Generation method for picture with dot painting effect

Abstract

The invention discloses a generation method for a picture with the dot painting effect. The generation method comprises the following steps that a canvas picture is set, and an initial value is set; a significant picture of a reference picture is calculated, all pixel neighborhood mean square error pictures are obtained through the significant picture, and histogram balancing is carried out on the pixel neighborhood mean square error pictures to obtain histogram balancing pictures; the reference picture is converted into a gray picture, and a directional diagram is calculated; random sequences of color dot positions are determined; according to the sequences of the color dot positions, the long-axis size of color dots is determined according to the significant picture, and the short-axis size of the color dots is determined according to the histogram balancing pictures; the long-axis direction of the color dots is determined according to the directional diagram; color information of regions, covered with the color dots, of the reference picture is examined sequentially, and an average value is calculated to obtain a color value sequence of the color dots; the color dots are sequentially painted at the color dot positions on the canvas picture according to the long-axis size, from large to small, of the color dots; whether the painting stopping condition is met is judged, and a dot painting target picture is output after the condition is met. The generated picture has the dot painting effect and keeps the edge feature of the reference picture.

Description

technical field [0001] The invention relates to the field of digital image processing, in particular to a method for generating a stippling effect picture. Background technique [0002] The stippling effect picture is aimed at a reference picture, reproduces its picture content with dots of different sizes, and uses scattered dots to express the continuous tone transformation effect. [0003] The concept of forming a picture with points includes three types: Pointillism, Stippling, and Halftone (dithering): the first is to superimpose scattered, pure-color points of different colors to express the content of a picture, usually referring to a painting method and Style, which belongs to a branch of Impressionism; the second is to express bright and dark tones respectively by dots of a single color with alternating density and density, and to describe the content of the picture, which also refers to a painting method and style; the third and the second The method is similar, m...

AI Technical Summary

Problems solved by technology

These methods generally convert the reference picture into a stippling image, but do not examine its specific hue and frequency characteristics for each picture. For the points at the edge position of the reference picture, the edge information will be blurred due to the color averaging effect. , resulting in the final generation of dot paintings cannot clearly express the edge information of the source image, which affects the information transmission effect of the original image

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