Method for realizing positioning fitting of cover plate glass and liquid crystal screen

Abstract

The invention discloses a method for realizing the positioning fitting of cover plate glass and a liquid crystal screen. The method comprises the following steps of: obtaining the image of the cover plate glass and the image of the liquid crystal screen, detecting characteristic points in the images, selecting one group of opposite angle marks through condition restriction, carrying out connection, carrying out refining treatment on the pixel characteristic values of each obtained characteristic point to obtain a sub pixel level coordinate value, obtaining a control parameter, and controlling the cover plate glass and the liquid crystal screen to move to finish monocular preliminary checkout; obtaining the images of one group of angular points of the cover plate glass and the images of one group of angular points of the liquid crystal screen, and detecting the edges of the images to obtain the image which is only provided with an edge line; finally, extracting straight lines from the edge image, screening lines to determine two edge straight lines of each required angular point, calculating the coordinate of each angular point, obtaining the midpoint coordinate and the slope of one diagonal line of the cover plate glass, the coordinate difference value of two midpoints and the inclined angle of two straight lines, and the midpoint coordinate and the slope of one diagonal line of the liquid crystal screen, the coordinate difference value of two midpoints and the inclined angle of two straight lines; and controlling the cover plate glass and the liquid crystal screen to move to enable the two straight lines to be in parallel and enable the midpoints to be subjected to superposition so as to finish the fitting of the cover plate glass of the touch screen and the liquid crystal screen.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a method for laminating a cover glass of a touch screen and a liquid crystal screen based on machine vision guidance. Background technique [0002] Driven by high-end electronic products in recent years, the market size of the touch screen industry has also continued to expand. The touch screen has many advantages such as responsiveness, convenient operation, and low cost. With this technology, as long as you touch the corresponding icon or text on the LCD screen with your finger, you can operate applications such as software access or text editing, which makes human-computer interaction more friendly. Extremely intuitive, and this technology also greatly facilitates the user's operation. Today, touch screens can be widely used in products such as smart phones, tablet computers, and vehicle-mounted mobile terminals. [0003] For the ever-increasing demand for touch screens, in ...

AI Technical Summary

Problems solved by technology

[0003] For the ever-increasing demand for touch screens, in industrial mobile phone production projects, most of the chip production and casing production and installation are completed by automated assembly lines, but the screen pasting process still requires manual operations.

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