Inclination angle correcting method of text image, page layout analysis method of text image, vision assistant device and vision assistant system
A text image, layout analysis technology, applied in the field of optical character recognition, can solve the problem of affecting the effect of tilt angle detection, the impact is large, the amount of calculation is large, and the effect of relieving reading fatigue, fast processing speed, and high accuracy is achieved.
Inactive Publication Date: 2016-10-05
深圳市思路飞扬创新管理有限公司
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However, this method is computationally intensive and slow
Moreover, if the illumination of the text image is not ideal, after binarization, the images in many areas will be blurred, which will affect the effect of tilt angle detection. Therefore, the existing methods are greatly affected by the illumination
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[0025] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0026] In the present invention, unless stated to the contrary, the orientation words "horizontal", "vertical", "left", "right", "height" and "length" generally refer to the The orientation of the image.
[0027] figure 1 It is a flow chart of the method for correcting the inclination angle of a text image provided by the embodiment of the present invention. Such as figure 1 As shown, the skew angle correction method of the text image may include the following steps:
[0028] Step S101, performing edge detection on the text image to obtain an edge image. For example, the sobel edge detection algorithm can be applied to the text image for edge detection. In...
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The present invention discloses an inclination angle correcting method of a text image, a page layout analysis method of the text image, a vision assistant device and a vision assistant system. The inclination angle correcting method of the text image comprises the steps of carrying out the edge detection on the text image to obtain an edge image; carrying out the connected domain detection on the text image to obtain a center point of an external rectangle of the connected domain of the text image; carrying out the connected domain detection on the edge image to obtain a center point of an external rectangle of the connected domain of the edge image; applying a Hough transformation method on a set of the center point of the external rectangle of the connected domain of the text image and the center point of the external rectangle of the connected domain of the edge image to carry out the inclination angle detection to thereby obtain an inclination angle of the text image; correcting the inclination angle of the text image when the inclination angle is greater than or equal to a preset first inclination angle threshold value. The inclination angle correction method of the text image of the present invention does not need to carry out the Hough transformation on each pixel of the text image, is small in operation amount and high in accuracy, and is influenced by the illumination rarely.
Description
technical field [0001] The invention relates to the field of optical character recognition, in particular to a method for rectifying the inclination angle of a text image, a layout analysis, a visual aid device and a system. Background technique [0002] Reading books has always been an important means for people to obtain information and communicate with each other. But for blind people who are blind, they can only read Braille books independently. If you want to read ordinary books, you must ask others to help you read aloud. At present, there are some e-book reading software that can make sounds on the market, but they can only read the stored "e-books" by voice. For paper books, some vision aids can perform voice reading on a selected part of the content, but there is no vision aid that can automatically perform voice reading on the entire page at one time. [0003] In addition, in the process of optical character recognition of the visual aid, the text image must fir...
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Inventor 沈沾俊刘程浩陈少发张书强陈菊敏
Owner 深圳市思路飞扬创新管理有限公司