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An water-ink painting rendering method based on adaptive style conversion

A style conversion and ink painting technology, applied in 3D image processing, image data processing, instruments, etc., can solve problems such as wrong synthesis of texture blocks, failure to consider color difference information, and size affecting style rendering effects, etc., to avoid texture synthesis and avoid Useless, effect that preserves the style characteristics of the reference

Active Publication Date: 2019-03-08
SHANTOU UNIV
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  • Summary
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One is that the traditional algorithm is based on fixed blocks for texture synthesis. The size of the block affects the rendering effect of the style. If the block is too large, the details of the original image will be lost. Otherwise, the characteristics of the reference style cannot be reflected.
The second is that the traditional algorithm only considers the brightness information of the original image in the texture synthesis, and does not consider the color difference information. For black and white ink paintings, the texture blocks will inevitably be synthesized by mistake.

Method used

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  • An water-ink painting rendering method based on adaptive style conversion
  • An water-ink painting rendering method based on adaptive style conversion
  • An water-ink painting rendering method based on adaptive style conversion

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Example 1: Realizing ink painting rendering through adaptive partitioning

[0026] According to attached figure 1 , in the simulation experiment, the weight thresholds α and β of the error function are set to 0.2, μ is set to 0.6, and the size M of the best texture block candidate set is set to 80. The variance threshold D of the adaptive block is set to 0.4, the maximum size w of the block is set to 32, and the minimum size is set to 4. The input grayscale image C and colored style image S, according to the attached figure 2 , initialize P n =C (the size is m×m), at this time, the number of blocks N=1. When P n When the local variance σ is greater than D or the size m is greater than w, the P n Quarters (size of ), the number of blocks is increased to N+3, and each block is traversed in turn until all blocks do not meet the conditions, and N blocks P are obtained n . Extend the edge of each block such that P n is of size P n and P n-1 There is overlap P ...

Embodiment 2

[0031] Example 2: Investigate the influence of adaptive partitioning on the rendering results of ink painting

[0032] attached Figure 4What is characterized is when the minimum block size is 4, the results of the ink painting rendering method through the adaptive block and the ink painting rendering method through the fixed block are compared. It can be seen from the area marked by the red frame that the method proposed in the present invention can more effectively reconstruct the details of the original ink painting through the adaptive block ink painting rendering method, while effectively retaining the texture features of the reference style map.

Embodiment 3

[0033] Example 3: Investigate the influence of the modified penalty function on the rendering results of ink painting

[0034] attached Figure 5 What is represented is the comparison of ink painting rendering effects by calculating penalty functions respectively when β=0.2 and β=0. It can be seen from the results that the penalty function modified by the present invention considers the color difference information to find the best matching texture block to realize ink painting rendering (that is, the result when β=0.2), effectively avoiding the generation of useless textures, and making the rendering result more in line with the original Semantics of graphs.

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Abstract

The embodiment of the invention discloses an efficient water-ink painting rendering method. For black-and-white water-ink painting, the water-ink painting is rendered into an image with a reference style given a reference style. The proposed method is based on adaptive style transformation. According to the block texture synthesis technology, the original ink painting is adaptively divided into blocks to reconstruct the detail structure of the original image. At that same time, the reference style features are effectively retained. In addition, the invention considers the color difference information in the texture synthesis stage, and optimizes the texture synthesis result by modifying the penalty function in the Markov model, so as to avoid useless texture synthesis and make the reconstructed image accord with the semantic understanding of the original image.

Description

technical field [0001] The invention relates to the field of image texture analysis and synthesis, in particular to an ink painting rendering method based on adaptive style conversion. Background technique [0002] The purpose of image style rendering is to maintain the structural content of the original image while combining the style characteristics of the reference image. In recent years, with the rapid development of deep learning algorithms, image style conversion has once again attracted the attention of researchers. The present invention is aimed at the style rendering of Chinese ink painting. As a traditional form of painting in China, ink painting is created through complex brush strokes and ink rendering methods. Compared with Western paintings, the colors are single, only black, white and gray, but the expressive content is rich. Rendering ink wash paintings into different colorful styles while retaining the original rich and detailed content is challenging and...

Claims

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Application Information

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IPC IPC(8): G06T15/20G06T15/04G06T15/00
CPCG06T15/005G06T15/04G06T15/205
Inventor 邹婉欣李旭涛
Owner SHANTOU UNIV
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