A method and device for generating a shadow special effect map

Abstract

The embodiment of the invention discloses a shadow effect picture generating method and apparatus. The method includes the following steps that: a shadow effect addition instruction of a user is received, and a target shadow effect is determined; target canvas is established, a first duplicate of a target picture is creased on the established target canvas, the deviation parameters of any pixel coordinate in the first duplicate of the target picture are the same with the deviation parameters of the target shadow effect relative to the deviation parameters of a corresponding pixel coordinate in the target picture, wherein the deviation parameters include deviation direction and deviation distance; the color parameters of the pixels of the first duplicate of the target picture are replaced with the color parameters of the target shadow effect; and a second duplicate of the target picture is creased at a position on the target canvas which has the same coordinate with the target picture, and the second duplicate of the target picture is made to cover the first duplicate of the target picture of which the color parameters have been replaced, and the shadow effect picture of the target picture can be generated. Compared with the prior art, the shadow effect obtained through utilizing the method and device of the invention is more real.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a method and device for generating shadow special effect images. Background technique [0002] Now, people can use image processing software to process special effects on some of their favorite pictures to increase interest, for example, shadow effects can be added to pictures. [0003] However, in the prior art, shadow effects are usually added to the entire picture, that is, shadow effects are added according to the actual outline of the picture. Such as figure 1 As shown in the picture, a rectangular box is displayed in the picture, and the middle of the rectangular box is a transparent area. After using the existing technology to add shadow effects to it, the obtained effect picture is as follows figure 2 shown. from figure 2 It can be seen from the figure that the shadow effect is added to the entire picture, not to the five-pointed star in the picture, and what the us...

AI Technical Summary

Problems solved by technology

from figure 2 It can be seen from the figure that the shadow effect is added to the entire picture, not to the five-pointed star in the picture, and what the user really wants may be to add a shadow effect to the five-pointed star in the picture, that is, to add only to the outline of the rectangular frame The shadow effect cannot be added to the inner contour connected to the middle transparent area

Like this, prior art just can't satisfy user's demand, the shadow special effect shown like this is unreal, and visual effect is not good

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