Method and device for preventing stroke shape from deforming

Abstract

The invention provides a method and a device for preventing a stroke shape from deforming, and relates to the field of image anti-deformation. The method comprises the following steps of: covering the stroke shape, namely determining a required multi-order grayscale stroke shape template according to coordinate information sent by a user, and combining the multi-order grayscale stroke shape template and a coordinate track input by the user; optimizing pixel, namely acquiring an optical pixel value of a target coordinate point according to pixel values of surrounding points of each target coordinate point, and increasing a gray scale of the stroke shape to 256 orders; and smoothing edge curves, namely performing curve fitting on edges of the stroke shape by a curve approximation fitting algorithm. By the invention, the smoothness of the edges of the final input stroke shape is greatly improved, and sawtooth or a stepped deformation effect of shape edges is eliminated to a great extent.

Description

technical field [0001] This application relates to the field of image anti-aliasing, and especially designs a method and device for anti-pen-aliasing. Background technique [0002] When drawing various graphics on the liquid crystal display, such as when the user draws an inclined straight line or curve during handwriting recognition, jagged or stepped rough effects often appear on the pen-shaped boundary, which is called aliasing. In the prior art, the drawing of the display is to display graphics one by one in sequence. The pixel itself is a rectangle with a certain width. If a certain pixel is within the coordinate range of the graphics to be displayed, a certain color will be displayed. If the background color is displayed outside the graphics range, when these rectangles are arranged in sequence on a slanted line, a jagged or stepped aliasing effect will be formed; when graphics are drawn on some high-resolution displays The aliasing of the pen shape can be observed wi...

AI Technical Summary

Problems solved by technology

In the prior art, the drawing of the display is to display graphics one by one in sequence. The pixel itself is a rectangle with a certain width. If a certain pixel is within the coordinate range of the graphics to be displayed, a certain color will be displayed. If the background color is displayed outside the graphics range, when these rectangles are arranged in sequence on a slanted line, a jagged or stepped aliasing effect will be formed; when graphics are drawn on some high-resolution displays The aliasing of the pen shape can be observed with the naked eye. If it is an embedded device with a lower resolution, the aliasing effect of the pen shape will be more obvious, which reduces the user experience in human-computer interaction to a certain extent.

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