Feature flow-based method for generating abstract line drawing

A technology of line drawing and feature flow, applied in the direction of drawing from basic elements, can solve problems such as insufficient light and shade characteristics of object shapes

Inactive Publication Date: 2013-02-13
INST OF SOFTWARE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] In order to better simulate the characteristics of hand-painted line drawings, and solve the defects of purely isolated lines in the prior art that are not enough to fully describe the light and shade characteristics of the object's shape

Method used

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  • Feature flow-based method for generating abstract line drawing
  • Feature flow-based method for generating abstract line drawing
  • Feature flow-based method for generating abstract line drawing

Examples

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Embodiment Construction

[0040] The present invention will be described in detail below through specific embodiments and accompanying drawings.

[0041] figure 1 It is a flow chart of the technical solution of the present invention, the input is a single image, and the output is the corresponding line drawing result. The present invention draws on the anisotropic filtering framework based on the characteristic flow field, so it is first necessary to calculate a smooth, continuous and feature-preserving directional flow field (structural tensor smoothing technology is used in the specific implementation), and then based on the flow field along the gradient direction to calculate the differential response value of edge detection, and finally the differential response value is subjected to adaptive smoothing filtering along the edge tangential flow direction, and soft thresholding processing to obtain the final line drawing effect. It should be noted that the calculation of the directional flow field in...

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Abstract

The invention relates to a feature flow-based method for generating an abstract line drawing. The invention aims to design a novel filtering method-FGaD filtering. A feature flow-based anisotropic filtering framework is referenced, a core thought is that the sum of the absolute value of Gaussian first-order filtering results and the absolute value of Gaussian difference filtering results is defined as a differential response value for edge detection, and the differential response value is subjected to soft thresholding so as to acquire a highly abstract line drawings result. According to the FGaD filtering method provided by the invention, large-scale visual features can be effectively detected, and adjacent tiny edge lines can be fused, and highly abstract line drawings with strong stylized effects are generated.

Description

technical field [0001] The invention belongs to the technical field of computer graphics, and relates to an abstract line drawing generation method, in particular to a feature flow-based abstract line drawing generation method. Background technique [0002] Line drawing is an abstract means of visualizing shapes and is one of the most common styles found in many non-photorealistic drawing applications. Because of its unique expressiveness and abstraction, line drawing is widely used in art creation, scientific and technological illustrations, animation games, and print advertising design and other fields. Through the analysis of many line drawings, it can be seen that the artist not only uses lines to outline the outline of the object, but also uses black, white and gray to describe the light and shade of the shape: on the main structure of the object, such as the edge outline, the artist uses long and thick Black lines are used to describe important internal details, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T11/20
Inventor 吴恩华王山东刘学慧
Owner INST OF SOFTWARE - CHINESE ACAD OF SCI
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