplitude of the target component comprises:
determining the upper limit of the motion amplitude according to the global position, the global position indicating a component size of the target component, and the upper limit of the motion amplitude being directly proportional to the component size.

7 . The method of generating a sticker according to claim 6 , wherein determining the upper limit of the motion amplitude according to the global position comprises:
determining the component size according to the global position; and determining the upper limit of the motion amplitude according to the component size and an image size of a sticker to be generated.

8 . The method of generating a sticker according to claim 7 , wherein in the generated sticker the target component is in a first motion state, the first motion state comprising a state of left-right swinging, the component size comprising a component height and a component width of the target component, the upper limit of the motion amplitude comprising a maximum amplitude of left-right swinging of the target component, determining the upper limit of the motion amplitude according to the component size and the image size of the sticker comprising:
determining a ratio between the component height and an image height in the image size; and determining the maximum amplitude of left-right swinging of the target component according to the ratio, the component width, and a first scaling parameter.

9 . The method of generating a sticker according to claim 7 , wherein in the generated sticker the target component is in a second state, the second motion state comprising an up-down fluctuation state, the component size comprising a component height of the target component, the upper limit of the motion amplitude comprising a maximum amplitude of up-down fluctuation of a plurality of columns of vertexes in the target component, determining the upper limit of the motion amplitude according to the component size and the image size of the sticker comprising:
determining a ratio between the component height and an image height in the image size; determining floating weights corresponding to the plurality of columns of vertexes through a non-linear function; and determining the maximum amplitude of up-down fluctuation of the plurality of columns of vertexes according to the ratio, the component weight, the floating weights corresponding to the plurality of columns of vertexes and a second scaling parameter.

10 . The method of generating a sticker according to claim 1 , wherein generating the sticker according to the material image, the global position, and a periodic motion amplitude comprises:
determining a position and a shape of the material image on each frame of image in the sticker through a driving algorithm according to the global position and the periodic motion amplitude, to obtain the sticker.

11 . The method of generating a sticker according to claim 1 , wherein determining the global position of the target component according to the material image comprises:
determining an external matrix of the target component in the material image; determining the global position according to the external matrix.

12 . (canceled)

13 . An electronic device, comprising:
at least one processor and a memory; the memory storing a computer executive instruction; the at least one processor executing the computer executive instruction stored by the memory such that the at least one processor executes the method of generating a sticker comprising: obtaining a material image of a target component on an avatar; determining a global position of the target component according to the material image; determining a periodic motion amplitude of the target component; generating a sticker according to the material image, the global position, and the periodic motion amplitude, wherein in the generated sticker, the target component is driven to move according to the global position and the periodic motion amplitude.

14 . A computer readable storage medium, the computer readable storage medium storing a computer executive instruction therein, and implementing the method of generating a sticker comprising:
obtaining a material image of a target component on an avatar, wherein in a sticker comprising the avatar, the target component is in a motion state; determining a global position of the target component according to the material image; determining a periodic motion amplitude of the target component; generating a sticker according to the material image, the global position, and the periodic motion amplitude, wherein in the generated sticker, the target component is driven to move according to the global position and the periodic motion amplitude.

15 . (canceled)

16 . (canceled)

17 . The electronic device of claim 13 , wherein determining the periodic motion amplitude of the target component comprises:
determining an upper limit of a motion amplitude of the target component; and determining the periodic motion amplitude according to a periodic function and the upper limit of the motion amplitude.

18 . The electronic device of claim 17 , wherein determining the periodic motion amplitude of the target component comprises:
determining motion weights of the target component at a plurality of moments using the periodic function; and determining the periodic moti

Assignees

• Lemon Inc

Inventors

• Zeng Weihong
• Wang Xu
• Liu Jing
• Sang Shen
• Liu Haishan

Classifications

• G06T13/80

  Two-dimensional [2D] animation, e.g. using sprites · CPC title

• G06T13/40 Primary

  of characters, e.g. humans, animals or virtual beings · CPC title

• G06T11/60 Primary

  Creating or editing images; Combining images with text · CPC title

• G06T7/73

  using feature-based methods · CPC title

• G06F16/58

  Retrieval characterised by using metadata, e.g. metadata not derived from the content or metadata generated manually · CPC title