Picture words detecting method

A text detection and image technology, applied in character and pattern recognition, instruments, calculations, etc., can solve the problems of not fully utilizing the color information of the text area, unable to locate the text area well, and difficult to text information, and achieve simple text detection. and accuracy, simple edge cases, high recall and precision

Inactive Publication Date: 2008-02-13
PEKING UNIV
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Problems solved by technology

This method has the following disadvantages: (1) how to find the text information that can accurately describe the content of the picture itself is a very difficult thing in the webpage; (2) there is no corresponding webpage information for a large number of pictures
This method only uses the edge features of the text area, but does not make full use of the color information of the text area, so it cannot locate the text area well, and the text detection results need to be improved

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] As shown in Figure 1, a kind of method of picture character detection of the present invention specifically comprises the following steps:

[0025] (1) Merge the edge maps of the original image on multiple color components to obtain the cumulative edge map.

[0026] The cumulative edge map is obtained by merging multiple edge maps detected by the improved Sobel edge detection operator on each YUV component of the picture. The method of merging is shown in formula 1, E is the cumulative edge map, E Y ,E U and E V are the edge maps detected by the improved Sobel edge detection operator on each YUV component of the picture, and E(x, y) is the edge intensity value of the point whose coordinates are (x, y) in the cumulative edge map, which is equal to E. Y ,E U and E V The smaller one of the cumulative sum of the edge intensi...

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Abstract

The invention provides an image character detection method, which comprises following steps: (1) joining edge images of the original image at each color component to get an accumulated edge image; (2) setting the edge points of the accumulate edge image to the color corresponding to that of the points in the original image, decomposing the accumulated edge image to a plurality of sub edge images with a clustering method in accordance with difference of edge point color, and each sub edge image containing edge points with similar colors; (3) carrying out horizontal projecting and vertical projecting for many times for each sub edge image, partitioning the image vertically and horizontally in accordance with the projecting images, and positioning the character area in the image. The invention is used for decomposing an accumulated edge image to a plurality of sub edge images with a color-based clustering method after getting the accumulated edge image from the original image, thus simplifying edges of the sub edge images and making the detection of character area in an image more simple and accurate.

Description

technical field [0001] The invention belongs to the technical field of image processing and retrieval, and in particular relates to a method for detecting text in pictures. Background technique [0002] With the rapid development of Internet technology and multimedia technology, the picture content on the Internet shows an explosive growth trend. How to quickly retrieve the desired picture from the massive picture content has become a key problem that needs to be solved urgently. The existing methods are mainly based on the text description information in the webpage corresponding to the picture, but do not go deep into the analysis of the picture content. This method has the following disadvantages: (1) how to find the text information that can accurately describe the content of the picture itself is a very difficult thing in the webpage; (2) there is no corresponding webpage information for a large number of pictures. [0003] On the other hand, a large number of pictures...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/20G06K9/46
Inventor 易剑彭宇新肖建国
Owner PEKING UNIV
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