Interaction platform based method for rapidly detecting text in complex background

Abstract

The present invention discloses an interaction platform based method for rapidly detecting a text in a complex background. The method comprises the following steps: S1: inputting an image for preprocessing; S2: rapidly positioning of a text candidate area: performing contour detection on the image processed in the step S1, and performing frame selection on each closed area by using a rectangular frame, then rapidly positioning all angle points in each rectangular frame by using an SIFT algorithm, and performing preliminary screening by using the number of the angle points as a preliminary screening condition; S3: firstly adjusting the image to a uniform size by using a normalization algorithm, then projecting contents in an original image to an exact center of the normalized image by a forward mapping method, and correcting an angle appropriately; and S4: text / background screening: extracting a feature firstly, and using a candidate area that is screened by a trained classifier as a detected text area. According to the method provided by the present invention, text detection in a complex background is realized, and a major problem that is solved is how to rapidly position a horizontal text and a text with a rotation angle in the image in the case of maintaining relatively high accuracy.

Description

technical field [0001] The invention relates to the fields of computer vision and human-computer interaction, in particular to a rapid detection method for text in complex backgrounds based on an interactive platform. Background technique [0002] The problem of text detection in complex backgrounds is regarded as a classic problem in both the field of computer vision and the field of human-computer interaction. There are two reasons. First, this technology has a wide range of applications. For example, this technology can be used to allow smart devices such as mobile phones to read books for us, or it can be applied to unmanned vehicles to allow vehicles to automatically recognize road signs. Secondly, the text detection problem is sometimes very difficult to solve, because text detection is different from general target detection such as faces, vehicles, and pedestrians. The shape of the text is more changeable (various degrees of deformation and blurring often appear), ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a fast detection method for text in complex backgrounds based on an interactive platform, which solves the problem of too slow text positioning speed, and can quickly locate the text in the picture, and has a relatively fast detection method. strong robustness

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