Image-text matting method and device in image

Abstract

The invention relates to the technical field of picture processing, and particularly discloses a method and device for matting pictures and texts in an image, and the method comprises the steps: drawing a three-channel first picture according to a preset first picture drawing strategy; drawing a second picture of the three channels according to a preset second picture drawing strategy; drawing a third picture of four channels according to a preset third picture drawing strategy; and enabling the pixel points of the first picture, the second picture and the third picture to be in one-to-one correspondence, and resetting each pixel point of the third picture to generate a target picture. According to the invention, the matting of the color image-text is realized, the target picture with semitransparent property is generated, the anti-aliasing effect of the target picture is further improved, and a very good display effect can be achieved when the target picture is superimposed on other pictures or videos; and on the other hand, the method is not limited to cutout of patterns or characters and is not limited to the color effect of images and texts, and the current situation that onlysingle color images and texts can be cutout in the prior art is completely reformed.

Description

technical field [0001] The invention relates to the technical field of picture processing, in particular to a method and device for extracting pictures and texts from an image. Background technique [0002] At this stage, the method of directly integrating the picture content with the video or another picture needs to separate the picture content and the picture background from the picture. The picture content refers to the picture and text in the picture, and the picture background refers to the content other than the picture content. . [0003] In the prior art, the image extraction method of the graphic engine is used to separate the image content and the image background, and a new image with the image content is generated from the image content. However, after the existing graphic engine is separated, new pictures with picture content will have poor anti-aliasing effect, and the display accuracy of new pictures with picture content is not high, which will obviously aff...

AI Technical Summary

Problems solved by technology

However, after the existing graphic engine is separated, new pictures with picture content will have poor anti-aliasing effect, and the display accuracy of new pictures with picture content is not high, which will obviously affect the use of new pictures with picture content effects, and the image extraction methods of the existing graphics and text engines generally cannot support non-standard artistic words and colored words (including gradient colored words and colored words with multiple colors, in which, there can be either a colored word in the picture content There can also be multiple colored characters), so that it is not easy to extract or separate the non-standard artistic characters and colored characters, such as the background color is white, the edge of the font in the foreground is black, and the middle is also white , the extracted foreground may appear fully transparent in the middle

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