Text detecting method and apparatus

A text and non-text technology, applied in the field of human-computer interaction, can solve the problems of time-consuming, consume large processor resources and computing time, and process cumbersome processing, and achieve the effect of reducing computing complexity, saving processor resources and computing time

Inactive Publication Date: 2016-06-29
SHARP KK
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Problems solved by technology

[0005] However, by analyzing the above SWT algorithm, it is easy to know that the algorithm has the following problems: because the stroke edge is in an irregular shape, it is a very complicated process to calculate the tangent direction at the pixel point p in step S120. The complexity is high and consumes a large amount of processor resources and calculation time; in step S150, the stroke width w is compared with the value a stored in association with the pixel point t, however, due to the large number of stroke edge points and the irregular shape of the stroke edge, the points inside the stroke There may be mul

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  • Text detecting method and apparatus
  • Text detecting method and apparatus

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Embodiment Construction

[0045] The simplified estimated stroke width (ESW) text detection method proposed by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the present invention should not be limited to the specific examples described below. In addition, for the sake of brevity, detailed descriptions of known technologies that are not directly related to the present invention are omitted to prevent confusion to the understanding of the present invention.

[0046] The following describes multiple embodiments of the present invention in detail by taking multiple specific orientations as an example to calculate the stroke width of each pixel in the stroke. However, it should be pointed out that the present invention is not limited to the following embodiments, but is applicable to more other text detection or optical character recognition OCR methods and systems.

[0047] The following will combine ...

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Abstract

The invention provides a method for calculating the estimated stroke width (ESW). The method comprises the steps of obtaining stroke edge information according to a binary image; calculating the stroke width of each stroke edge pixel point in not less than four orientations, with the stroke width of each stroke edge pixel point in the not less than four orientations being the distance from the stroke edge pixel point to another stroke edge pixel point located on a straight line determined by the stroke edge pixel point and the orientations; associating the stroke width of each stroke edge pixel point in the not less than four orientations with each stroke interior pixel point passing the stroke edge pixel point and along the orientations; and for each stroke interior pixel point, selecting the minimum value of the plurality of stroke width values associated with the stroke interior pixel point as the ESW of the stroke interior pixel point. The invention further provides an apparatus corresponding to the method.

Description

technical field [0001] The invention relates to human-computer interaction technology, in particular to text detection or optical character recognition (OCR) technology. Background technique [0002] Natural scenes not only contain a large amount of graphic information, but also rich text information, such as road signs, store names, etc. These text information are of great value to the description and understanding of scene content, and this information is the key clue of scene image retrieval. Therefore, an automated tool is urgently needed to obtain text information in the scene through text recognition in natural scenes, serve for retrieval, query, browsing scene image data and understand scene content, and improve the management efficiency of image data. Mobile phones, PDAs, desktop computers, laptops, tablets, and other electronic devices often support text detection or optical character recognition (OCR). [0003] Stroke Width Transform (SWT) is a commonly used text...

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Application Information

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IPC IPC(8): G06K9/20G06K9/34
CPCG06V10/10
Inventor 江淑红吴波
Owner SHARP KK
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