Text enhancement method and device, text extraction method and device

A text and response strength technology, applied in the field of image processing, can solve problems such as text and background blur, image or video blur, multiple noises, etc., to achieve precise and accurate text extraction, precise and accurate results, and reduce complexity.

Active Publication Date: 2012-12-19
FUJITSU LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the prior art extracts text, there may be too much noise in the video or image, the image or video is blurred, and even if there is a lighting change in a video,

Method used

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  • Text enhancement method and device, text extraction method and device
  • Text enhancement method and device, text extraction method and device
  • Text enhancement method and device, text extraction method and device

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Embodiment Construction

[0036] Embodiments of the present invention will be described below with reference to the accompanying drawings.

[0037] Specifically, see figure 1 , the embodiment of the present invention provides a first text enhancement method, which may specifically include:

[0038] S101: Acquire an original image including a line of text.

[0039] In this embodiment of the present invention, the text enhancement refers to enhancing text in an original image including a line of text. The enhancement here can be understood as deepening the edge of the text, or highlighting the difference between the text and the background, etc. In the application of the embodiments of the present invention, the stroke representation (such as brightness or color, etc.) of the text and the information of its shape (such as the text appearing as stripes) are considered, in order to enhance the consistency of the pixels inside the stroke and deepen the difference between the text and the background. Effe...

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Abstract

The embodiment of the invention discloses a text enhancement method, a text enhancement device, a text extraction method and a text extraction device. The text enhancement method comprises the following steps: acquiring an original image including a line of text; according to the direct difference degree and indirect difference degree between any original pixel in the original image and each neighborhood pixel in a neighborhood set of the original image, carrying out stroke two-dimensional filtering on the original brightness value or/and color value of each original pixel so as to obtain an updated brightness value or/and color value of the filtered original image, wherein the range of the neighborhood set is a square with a side length of w and the original pixel as a center, and w is less than the height of the original image; and respectively replacing corresponding original brightness value or/and color value with the updated brightness value or/and color value after filtering so as to generate a text enhancement image corresponding to the original image. Through the embodiment of the invention, texts in original images can be enhanced, so that the subsequent text extraction on the text enhancement image is more precise and accurate.

Description

technical field [0001] The present invention generally relates to the technical field of image processing, and in particular, to a text enhancement method and device, and a text extraction method and device. Background technique [0002] In the process of playing a video, or when viewing an image, the video or image often contains text descriptions, for example, the description of the time and place of a video, or the description of the image, etc. Since these text contents are closely related to videos or images, extracting text from videos or images becomes a crucial technology. [0003] The text extraction method for video or image in the prior art can be based on binarization, edge color clustering and detection technology to extract text in image or video. [0004] However, during text extraction in the prior art, due to excessive noise in the video or image, the image or video may be blurred, and even if there is a change in lighting in a video, the border between the...

Claims

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Application Information

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IPC IPC(8): G06T5/00G06K9/46
Inventor 潘屹峰胜山裕孙俊直井聪
Owner FUJITSU LTD
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