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Saliency-enhanced line drawing automatic generation method

An automatic generation and line drawing technology, applied in the field of image processing, can solve problems such as line contrast, loss of clarity, discontinuity, and the impact of line drawing significance, etc., to achieve strong continuity, reduce details, and have an ornamental effect

Active Publication Date: 2020-02-28
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lines located in salient areas may be lost due to contrast, sharpness, etc., which not only affects the salience of line drawings, but also causes discontinuity problems

Method used

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  • Saliency-enhanced line drawing automatic generation method
  • Saliency-enhanced line drawing automatic generation method
  • Saliency-enhanced line drawing automatic generation method

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Embodiment Construction

[0031] A method for automatically generating line drawings with enhanced significance according to the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Such as figure 1 As shown, a saliency-enhanced line drawing automatic generation method includes steps:

[0032] 1. Realize image preprocessing:

[0033] Before generating line drawings, this embodiment firstly performs preprocessing on the original image to denoise and obtain an image used in the saliency enhancement process. First convert the input color image to the CIE-Lab color space, and use the brightness channel L, and then use the Gaussian filter G to convolve it to achieve the denoising effect:

[0034]

[0035] Among them, 0.7729 is a constant used to ensure that the weight sum is 1.

[0036] The denoised image L is convolved with the Sobel operator to obtain the gradient image. The Sobel operators in the x and y directions are:

[00...

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Abstract

The invention discloses a saliency-enhanced line drawing automatic generation method. The method comprises the following steps: (1) preprocessing an image; (2) achieving significantly enhanced line extraction; and (3) carrying out significance enhancement on the line painting. The method specifically comprises the following steps: expressing a line picture as a set of lines, dividing the lines into two types according to whether the lines are located at the boundary or not, calculating a significance value for each type of lines according to a significance graph and gradient information, and deleting the lines with the significance values lower than a certain threshold value to simplify the line picture; (4) carrying out transparency adjustment, which specifically comprises the following steps: calculating the size of a Gaussian filtering window for each pixel point, and filtering all the pixel points according to the corresponding window size; and finally obtaining the line painting with enhanced significance. The method can be better applied to line drawing generation, and a better result is generated.

Description

technical field [0001] The invention belongs to the field of image processing, and relates to image saliency detection, stream-based continuous enhancement filtering and line drawing generation technology, which can automatically generate saliency-enhanced line drawings according to images. Background technique [0002] Line drawing is a simple and effective means of visual communication. In life, people can quickly identify and appreciate the theme of the subject image through line drawing. The automatic generation of line drawing aims to convey useful information to viewers more effectively. For the artist, drawing prominent line drawings can be more conducive to the artist's expression of the focus of the image. However, the current line drawing generation technology cannot or is difficult to automatically generate this kind of focused line drawing expected by the artist. At present, in the field of image processing, the automatic generation methods of line drawings are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T11/20G06T7/00G06T5/00
CPCG06T11/203G06T7/0002G06T2207/10004G06T2207/30168G06T5/90G06T5/70Y02D10/00
Inventor 刘世光刘子奇
Owner TIANJIN UNIV
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